CN102355274A - Channel adjusting and storing device for radio receiver chip and method - Google Patents
Channel adjusting and storing device for radio receiver chip and method Download PDFInfo
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- CN102355274A CN102355274A CN2011103019701A CN201110301970A CN102355274A CN 102355274 A CN102355274 A CN 102355274A CN 2011103019701 A CN2011103019701 A CN 2011103019701A CN 201110301970 A CN201110301970 A CN 201110301970A CN 102355274 A CN102355274 A CN 102355274A
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Abstract
The invention relates to a channel adjusting and storing device for a radio receiver chip and a method. The radio receiver chip comprises a frequency synthesizer, an orthogonal frequency mixer, an analog-to-digital converter, a digital signal processor and a digital-to-analog converter; and the device comprises a logic encoder, a logic encoder state machine, a non-volatile memory and a communication interface master control unit. In the invention, BOM (Bill Of Material) cost can be reduced and a channel can be stably stored after power failure in a low and medium-frequency receiver.
Description
Technical field
The present invention relates to microelectronic, relate in particular to a kind of accent platform that is used for the radio reception machine chip and deposit table apparatus and method.
Background technology
Broadcast receiver is a widely used electronic product during the people lives.In order to realize wireless function, broadcast receiver generally is made up of signal processing, control section and display part three parts of grading.Wherein, signal processing is accomplished reception to radiofrequency signal, amplification, demodulation and to the processing of audio signal; Control section is accomplished operations such as adjustment radio station and adjustment volume usually; The display part is used to show information such as current radio station, volume and reception quality of signals.
As shown in Figure 1; Structured flowchart for superheterodyne in the prior art; In the prior art, superheterodyne can comprise antenna 11, image frequency rejects trap 12, low noise amplifier 13, frequency mixer 14, local oscillator 15, frequency-selecting filter 16, FM/AM demodulator 17, audio process 18 and loud speaker 19.Receive the signal of coming from antenna 11 and at first pass through image frequency rejects trap 12,, send into then in the low noise amplifier 13, amplify faint radiofrequency signal the interference signal filtering.The local oscillation signal that signal after the amplification and local oscillator 15 produce carries out mixing in frequency mixer 14, convert the lower intermediate-freuqncy signal of frequency to, sends into then in the frequency-selecting filter 16; The signal of this TV station is chosen; Adjacent platform and other interference signals are curbed, next get into FM/AM demodulator 17, accomplish demodulation FM or AM signal; Signal after the demodulation is exactly an audio signal, is sent to loud speaker 19 after handling through the audio frequency power amplifier of audio process 18.When transferring platform, the frequency of the local oscillated signal that local oscillator 15 produces can change, and the radiofrequency signal in so different radio station will be converted to the intermediate-freuqncy signal in the certain frequency scope.The tradition broadcast receiver adopts the method for PVC to transfer platform usually; As shown in Figure 2, be the structural representation of local oscillator in the structured flowchart shown in Figure 1 in the prior art, local oscillator 15 comprises PVC electric capacity 151, inductance 152 and oscillating circuit 153; PVC electric capacity 151 forms parallelly connected LC loop with inductance 152; Cooperate oscillating circuit 153, form a LC oscillator, the frequency of oscillation F of LC oscillator is:
The signal that this LC oscillator produces is a local oscillated signal, and the user is actually the value of adjustment PVC electric capacity when transferring platform, and then changes the frequency of oscillation of local oscillator 15, thereby reaches the purpose in adjustment radio station.As shown in Figure 3, be the structural representation of image frequency rejects trap in the structured flowchart shown in Figure 1 in the prior art, image frequency rejects trap 12 also is a LC loop, the centre frequency of its centre frequency and local oscillator 15 differs an intermediate frequency.
The shortcoming of superheterodyne has two: first shortcoming is to adopt PVC electric capacity, and cost is higher; As shown in Figures 2 and 3, in order to accomplish the function that image frequency suppresses and transfer platform simultaneously, the FM/AM receiver must use two PVC electric capacity simultaneously; Be the duplex structure, one of them PVC electric capacity is used to adjust the frequency of local oscillator 15, and another one is used to adjust the centre frequency of image frequency rejects trap 12; In order to satisfy the demand on the performance; These two PVC electric capacity all are indispensable, if support AM to receive simultaneously and the FM reception, just must use the structure of tetrad; Use a plurality of PVC electric capacity must cause material list (Bill of Material; Hereinafter to be referred as: the BOM) rising of cost, and PVC electric capacity volume is too big, and the space of the pcb board that causes taking is too many; Increase the BOM cost on the one hand, also be unfavorable for the miniaturization of product on the other hand.Second shortcoming is after outage, stably to preserve the radio station; The tradition broadcast receiver is after shutdown, as long as the value of PVC electric capacity is constant, the radio station can preserve.But in case the user runs into PVC electric capacity unintentionally during shutting down, cause its value that variation has taken place, after then starting shooting once more, received radio station will be before different with shutdown.
