CN2672982Y - Radio fixed telephone module and telephone set - Google Patents
Radio fixed telephone module and telephone set Download PDFInfo
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- CN2672982Y CN2672982Y CN 200320121189 CN200320121189U CN2672982Y CN 2672982 Y CN2672982 Y CN 2672982Y CN 200320121189 CN200320121189 CN 200320121189 CN 200320121189 U CN200320121189 U CN 200320121189U CN 2672982 Y CN2672982 Y CN 2672982Y
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Abstract
The utility model discloses a radio fixed telephone module, comprising a radio frequency emitting and receiving circuit, a central controller, a memory, an electric source management circuit, a speech sound channel circuit, a user identification module and a LCD display circuit. Wherein, the radio frequency emitting and receiving circuit is connected with the central controller. The central controller is connected with the speech sound channel circuit, the user identification module circuit and the LCD display circuit. An audio signal interface, a serial communication interface, a button interface, an LCD display interface, a user identification interface and a power circuit interface form the user interface which is connected with the external connection circuit through a plate to plate connector. The user interface of the radio fixed telephone module is connected with a keyboard, an LCD display, an external power supply, a UIM card, a microphone and a receiver, composing a radio fixed telephone. The utility model has the advantages of wireless access, flexible arranging points and no need to lay special line.
Description
Technical field
The utility model belongs to the mobile communication technology field, more particularly relates to the cellular phone equipment based on cdma system.
Background technology
At present fixing wired telephone penetration rate height, technology maturation is stable, and is easy to use, but fixedly there is the shortcoming that some inconvenience are used in telephone, such as for telephone operator, carry out that fixing wired telephone service need pick up, pipe laying and backguy, infusion of financial resources is many, operating rate is slow, for the user, when the address is changed in the resettlement of office or dwelling house, need go to telecommunication bureau to handle telephone-moving and change number, delay and influence the operating time.And fixedly telephone can not be used on such as automobile, steamer at some inconvenient stringings or ground line no show place or region such as suburb, lake, island, rural area and mobile vehicle.Fixedly telephone lacks the communication of data message based on voice service.
Summary of the invention
The purpose of this utility model, promptly be in order to satisfy the needs of the communications field, to provide a kind of and can finish speech, data communication, and be connected with external system by serial communication interface, realize the cellular phone module based on CDMA 1X system of multiple expanded function
On cellular phone module user interface, connect keyboard, LCD demonstration, external power supply, UIM card, Mike and receiver, form the cellular phone machine, not only possess the communication function commonly used of fixed telephone, and loaded the data communication characteristics of mobile communication.The cellular phone machine because its wireless access, set up an office flexible, easy for installation, need not to lay special circuit, be convenient to characteristics such as adjustments, be particularly suitable for some and insert on the mobile class carriers such as difficult car, ship because of area and permanent circuit circuit that geographical or other reason are not suitable for installing and fixing the phone circuit.
In order to achieve the above object, the utility model comprises radio-frequency transmissions and receiving circuit, central controller and memory, electric power management circuit, voice channel circuit, subscriber identification module, the LCD display circuit, wherein radio frequency reception and radiating circuit are connected with central controller, central controller connects voice channel circuit, user identification module circuit and LCD display circuit, audio signal interface, serial communication interface, keystroke interface, the LCD display interface, User Recognition interface and power circuit interface are formed user interface, are connected with external circuits by board to board connector.
Described central controller adopts the MSM6000 chip, and memory adopts the integrated circuit of FLASH+PSRAM structure.
Described power circuit comprises charge management circuit, can charge to reserve battery, realizes the dual power supply of civil power and battery.
The cellular phone module is installed on the pcb board, and pcb board outer cover radome is to ensure good RF and EMC Electro Magnetic Compatibility.
On cellular phone module user interface, connect keyboard, LCD demonstration, external power supply, UIM card, Mike and receiver, form the cellular phone machine, the central controller of described module adopts the MSM6000 chip, memory adopts the integrated circuit of FLASH+PSRAM structure, power circuit comprises charge management circuit, described module is installed on the pcb board, pcb board outer cover radome.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further described.
Fig. 1 is a circuit block diagram of the present utility model.
Fig. 2 is its circuit theory diagrams.
Embodiment
The cellular phone module is installed on the pcb board 6, pcb board 6 outer cover radomes.