To first shortcoming, adopt the framework of revising receiver and the method that adopts potentiometer accent platform to solve.As shown in Figure 4; Be the wireless structural representation of Low Medium Frequency in the prior art; Can comprise: antenna 11, low noise amplifier 41, frequency synthesizer 42, orthogonal mixer 43, analog to digital converter 44, digital signal processor (digital signal processor; Hereinafter to be referred as: DSP) 45, digital to analog converter 46, audio-frequency power amplifier 47, audio player 48, potentiometer 49, station information generation module 410; Wherein, low noise amplifier 41, frequency synthesizer 42, orthogonal mixer 43, analog to digital converter 44, DSP 45, digital to analog converter 46, audio-frequency power amplifier 47, station information generation module 410 can be integrated on the chip.The wireless operation principle of this Low Medium Frequency is following: the signal that is received by antenna 11; Through after the amplification of low noise amplifier 41; Be divided into I, Q two paths of signals; I, Q two paths of signals carry out mixing with the quadrature local oscillated signal that frequency synthesizer 42 produces respectively in orthogonal mixer 43; I after the mixing, Q two paths of signals quantize through analog to digital converter 44 respectively, and the I after the quantification, Q two paths of signals enter into DSP 45 and carry out image frequency inhibition, frequency-selective filtering, FM/AM demodulation accent Audio Processing afterwards, and the two-way digital audio and video signals after the processing converts simulated audio signal to through digital to analog converter 46 again; Simulated audio signal is sounded in audio player 48 through the driving of audio-frequency power amplifier 47.Low Medium Frequency broadcast receiver shown in Figure 4 is compared with traditional superheterodyne shown in Figure 1, need before mixing, not carry out image frequency and suppress, and the function that its image frequency suppresses realizes in DSP, can save the radio-frequency front-end image frequency and suppress needed PVC capacitor.In structural representation shown in Figure 4; Generate local oscillated signal by frequency synthesizer 42; As shown in Figure 5, be the structural representation of structural representation medium frequency synthesizer shown in Figure 4 in the prior art, frequency synthesizer 42 can comprise phase frequency detector 51, loop filter 52, voltage controlled oscillator 53, frequency divider 54, frequency dividing ratio controller 55 and orthogonal signal generator 56; In fact phase frequency detector 51, loop filter 52, voltage controlled oscillator 53 and frequency divider 54 form a phase-locked loop; Input frequency dividing ratio controller 55 be station information, station information refers to the frequency in radio station, frequency dividing ratio controller 55 is converted into frequency dividing ratio with station information; After phase-locked loop is finally stable, reference frequency F
RefWith feedback frequency F
DivEquate, i.e. F
Ref=F
DivThe frequency of the local oscillated signal of frequency synthesizer 42 generations is F like this
Ref* W, wherein, W is a frequency dividing ratio; This shows; The frequency of the local oscillated signal that frequency synthesizer 42 produces is no longer relevant with the value of PVC electric capacity, only with reference frequency and station information relation is arranged, like this; Compare with traditional superheterodyne, this scheme can be saved another one PVC capacitor.In addition, in structural representation shown in Figure 4, also adopted potentiometer 49 as transferring platform device, 49 couples of supply voltage V of potentiometer
DDCarry out dividing potential drop; Station information generation module 410 changes into station information with the magnitude of voltage of potentiometer 49 outputs; Be sent to frequency synthesizer 42, station information generation module 410 can be through analog to digital converter and the realization of radio station map unit, wherein; Analog to digital converter 44 is converted into digital signal with the magnitude of voltage of potentiometer 49 outputs, and the radio station map unit is mapped as station information with this digital signal again.Potentiometer 49 is to adjust the radio station through the mode of rotation with the similarity of PVC electric capacity, can be compatible with the broadcast receiver mould that uses PVC electric capacity well, also meet PVC client's use habit.
Structural representation shown in Figure 4 uses potentiometer 49 as transferring the platform device, and still, the potentiometer that general cost is low is shorter useful life; In case potentiometer in use weares and teares, cause resistance value to change, the inaccurate phenomenon of platform will appear transferring; Certainly, can use long-life potentiometer to solve this problem, but can increase cost so again; Deviate from mutually with the original intention that reduces cost, so also do not solve the high problem of PVC electric capacity cost fully.In addition, use potentiometer 49 conducts to transfer the platform device not solve the problem in the afterwards stable preservation radio station of outage.
Summary of the invention
The present invention provides a kind of and is used for the accent platform of radio reception machine chip and deposits table apparatus and method, in order to be implemented in the medium and low frequency receiver, reduces the BOM cost, after outage, stably preserves the radio station.
The present invention provides a kind of and is used for the accent platform of radio reception machine chip and deposits table apparatus, and said radio reception machine chip comprises:
Frequency synthesizer is used for according to current station information and reference frequency signal, generates first local oscillated signal and second local oscillated signal of quadrature;
Orthogonal mixer is used for the analog radio-frequency signal that receives is carried out mixing with said first local oscillated signal and said second local oscillated signal respectively, generates simulation Low Medium Frequency signal;
Analog to digital converter is used for said simulation Low Medium Frequency signal is converted into digital Low Medium Frequency signal;
Digital signal processor is used for said digital Low Medium Frequency signal is handled, and obtains digital audio and video signals; With
Digital to analog converter is used for said digital audio and video signals is converted into simulated audio signal;
Said device comprises logic encoder, logic encoder state machine, nonvolatile memory and communication interface main control unit, wherein,
Said logic encoder is used for rotation under the ordering about of external force, the output logic signal of telecommunication;
Said logic encoder state machine is used for when said logic encoder rotates; According to the historical station information and the said logic signal of telecommunication; Generate said current station information and master control write command; Said current station information is sent to said frequency synthesizer, said current station information and said master control write command is sent to said communication interface main control unit, and with said current station information as said historical station information;
Said communication interface main control unit is used for according to said master control write command; Said current station information is saved in the said nonvolatile memory as said historical station information; When said radio receiver chip power, read the said historical station information that is stored in the said nonvolatile memory and send to said logic encoder state machine;
Said logic encoder state machine also is used for when said radio receiver chip power, and the said historical station information that said communication interface main control unit is sent sends to said frequency synthesizer as said current station information.
The present invention also provides a kind of and is used for the accent platform of radio reception machine chip and deposits the platform method, and said radio reception machine chip comprises:
Frequency synthesizer is used for according to current station information and reference frequency signal, generates first local oscillated signal and second local oscillated signal of quadrature;
Orthogonal mixer is used for the analog radio-frequency signal that receives is carried out mixing with said first local oscillated signal and said second local oscillated signal respectively, generates simulation Low Medium Frequency signal;
Analog to digital converter is used for said simulation Low Medium Frequency signal is converted into digital Low Medium Frequency signal;
Digital signal processor is used for said digital Low Medium Frequency signal is handled, and obtains digital audio and video signals; With
Digital to analog converter is used for said digital audio and video signals is converted into simulated audio signal;
Said method comprises:
When the rotation logic encoder, the said logic encoder output logic signal of telecommunication;
When the said logic encoder of rotation; The logic encoder state machine is according to the historical station information and the said logic signal of telecommunication; Generate said current station information and master control write command; Said current station information is sent to frequency synthesizer, said current station information and said master control write command is sent to the communication interface main control unit, and with said current station information as said historical station information;
Said communication interface main control unit is saved in said current station information in the nonvolatile memory as said historical station information according to said master control write command;
When said radio receiver chip power, said communication interface main control unit reads and is stored in the said historical station information in the said nonvolatile memory and sends to said logic encoder state machine;
Said logic encoder state machine sends to frequency synthesizer with the said historical station information that said communication interface main control unit sends as said current station information.
The present invention adopts frequency synthesizer to generate local oscillated signal, and the image frequency inhibit feature realizes in DSP, need before mixing, not carry out image frequency and suppress, and therefore can save two PVC capacitors, has reduced the BOM cost.In addition, in the present embodiment, when logic encoder rotates; The logic encoder formation logic signal of telecommunication; The logic encoder state machine generates current station information according to the logic signal of telecommunication and historical station information, and frequency synthesizer is according to current station information and reference frequency signal; Change the frequency of local oscillated signal, thereby accomplished the function in adjustment radio station.In addition; After the logic encoder state machine generated current station information, the interface main control unit was saved in current station information in the nonvolatile memory, made that what store in the nonvolatile memory is up-to-date station information forever; When the radio receiver chip power; The station information that the communication interface main control unit will be stored in the nonvolatile memory again sends to the logic encoder state machine, and the logic encoder state machine sends to frequency synthesizer with this station information as current station information, and frequency synthesizer generates local oscillated signal according to current station information again; After the outage of radio reception machine chip; Even variation has taken place the state of logic encoder, the station information of preserving in the nonvolatile memory can not become yet, after the radio reception machine chip powers on once more; Still can make the radio reception machine chip still can return to outage radio station before, thus the function that has realized depositing platform.
Description of drawings
Fig. 1 is the structured flowchart of superheterodyne in the prior art;
Fig. 2 is the structural representation of local oscillator in the structured flowchart shown in Figure 1 in the prior art;
Fig. 3 is the structural representation of image frequency rejects trap in the structured flowchart shown in Figure 1 in the prior art;
Fig. 4 is the wireless structural representation of Low Medium Frequency in the prior art;
Fig. 5 is the structural representation of structural representation medium frequency synthesizer shown in Figure 4 in the prior art;
Fig. 6 is used for the accent platform and the structural representation of depositing table apparatus embodiment of radio reception machine chip for the present invention;
A kind of waveform sketch map of output when Fig. 7 A is used for the accent platform of radio reception machine chip and deposits table apparatus embodiment logic encoder turning clockwise for the present invention;
A kind of waveform sketch map of output when Fig. 7 B is used for the accent platform of radio reception machine chip and deposits table apparatus embodiment logic encoder being rotated counterclockwise for the present invention;
The another kind of waveform sketch map of output when Fig. 8 A is used for the accent platform of radio reception machine chip and deposits table apparatus embodiment logic encoder turning clockwise for the present invention;
The another kind of waveform sketch map of output when Fig. 8 B is used for the accent platform of radio reception machine chip and deposits table apparatus embodiment logic encoder being rotated counterclockwise for the present invention;
Another waveform sketch map of output when Fig. 9 A is used for the accent platform of radio reception machine chip and deposits table apparatus embodiment logic encoder turning clockwise for the present invention;
Another waveform sketch map of output when Fig. 9 B is used for the accent platform of radio reception machine chip and deposits table apparatus embodiment logic encoder being rotated counterclockwise for the present invention;
Another waveform sketch map of output when Figure 10 A is used for the accent platform of radio reception machine chip and deposits table apparatus embodiment logic encoder turning clockwise for the present invention;
Another waveform sketch map of output when Figure 10 B is used for the accent platform of radio reception machine chip and deposits table apparatus embodiment logic encoder being rotated counterclockwise for the present invention;
A kind of waveform sketch map of output when Figure 11 A is used for the accent platform of radio reception machine chip for the present invention and deposits table apparatus embodiment logic encoder turning clockwise the first step and second step;
A kind of waveform sketch map of output when Figure 11 B is used for the accent platform of radio reception machine chip for the present invention and deposits table apparatus embodiment logic encoder being rotated counterclockwise the first step and second step;
The another kind half impulse waveform sketch map of output when Figure 12 A is used for the accent platform of radio reception machine chip for the present invention and deposits table apparatus embodiment logic encoder turning clockwise the first step and second step;
The another kind half impulse waveform sketch map of output when Figure 12 B is used for the accent platform of radio reception machine chip for the present invention and deposits table apparatus embodiment logic encoder being rotated counterclockwise the first step and second step;
Another half impulse waveform sketch map of output when Figure 13 A is used for the accent platform of radio reception machine chip and deposits table apparatus embodiment logic encoder turning clockwise for the present invention;
Another half impulse waveform sketch map of output when Figure 13 B is used for the accent platform of radio reception machine chip and deposits table apparatus embodiment logic encoder being rotated counterclockwise for the present invention;
Another half impulse waveform sketch map of output when Figure 14 A is used for the accent platform of radio reception machine chip and deposits table apparatus embodiment logic encoder turning clockwise for the present invention;
Another half impulse waveform sketch map of output when Figure 14 B is used for the accent platform of radio reception machine chip and deposits table apparatus embodiment logic encoder being rotated counterclockwise for the present invention;
Figure 15 is used for the accent platform and the schematic flow sheet of depositing platform method embodiment of radio reception machine chip for the present invention.