The circuit description of embodiment 1 cellular phone module is as follows.
Radio frequency receives the major function of finishing with radiating circuit 1: the base band CDMA signal of backward channel is launched from antenna end with 824MHz～849MHz by the radiating circuit modulating transformation; The wireless signal of the base station of 869MHz～894MHz that antenna end is received obtains forward channel base band CDMA signal by the demodulation process of receiving circuit; Stable controlled 19.2MHz frequency source is provided simultaneously.This circuit can be divided into 5 subelements according to function
1.1 antenna element 101
Form by antenna module, duplexer, duplexer.
Antenna module is the R-T unit of wireless signal, and this module is by the antenna solder joint external antenna assembly on the pcb board, and duplexer is used for the mechanical switch of test automatically, is positioned at the radio-frequency channel, connects with the sky line parallel, reduces 0.5d loss in the actual use.During production test and test cable connect.
Duplexer is divided into signal reception and sends part.Duplexer will be received and dispatched the radiofrequency signal isolation, and minimizing influences each other.Tx port: 824～849MHz inserts loss=2.6dB, Tx to the Rx channel attenuation greater than 43dB; Rx port: 869～894MHz inserts loss=4.0dB, and Rx decays greater than 56dB to the Tx transmission channel.
1.2 frequency synthesis unit 102
Comprise following circuit: voltage-controlled temperature compensated oscillator (VC-TCXO) 19.2MHz, voltage controlled oscillator VCO, filter circuit and the integrated LDO voltage adjuster of PM6000 power management chip provide constant low head voltage.
Frequency synthesizer passes through SBI serial bus control RFT6102 by MSM6000, built-in 1 TX PLL+TX VCO forms TX RF-LO local vibration source, the RF-LO local oscillator directly directly is modulated to radio frequency as the local oscillator input of transmitter unit upconverter, through amplifying, cushion output; Another RX PLL that RFT6102 is built-in in addition and RFR6002 and external VCO circuit are formed reception local oscillator loop, and radiofrequency signal is directly downconverted to baseband signal.The VREG_TCXO power supply that provides from PM6000 (power management chip), the 19.2MHz frequency source that VC-TCXO produces, one the tunnel offers RFT6102 does a reference source, and other one the tunnel provides RFR6002 to do a reference source, and other one the tunnel provides the clock source to MSM6000 after PM6000 buffering, filtering.
1.3 transmitter unit 103
Transmitter unit mainly is made up of following circuit: RFT6102, the radio-frequency filter of Tx RF-SAW, power amplifier RF6100 or CX77105, and burst mode/PA-ON control circuit and power-sensing circuit.
CDMA 1X signal outputs to RFT6102. for transmitting power control accurately from base band, the gain of MSM6000 output TX_AGC_ADJ PDM signal controlling.By the RC filter circuit, the PDM impulse wave realizes that dynamic range surpasses the gain controlling of 85dB.Output signal directly upconverts to 824MHz～849MHz through UHF_LO (1752MHz) mixing from analog baseband signal.Radio-frequency filter TXRF_SAW (836.5MHz+/-12.5MHz), output to power amplifier PAM, export duplexer after the amplification to.Duplexer has the isolation to receiving loop 55dB.
1.4 receiving element 104
The signal that receives from antenna, by duplexer filtering selective reception 869MHz～894MHz frequency band, duplexer has the launching circuit isolation of 56dB roughly, and duplexer inserts loss 2.2dB.After entering low noise amplifier RFL6000, low noise amplifier has the function that gain is switched, and when having in the frequency acceptance band when entering than high reject signal, gain reduces, thereby has weakened the distortion that back level produces.(the noise factor of 15.5dB gain controlling and 1.4dB.Received signal intensity is higher than-85dBm, and LNA carries out the height gain controlling, simultaneously the gain compensation of MSM6000 control LNA current offset and MSM chip.LNA outputs to RX RF_SAW, suppresses transmitter signal and the out of band signal of 40dB.Filter has the 25MHz bandwidth, centre frequency be 881.5+/-12.5MHz, output to RFR6000.RFR6000 supports the zero intermediate frequency technology, directly downconverts to baseband signal, generates I, Q two-way analog signal, enters the MSM6000 chip and carries out further demodulation.