Embodiment
Below in conjunction with Figure of description and embodiment the present invention is done further description.
As shown in Figure 6; The accent platform and the structural representation of depositing table apparatus embodiment that are used for the radio reception machine chip for the present invention; The structure of the radio reception machine chip that present embodiment adopted remains the structure of Low Medium Frequency; This radio reception machine chip can comprise frequency synthesizer 42, orthogonal mixer 43, analog to digital converter 44, DSP 45 and digital to analog converter 46, and orthogonal mixer 43 is connected with frequency synthesizer 42, and analog to digital converter 44 is connected with orthogonal mixer 43; DSP 45 is connected with analog to digital converter 44, and digital to analog converter 46 is connected with DSP 45.
Wherein, frequency synthesizer 42 is used for according to current station information and reference frequency signal, generates first local oscillated signal and second local oscillated signal of quadrature; Orthogonal mixer 43 is used for the analog radio-frequency signal that receives is carried out mixing with first local oscillated signal and second local oscillated signal respectively, generates simulation Low Medium Frequency signal, and this simulation Low Medium Frequency signal comprises I road and Q road; Analog to digital converter 44 is used for simulation Low Medium Frequency signal is converted into digital Low Medium Frequency signal; DSP 45 is used for digital Low Medium Frequency signal is handled, and obtains digital audio and video signals; Digital to analog converter 46 is used for digital audio and video signals is converted into simulated audio signal.What in DSP 45, mainly carry out is the Audio Processing after image frequency inhibition, frequency-selective filtering, FM or AM demodulation are transferred.
Again referring to Fig. 6; This accent platform with deposit table apparatus and can comprise logic encoder 61, logic encoder state machine 62, communication interface main control unit 63 and nonvolatile memory 64; Logic encoder 61 is connected with logic encoder state machine 62; Logic encoder state machine 62 is connected with communication interface main control unit 63 with frequency synthesizer 42 respectively, and communication interface main control unit 63 is connected with nonvolatile memory 64.Logic encoder 61 has two output pins: pin A and pin B.Nonvolatile memory 64 includes but not limited to EEPROM, FLASH memory etc.
In the present embodiment, logic encoder state machine 62 is integrated in the radio reception machine chip.Communication interface main control unit 63 is integrated in the radio reception machine chip.Nonvolatile memory 64 separates with the radio reception machine chip.Communication interface main control unit 63 is the serial line interface main control unit.
Alternatively, logic encoder state machine 62 can separate with the radio reception machine chip.Communication interface main control unit 63 can separate with the radio reception machine chip.Nonvolatile memory 64 can be integrated in the radio reception machine chip.The communication interface main control unit is the parallel interface main control unit.
Wherein, logic encoder 61 is used for when rotation under the ordering about of external force, the output logic signal of telecommunication; Logic encoder state machine 62 is used for when logic encoder 61 rotations; According to the historical station information and the logic signal of telecommunication; Generate current station information and master control write command; Current station information is sent to frequency synthesizer 42, current station information and master control write command is sent to communication interface main control unit 63, and with current station information as historical station information; Communication interface main control unit 63 is used for according to the master control write command; Current station information is saved in the nonvolatile memory 64 as historical station information; When the radio receiver chip power, read and be stored in the historical station information in the nonvolatile memory 64 and send to logic encoder state machine 62.Logic encoder state machine 62 also is used for when the radio receiver chip power, and the historical station information that communication interface main control unit 63 is sent sends to frequency synthesizer 42 as current station information.
The course of work of present embodiment is following: when logic encoder 61 rotates under the ordering about of external force; The logic encoder 61 output logic signals of telecommunication; Logic encoder state machine 62 generates current station information and master control write command according to the historical station information and the logic signal of telecommunication then, and current station information is sent to frequency synthesizer 42; Frequency synthesizer 42 generates local oscillated signal according to this current station information; Simultaneously, logic encoder state machine 62 sends to communication interface main control unit 63 with current station information and master control write command, and with current station information as historical station information; Communication interface main control unit 63 is saved in current station information in the nonvolatile memory 64 as historical station information according to the master control write command.When the radio receiver chip power; Communication interface main control unit 63 reads and is stored in the historical station information in the nonvolatile memory 64 and sends to logic encoder state machine 62; Logic encoder state machine 62 sends to frequency synthesizer 42 with the historical station information that communication interface main control unit 63 sends as current station information then; Frequency synthesizer 42 generates local oscillated signal according to this current station information again, and frequency synthesizer 42 generates first local oscillated signal and second local oscillated signal of quadrature according to current station information and reference frequency signal; Orthogonal mixer 43 carries out mixing with first local oscillated signal and second local oscillated signal respectively with the analog radio-frequency signal that receives; Generate simulation Low Medium Frequency signal, analog to digital converter 44 will be simulated the Low Medium Frequency signal and will be converted into digital Low Medium Frequency signal, and 45 pairs of digital Low Medium Frequency signals of DSP are handled; Obtain digital audio and video signals, digital to analog converter 46 is converted into simulated audio signal with digital audio and video signals.
The logic signal of telecommunication of logic encoder 61 output is the logic level that changes, different according to the difference of its kind and circuit connecting, and the output of logic encoder 61 has a variety of forms.Shown in Fig. 7 A, a kind of waveform sketch map of output when being used for the accent platform of radio reception machine chip and depositing table apparatus embodiment logic encoder turning clockwise for the present invention is shown in Fig. 7 B; A kind of waveform sketch map of output when being used for the accent platform of radio reception machine chip and depositing table apparatus embodiment logic encoder being rotated counterclockwise for the present invention, under the normal condition, logic encoder 61 is output as high level; When logic encoder 61 clockwise directions rotate, pin B meeting first ground connection, pin A ground connection subsequently; Continue rotation forward; Pin B separates with ground earlier, and pin A separates with ground then, will produce the waveform shown in Fig. 7 A like this.Otherwise, when logic encoder 61 counterclockwise rotates, the first ground connection of pin A meeting, the ground connection of pin B meeting is subsequently continued rotation forward, and pin A separates with ground earlier, and pin B separates with ground subsequently, will produce the waveform shown in Fig. 7 B like this.Be without loss of generality; When using; Logic encoder state machine 62 can be with the instruction of waveform shown in Fig. 7 A as the channel increase, and instruction and historical station information according to this channel increases increase a channel on the basis of the channel of before rotation logic encoder 61, being listened to; With the instruction that waveform shown in Fig. 7 B reduces as channel, instruction and historical station information according to this channel reduces reduce a channel on the basis of the channel of before rotation logic encoder 61, being listened to.
To introduce logic encoder state machine 62 below and how discern waveform shown in Fig. 7 A and Fig. 7 B.Again referring to waveform shown in Fig. 7 A; Logic encoder state machine 62 is according to the logic level of pin A and pin B output, when monitoring logic level that pin A and pin B export according to following state variation: S1 (A=1, B=0) → S2 (A=0; B=0) → S3 (A=0; B=1) → and S4 (A=1, B=1), logic encoder state machine 62 increases waveform shown in Fig. 7 A as channel instruction.Again referring to waveform shown in Fig. 7 B; The logic level that logic encoder state machine 62 monitors pin A and pin B output is during according to following state variation: S3 (A=0; B=1) → and S2 (A=0, B=0) → S1 (A=1, B=0) → S4 (A=1; B=1), logic encoder state machine 62 is with the instruction of waveform shown in Fig. 7 A as the channel reduction.Logic encoder state machine 62 will be regarded as invalid waveform except that other waveforms the waveform shown in Fig. 7 A and Fig. 7 B, neither increase channel, also not reduce channel.
The output waveform of the logic encoder that present embodiment adopted is a kind of in numerous logic encoders, and different according to the structure of logic encoder and peripheral circuit can have a variety of other output waveforms.Shown in Fig. 8 A; The another kind of waveform sketch map of output when being used for the accent platform of radio reception machine chip and depositing table apparatus embodiment logic encoder turning clockwise for the present invention; Shown in Fig. 8 B; The another kind of waveform sketch map of output when being used for the accent platform of radio reception machine chip and depositing table apparatus embodiment logic encoder being rotated counterclockwise for the present invention; When waveform shown in logic encoder 61 difference output map 8A and Fig. 8 B, logic encoder state machine 62 increases waveform shown in Fig. 8 A as channel instruction is with the instruction of waveform shown in Fig. 8 B as the channel reduction.Shown in Fig. 9 A; Another waveform sketch map of output when being used for the accent platform of radio reception machine chip and depositing table apparatus embodiment logic encoder turning clockwise for the present invention; Shown in Fig. 9 B; Another waveform sketch map of output when being used for the accent platform of radio reception machine chip and depositing table apparatus embodiment logic encoder being rotated counterclockwise for the present invention; When waveform shown in logic encoder 61 difference output map 9A and Fig. 9 B, logic encoder state machine 62 increases waveform shown in Fig. 9 A as channel instruction is with the instruction of waveform shown in Fig. 9 B as the channel reduction.Shown in Figure 10 A; Another waveform sketch map of output when being used for the accent platform of radio reception machine chip and depositing table apparatus embodiment logic encoder turning clockwise for the present invention; Shown in Figure 10 B; Another waveform sketch map of output when being used for the accent platform of radio reception machine chip and depositing table apparatus embodiment logic encoder being rotated counterclockwise for the present invention; When waveform shown in logic encoder 61 difference output map 10A and Figure 10 B, logic encoder state machine 62 increases waveform shown in Figure 10 A as channel instruction is with the instruction of waveform shown in Figure 10 B as the channel reduction.