1.5 RF control
The encoding and decoding and the inner 32-bit microprocessor of CDMA signal processing, sound are arranged among the CDMA signal processing controller MSM6000, mobile phone is all controlled with software.Control section comprises the processing of receiving and transmitting signal between mobile phone wireless RF control and base station and is connected to the control etc. of base band such as the coding of the control of mobile phone, voice signal, decoding.
1.5.1 FREQUENCY CONTROL
From the CDMA signal processing controller, detect the deviation of frequency according to the I signal of received signal, the phase changing capacity of Q signal, feed back to the PIN1 control voltage of VC-TCXO temperature compensating type crystal oscillator, control sensitivity: 87.5 to 175Hz/V, (control range of 0.5 to 2.5V); Phase noise :-100/-120/-130dBc/Hz is being biased to 100/1K/10KHz.Automatic frequency control (AFC) function that constitutes thus is a benchmark with the frequency of base station, and the frequency error of keeping mobile phone is within the scope of technical standard.
The switching of CDMA radio-frequency channel realizes that by transmitting-receiving RF-LO first local oscillator that is produced by the built-in frequency synthesizer of the RFT6102 of MSM6000 control adjacent channel spacing is 30kHz.Frequency synthesizer has the PLL lock detecting circuit, and by LD output lock-out state, high level is effective for locking;
1.5.2 transmitting power output control
In the radiating portion, intermediate frequency amplifies and the high frequency power amplifier section has adopted variable gain amplifier, guarantees necessary dynamic range, thereby realizes power control.Power control has the controlled function (closed power control) of carrying out based on the control BIT that comes from the base station, the controlled function (open Loop Power control) of carrying out according to the signal strength signal intensity of the base station that receives.Among this, the variation of the gain that linearity and temperature and the frequency of gain caused need carry out that RF adjusts and correction, and the compensating value that obtains is in advance stored with form, in the mode of tabling look-up it is carried out revisal by software.Also have by HDET (hardware power detection) and realize maximum transmit power limit.
1.5.3 receiving gain control
In the open Loop Power control, the power that correct measurement goes out the received signal of coming the base station is necessary, and relevant receiving unit is the same with radiating portion, and the gain of receiving circuit is carried out revisal by software with lookup table mode.LNA high-gain, evanescent mode are selected, and receive RFR6000 variable gain control (more than the dynamic range 90dB).
The digital baseband signal treatment circuit mainly contains central control and data processing unit, power supply power supply unit, sound processing unit, external interface unit are formed.
Central authorities' control comprises digital baseband process chip 2 and separates FLASH and PSRAM memory chip 3 with data processing unit.
Digital baseband process chip 2 adopts the MSM6000 of Qualcomm.Compatible CDMA-1X of MSM6000 and IS95A/B system.The MSM6000 subsystem comprises CDMA processor, digital audio amplifier, general A/D conversion, ARM7TDMI microprocessor, supports forward direction and reverse link 14.4K sync peaks data communication and high speed RS-232 interface.
MSM6000 carries out the Digital Signal Processing and the user software of base band.It is the central interface chip of User Part, and RF and baseband portion interface and signal are provided, the control of voicefrequency circuit, the interface of memory interface and user's request.
MSM6000 CDMA processor is carried out the digital modulation and demodulation system of 3G 1X CDMA IS2000 and AMPS completely.Modules such as modulation module comprises convolutional encoding, interweaves, quadrature modulation, direct sequence long code spread spectrum, baseband filtering finally provide i/q signal to RFT6102.Demodulation modules such as demodulation module comprises RAKE receiver, correlation demodulation, deinterleaves, Viterbi decoding finally offer vocoder digital audio signal and other peripheral hardware data message are provided.
Subscriber Interface Module SIM typically comprises button, LCD demonstration, ring, the control of RF power, FREQUENCY CONTROL, memory control etc.MSM6000 supports normal mode of operation and sleep pattern.Under normal mode, use the 19.2MHz clock frequency, under sleep pattern, use the 32.768KHz clock frequency.
It is the center that power circuit 4 adopts high pass PM6000 chip, cooperates voltage detecting circuit, voltage stabilizing circuit, on/off circuit etc. to form complete power-supplying circuit.The built-in efficient charging management chip of PM6000 is realized full-automatic charge function.