Fig. 7 A, 7B-Figure 10 A, the employed logic encoder of 10B are the overall pulse encoders, that is, one step of logic encoder rotation produces a complete pulse signal; In addition; Also have a kind of half pulse coder, that is, and the variation that one step of rotation produces a high-low level; Second step of rotation produces the inverse change of a level, and two steps of corotation commentaries on classics produce a complete pulse signal.Logic encoder state machine 62 can rotate the direction of rotation of the complete pulse signal decision logic encoder of two steps back generation according to logic encoder.Shown in Figure 11 A; A kind of waveform sketch map of output when being used for the accent platform of radio reception machine chip and depositing table apparatus embodiment logic encoder turning clockwise the first step and second step for the present invention; Shown in Figure 11 B, a kind of waveform sketch map of output when being used for the accent platform of radio reception machine chip and depositing table apparatus embodiment logic encoder being rotated counterclockwise the first step and second step for the present invention.Referring to waveform shown in Figure 11 A, when the logic level of logic encoder state machine 62, when monitoring logic level that pin A and pin B export: S1 (A=1 according to following state variation according to pin A and pin B output; B=0) → S2 (A=0; B=0) → and S2 (A=0, B=0) → S3 (A=0, B=1) → S4 (A=1; B=1), logic encoder state machine 62 is with the instruction of waveform shown in Figure 11 A as the channel increase.Referring to waveform shown in Figure 11 B; The logic level that logic encoder state machine 62 monitors pin A and pin B output is during according to following state variation: and S3 (A=0, B=1) → S2 (A=0, B=0) → S2 (A=0; B=0) → S1 (A=1; B=0) → and S4 (A=1, B=1), logic encoder state machine 62 reduces waveform shown in Fig. 7 A as channel instruction.Logic encoder state machine 62 will be regarded as invalid waveform except that other waveforms the waveform shown in Figure 11 A and Figure 11 B, neither increase channel, also not reduce channel.Alternatively, logic encoder state machine 62 also can rotate the direction of rotation of the waveform decision logic encoder that produces after the first step according to logic encoder, and then definite channel increases or reduces.
In addition, different according to the structure of logic encoder and peripheral circuit, logic encoder can be exported a variety of other half impulse waveforms.Shown in Figure 12 A; The another kind half impulse waveform sketch map of output when being used for the accent platform of radio reception machine chip and depositing table apparatus embodiment logic encoder turning clockwise the first step and second step for the present invention; Shown in Figure 12 B; The another kind half impulse waveform sketch map of output when being used for the accent platform of radio reception machine chip and depositing table apparatus embodiment logic encoder being rotated counterclockwise the first step and second step for the present invention; When waveform shown in logic encoder 61 difference output map 12A and Figure 12 B, logic encoder state machine 62 increases waveform shown in Figure 12 A as channel instruction is with the instruction of waveform shown in Figure 12 B as the channel reduction.Shown in Figure 13 A; Another half impulse waveform sketch map of output when being used for the accent platform of radio reception machine chip and depositing table apparatus embodiment logic encoder turning clockwise for the present invention; Shown in Figure 13 B; Another half impulse waveform sketch map of output when being used for the accent platform of radio reception machine chip and depositing table apparatus embodiment logic encoder being rotated counterclockwise for the present invention; When waveform shown in logic encoder 61 difference output map 13A and Figure 13 B, logic encoder state machine 62 increases waveform shown in Figure 13 A as channel instruction is with the instruction of waveform shown in Figure 13 B as the channel reduction.Shown in Figure 14 A; Another half impulse waveform sketch map of output when being used for the accent platform of radio reception machine chip and depositing table apparatus embodiment logic encoder turning clockwise for the present invention; Shown in Figure 14 B; Another half impulse waveform sketch map of output when being used for the accent platform of radio reception machine chip and depositing table apparatus embodiment logic encoder being rotated counterclockwise for the present invention; When waveform shown in logic encoder 61 difference output map 14A and Figure 14 B, logic encoder state machine 62 increases waveform shown in Figure 14 A as channel instruction is with the instruction of waveform shown in Figure 14 B as the channel reduction.
Present embodiment adopts frequency synthesizer to generate local oscillated signal, and the image frequency inhibit feature realizes in DSP, need before mixing, not carry out image frequency and suppress, and therefore can save two PVC capacitors, has reduced the BOM cost.In addition, in the present embodiment, when logic encoder rotates; The logic encoder formation logic signal of telecommunication; The logic encoder state machine generates current station information according to the logic signal of telecommunication and historical station information, and frequency synthesizer is according to current station information and reference frequency signal; Change the frequency of local oscillated signal, thereby accomplished the function in adjustment radio station.In addition; After the logic encoder state machine generated current station information, the interface main control unit was saved in current station information in the nonvolatile memory, made that what store in the nonvolatile memory is up-to-date station information forever; When the radio receiver chip power; The station information that the communication interface main control unit will be stored in the nonvolatile memory again sends to the logic encoder state machine, and the logic encoder state machine sends to frequency synthesizer with this station information as current station information, and frequency synthesizer generates local oscillated signal according to current station information again; After the outage of radio reception machine chip; Even variation has taken place the state of logic encoder, the station information of preserving in the nonvolatile memory can not become yet, after the radio reception machine chip powers on once more; Still can make the radio reception machine chip still can return to outage radio station before, thus the function that has realized depositing platform.
Shown in figure 15; The accent platform and the schematic flow sheet of depositing platform method embodiment that are used for the radio reception machine chip for the present invention; Wherein, the structure of this radio reception machine chip is identical with radio reception machine chip among Fig. 6, and this method embodiment can comprise the steps:
Step 1501, when rotation during logic encoder, the logic encoder output logic signal of telecommunication;
Step 1502, when rotation during logic encoder; The logic encoder state machine is according to the historical station information and the logic signal of telecommunication; Generate current station information and master control write command; Current station information is sent to frequency synthesizer, current station information and master control write command is sent to the communication interface main control unit, and with current station information as historical station information;
Step 1503, communication interface main control unit are saved in the nonvolatile memory current station information as historical station information according to the master control write command;
Wherein, nonvolatile memory 64 includes but not limited to EEPROM, FLASH memory etc.;
Step 1504, when the radio receiver chip power, the communication interface main control unit reads and is stored in the historical station information in the nonvolatile memory and sends to the logic encoder state machine;
Step 1505, logic encoder state machine send to frequency synthesizer with the historical station information that the communication interface main control unit sends as current station information;
Frequency synthesizer is according to current station information and reference frequency signal then; Generate first local oscillated signal and second local oscillated signal of quadrature; Frequency mixer carries out mixing with first local oscillated signal and second local oscillated signal respectively with the analog radio-frequency signal that receives; Generate simulation Low Medium Frequency signal, analog to digital converter will be simulated the Low Medium Frequency signal and will be converted into digital Low Medium Frequency signal, and 45 pairs of digital Low Medium Frequency signals of DSP are handled; Obtain digital audio and video signals, digital to analog converter 46 is converted into simulated audio signal with digital audio and video signals.
Wherein, the annexation of logic encoder, logic encoder state machine, communication interface main control unit and nonvolatile memory can repeat no more at this referring to structural representation shown in Figure 6.
In the present embodiment, the logic encoder state machine is integrated in the radio reception machine chip.The communication interface main control unit is integrated in the radio reception machine chip.Nonvolatile memory separates with the radio reception machine chip.The communication interface main control unit is the serial line interface main control unit.
Alternatively, the logic encoder state machine can separate with the radio reception machine chip.Communication interface main control unit 63 can separate with the radio reception machine chip.Nonvolatile memory 64 can be integrated in the radio reception machine chip.The communication interface main control unit is the parallel interface main control unit.
In the present embodiment, frequency synthesizer generates local oscillated signal, and the image frequency inhibit feature realizes in DSP, need before mixing, not carry out image frequency and suppress, and therefore can save two PVC capacitors, has reduced the BOM cost.In addition, in the present embodiment, when logic encoder rotates; The logic encoder formation logic signal of telecommunication; The logic encoder state machine generates current station information according to the logic signal of telecommunication and historical station information, and frequency synthesizer is according to current station information and reference frequency signal; Change the frequency of local oscillated signal, thereby accomplished the function in adjustment radio station.In addition; After the logic encoder state machine generated current station information, the interface main control unit was saved in current station information in the nonvolatile memory, made that what store in the nonvolatile memory is up-to-date station information forever; When the radio receiver chip power; The station information that the communication interface main control unit will be stored in the nonvolatile memory again sends to the logic encoder state machine, and the logic encoder state machine sends to frequency synthesizer with this station information as current station information, and frequency synthesizer generates local oscillated signal according to current station information again; After the outage of radio reception machine chip; Even variation has taken place the state of logic encoder, the station information of preserving in the nonvolatile memory can not become yet, after the radio reception machine chip powers on once more; Still can make the radio reception machine chip return to outage radio station before, thus the function that has realized depositing platform.
What should explain at last is: above embodiment is only unrestricted in order to technical scheme of the present invention to be described; Although the present invention is specified with reference to preferred embodiment; Those of ordinary skill in the art is to be understood that; Can make amendment or be equal to replacement technical scheme of the present invention, and not break away from the spirit and the scope of technical scheme of the present invention.
Claims (10)
1. one kind is used for the accent platform of radio reception machine chip and deposits table apparatus, and said radio reception machine chip comprises:
Frequency synthesizer is used for according to current station information and reference frequency signal, generates first local oscillated signal and second local oscillated signal of quadrature;
Orthogonal mixer is used for the analog radio-frequency signal that receives is carried out mixing with said first local oscillated signal and said second local oscillated signal respectively, generates simulation Low Medium Frequency signal;
Analog to digital converter is used for said simulation Low Medium Frequency signal is converted into digital Low Medium Frequency signal;
Digital signal processor is used for said digital Low Medium Frequency signal is handled, and obtains digital audio and video signals; With
Digital to analog converter is used for said digital audio and video signals is converted into simulated audio signal;
It is characterized in that said device comprises logic encoder, logic encoder state machine, nonvolatile memory and communication interface main control unit, wherein,
Said logic encoder is used for rotation under the ordering about of external force, the output logic signal of telecommunication;
Said logic encoder state machine is used for when said logic encoder rotates; According to the historical station information and the said logic signal of telecommunication; Generate said current station information and master control write command; Said current station information is sent to said frequency synthesizer, said current station information and said master control write command is sent to said communication interface main control unit, and with said current station information as said historical station information;
Said communication interface main control unit is used for according to said master control write command; Said current station information is saved in the said nonvolatile memory as said historical station information; When said radio receiver chip power, read the said historical station information that is stored in the said nonvolatile memory and send to said logic encoder state machine;
Said logic encoder state machine also is used for when said radio receiver chip power, and the said historical station information that said communication interface main control unit is sent sends to said frequency synthesizer as said current station information.
2. device according to claim 1 is characterized in that, said non volatile memory bits is in said radio receiver chip exterior or be integrated in the said radio reception machine chip.
3. device according to claim 1 is characterized in that, said logic encoder state machine is integrated in the said radio reception machine chip.
4. device according to claim 1 is characterized in that, said communication interface main control unit is integrated in the said radio reception machine chip.
5. device according to claim 1 is characterized in that, said communication interface main control unit is the serial line interface main control unit.
6. one kind is used for the accent platform of radio reception machine chip and deposits the platform method, and said radio reception machine chip comprises:
Frequency synthesizer is used for according to current station information and reference frequency signal, generates first local oscillated signal and second local oscillated signal of quadrature;
Orthogonal mixer is used for the analog radio-frequency signal that receives is carried out mixing with said first local oscillated signal and said second local oscillated signal respectively, generates simulation Low Medium Frequency signal;
Analog to digital converter is used for said simulation Low Medium Frequency signal is converted into digital Low Medium Frequency signal;
Digital signal processor is used for said digital Low Medium Frequency signal is handled, and obtains digital audio and video signals; With
Digital to analog converter is used for said digital audio and video signals is converted into simulated audio signal;
It is characterized in that said method comprises:
When the rotation logic encoder, the said logic encoder output logic signal of telecommunication;
When the said logic encoder of rotation; The logic encoder state machine is according to the historical station information and the said logic signal of telecommunication; Generate said current station information and master control write command; Said current station information is sent to frequency synthesizer, said current station information and said master control write command is sent to the communication interface main control unit, and with said current station information as said historical station information;
Said communication interface main control unit is saved in said current station information in the nonvolatile memory as said historical station information according to said master control write command;
When said radio receiver chip power, said communication interface main control unit reads and is stored in the said historical station information in the said nonvolatile memory and sends to said logic encoder state machine;
Said logic encoder state machine sends to frequency synthesizer with the said historical station information that said communication interface main control unit sends as said current station information.
7. method according to claim 6 is characterized in that, said non volatile memory bits is in said radio receiver chip exterior or be integrated in the said radio reception machine chip.
8. method according to claim 6 is characterized in that, said logic encoder state machine is integrated in the said radio reception machine chip.
9. method according to claim 6 is characterized in that, said communication interface main control unit is integrated in the said radio reception machine chip.
10. method according to claim 6 is characterized in that, said communication interface main control unit is the serial line interface main control unit.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103346812A (en) * | 2013-07-01 | 2013-10-09 | 北京昆腾微电子有限公司 | Channel switching method and device of audio receiving chip and audio receiving machine |
| CN108873763A (en) * | 2017-05-11 | 2018-11-23 | 佛山市顺德区美的电热电器制造有限公司 | Operating mode adjusting method, device and equipment |
| CN109445329A (en) * | 2018-10-22 | 2019-03-08 | 四川虹美智能科技有限公司 | A kind of refrigerator functions selection system and method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060045126A1 (en) * | 2004-08-30 | 2006-03-02 | Interdigital Technology Corporation | Method and apparatus for adaptively selecting sampling frequency for analog-to-digital conversion |
| CN201422113Y (en) * | 2009-04-17 | 2010-03-10 | 捷顶微电子（上海）有限公司 | Frequency modulation radio system |
| CN101738212A (en) * | 2009-06-17 | 2010-06-16 | 东莞市长泰尔电子有限公司 | Encoder |
| CN101777929A (en) * | 2009-12-29 | 2010-07-14 | 清华大学深圳研究生院 | Ultra wide band receiver for realizing down frequency mixing based on nonlinear preprocessing |
| CN101908896A (en) * | 2009-06-03 | 2010-12-08 | 中国科学院微电子研究所 | Multi-frequency band radio-frequency receiver |
| CN201698765U (en) * | 2010-06-03 | 2011-01-05 | 襄樊群龙汽车部件有限公司 | Vehicle-mounted digital MP3 radio-cassette player |
-
2011
- 2011-09-30 CN CN2011103019701A patent/CN102355274A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060045126A1 (en) * | 2004-08-30 | 2006-03-02 | Interdigital Technology Corporation | Method and apparatus for adaptively selecting sampling frequency for analog-to-digital conversion |
| CN201422113Y (en) * | 2009-04-17 | 2010-03-10 | 捷顶微电子（上海）有限公司 | Frequency modulation radio system |
| CN101908896A (en) * | 2009-06-03 | 2010-12-08 | 中国科学院微电子研究所 | Multi-frequency band radio-frequency receiver |
| CN101738212A (en) * | 2009-06-17 | 2010-06-16 | 东莞市长泰尔电子有限公司 | Encoder |
| CN101777929A (en) * | 2009-12-29 | 2010-07-14 | 清华大学深圳研究生院 | Ultra wide band receiver for realizing down frequency mixing based on nonlinear preprocessing |
| CN201698765U (en) * | 2010-06-03 | 2011-01-05 | 襄樊群龙汽车部件有限公司 | Vehicle-mounted digital MP3 radio-cassette player |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103346812A (en) * | 2013-07-01 | 2013-10-09 | 北京昆腾微电子有限公司 | Channel switching method and device of audio receiving chip and audio receiving machine |
| CN103346812B (en) * | 2013-07-01 | 2015-11-25 | 昆腾微电子股份有限公司 | The tune platform method and apparatus of audio frequency receiving chip and voice receiver |
| CN108873763A (en) * | 2017-05-11 | 2018-11-23 | 佛山市顺德区美的电热电器制造有限公司 | Operating mode adjusting method, device and equipment |
| CN109445329A (en) * | 2018-10-22 | 2019-03-08 | 四川虹美智能科技有限公司 | A kind of refrigerator functions selection system and method |
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Application publication date: 20120215 |