The operating state of power circuit part is as follows: when normal the use, with the suitable DC stable power supply power supply through the civil power conversion.After opening main power switch, power supply PM6000 starting provides power supply to each several part.The power supply of radio frequency part except that power amplifier (directly by the general supply power supply), is provided the power supply of voltage stabilizing by voltage stabilizing circuit.And, the ripple filter is set in the VCO circuit for the temperature compensating type crystal oscillator provides independently voltage stabilizing circuit, suppress the frequency change that the variation because of supply voltage causes.In addition, the built-in charge management circuit of module can charge to reserve battery., can power to complete machine when can not get civil power because of certain reason (as having a power failure) by battery.
The MIC1 of voice-grade channel employing MSM6000 and ear1 are as the handle portion passage, and AUXI and AUXO are as hands-free passage.The bias voltage of MIC is provided by MSM6000, finishes this by an analog switch and is biased in two switchings between the passage.
Liquid crystal display circuit: can support 128 * 96 dot matrix black-and-white crystal display modules, the interface by 60 pins picks out.The UIM card is directly provided by MSM6000.
This cellular phone module is by special-purpose data transaction cable, and the UART1 interface data in the module can carry out data communication with the serial line interface of PC.PC can insert this module by the RS232 interface, the work such as download that download of the visit internal data clauses and subclauses such as NV and the data of carrying out.
On cellular phone module user interface,, connect keyboard, LCD demonstration, external power supply, UIM card, Mike and receiver, form the cellular phone machine by the connector of one 60 pin.
Claims (10)
1. cellular phone module, comprise radio-frequency transmissions and receiving circuit, central controller and memory, electric power management circuit, voice channel circuit, subscriber identification module, the LCD display circuit, it is characterized in that above-mentioned radio frequency reception and radiating circuit are connected with central controller, central controller connects voice channel circuit, user identification module circuit and LCD display circuit, audio signal interface, serial communication interface, keystroke interface, the LCD display interface, User Recognition interface and power circuit interface are formed the module user interface, are connected with external circuits by board to board connector.
2. according to the described cellular phone module of claim 1, it is characterized in that described central controller adopts the MSM6000 chip.
3. according to the described cellular phone module of claim 1, it is characterized in that described memory adopts the integrated circuit of FLASH+PSRAM structure.
4. according to the described cellular phone module of claim 1, it is characterized in that described power circuit comprises charge management circuit.
5. according to any described cellular phone module of claim 1 to 4, it is characterized in that described module is installed on the pcb board pcb board outer cover radome.
6. a telephone set comprises keyboard, LCD demonstration, external power supply, UIM card, microphone and receiver, it is characterized in that also comprising above-mentioned cellular phone module.
7. according to the described telephone set of claim 6, it is characterized in that the central controller of described cellular phone module adopts the MSM6000 chip.
8. according to the described telephone set of claim 6, it is characterized in that the integrated circuit of the memory employing FLASH+PSRAM structure in the described cellular phone module.
9. according to the described telephone set of claim 6, it is characterized in that the power circuit in the described cellular phone module comprises charge management circuit.
10. according to any described telephone set of claim 6 to 9, it is characterized in that described cellular phone module is installed on the pcb board pcb board outer cover radome.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320121189 CN2672982Y (en) | 2003-12-06 | 2003-12-06 | Radio fixed telephone module and telephone set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320121189 CN2672982Y (en) | 2003-12-06 | 2003-12-06 | Radio fixed telephone module and telephone set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2672982Y true CN2672982Y (en) | 2005-01-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320121189 Expired - Fee Related CN2672982Y (en) | 2003-12-06 | 2003-12-06 | Radio fixed telephone module and telephone set |
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| Country | Link |
|---|---|
| CN (1) | CN2672982Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100486266C (en) * | 2003-12-06 | 2009-05-06 | 海信集团有限公司 | Wireless fixed telephone module |
| CN103434901A (en) * | 2013-08-27 | 2013-12-11 | 广东奥美格传导科技股份有限公司 | Novel anti-interference type lift car top control cabinet |
-
2003
- 2003-12-06 CN CN 200320121189 patent/CN2672982Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100486266C (en) * | 2003-12-06 | 2009-05-06 | 海信集团有限公司 | Wireless fixed telephone module |
| CN103434901A (en) * | 2013-08-27 | 2013-12-11 | 广东奥美格传导科技股份有限公司 | Novel anti-interference type lift car top control cabinet |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |