CN1352826A - System and method for selectively controlling amplifier performance - Google Patents
System and method for selectively controlling amplifier performance Download PDFInfo
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- CN1352826A CN1352826A CN00807791A CN00807791A CN1352826A CN 1352826 A CN1352826 A CN 1352826A CN 00807791 A CN00807791 A CN 00807791A CN 00807791 A CN00807791 A CN 00807791A CN 1352826 A CN1352826 A CN 1352826A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
- H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
- H03F1/0261—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers with control of the polarisation voltage or current, e.g. gliding Class A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
- H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
- H03F1/0211—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers with control of the supply voltage or current
- H03F1/0216—Continuous control
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F3/24—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B2001/0408—Circuits with power amplifiers
- H04B2001/045—Circuits with power amplifiers with means for improving efficiency
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- Power Engineering (AREA)
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- Circuits Of Receivers In General (AREA)
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Abstract
A system for extending the battery life of a wireless phone has four circuits. A first circuit (20) provides a control signal (40) indicative of a mode of the wireless phone. A second circuit (20), which may be the same as the first circuit, provides a transmit signal (Tx). A third circuit (32) receives a biasing signal (42) and amplifies the transmit signal in preparation for transmission. A fourth circuit (12) selectively alters the power dissipated by the third circuit by selectively changing the biasing signal in response to the control signal.
Description
Background of invention
I. invention field
The present invention relates to amplifier.Specifically, the present invention relates to the performance by control power amplifiers improvement in performance radio telephone and relevant cellular communication system selectively and prolong the system and method in the life-span of radio telephone battery.
II. description of Related Art
The characteristics of cellular telecommunication system are a plurality of mobile transceivers, such as mobile phone (being also referred to as radio telephone, travelling carriage, or cell phone), with one or more base station communications.
Radio telephone comprises the transceiver with the part of sending and receiving unit.In the receiving unit of typical transceiver, analog radio frequency (RF) signal partly is down-converted to intermediate frequency (IF) through the antenna reception and by RF.Signal processing circuit is finished noise filtering and is controlled the amplitude of (AGC) circuit adjustment signal through the simulation automatic gain.Afterwards, the IF part drops to base band to signal mixing, and analog signal is transformed into digital signal.Digital signal is input to baseband processor again, signal is further handled, with output voice or data.
Similarly, sending part divides the input of the reception numeral that baseband processor is come and this input is transformed to analog signal.To this signal filtering, upconvert to intermediate frequency then through the IF level.Regulate the gain of this transmission signal, the IF signal is upconverted to hyperfrequency, for wireless transmission is got ready.
Radio telephone through the base station and/or mobile switching centre at transferring voice or data-signal between other radio telephones or between landline phone.Public switch telephone network (PSTN) is communicated by letter with base station or mobile switching centre, promotes the signal Route Selection between landline phone and wireless network.1 zone can be managed in big base station, and this zone is divided into several sub-districts, and each grid and a BTS under CROS environment (BTS) link.Perhaps, single base station can be managed the specific cell related with given geographic area.
Communication link between base station or BTS and travelling carriage (forward direction or reverse link) is a fading channel, is a kind of channel of fierce degradation.This species impoverishment comes from many influences, comprises the structure of multipath fading, process atmosphere and top and the serious decay that the next multipath reception to sending signal reflex of object causes, this species impoverishment also is derived from the interference that other user produces in this communication system.Other influence that causes fading channel to produce has the kinetic Doppler shift of receiver with respect to transmitter, and additive noise.
Ability particular importance in code division multiple access (CDMA) wireless communication system of effectively working in noise or fading environment are arranged, at cdma system, the common-channel interference that Lei Lai decline (Raleigh-faded) signal environment and other user come is common.Lei Lai decline is derived from because the Doppler frequency in the received signal that the motion of mobile radio station causes is offset.Produce cochannel and disturb when cdma communication system is kept a plurality of system user, each further user increases progressively cochannel and disturbs.Cochannel disturbs typically bigger than the interchannel noise such as other form of additional white Gauss noise (AWGN) etc.
In thunder Lay fading signal environment, the power level of the signal of communication of emission distributes with Lei Lai and fluctuates.This power fluctuation is typically in the scope of 10dB-50dB.The decline phase be mobile radio station (being cell phone) speed, distribute to the channel of mobile radio station and the function of whole signal environment.When the speed rising of mobile unit, the decline phase descends, and produces short burst error.When the speed decline of mobile unit, the decline phase rises, and produces long burst error.
The signal that sends voice signal for example when radio telephone is during to the base station, the power of required transmission signal depends on the interference characteristic of channel, this usually becomes with the relative degree of closeness of radio telephone to relevant base station, and when near the base station, radio telephone requires lower-wattage and the efficient communication of relevant base station.
Radio telephone transmission signal power demand level becomes with the variation of noise and channel fading characteristic.Some radiotelephony is not considered the variation that power needs, but total power is broadcast continuously.This causes shorter battery life and may increase channel disturbance.
The many traditional power levels of radio telephone in order to consider to change have adopted automatic gain control circuit to regulate the gain that sends signal in the part.This phone can be transferred between height and low-power mode, depends on that phone sends the interference characteristic of channel between the degree of closeness of base station and/or base station and radio telephone relatively.When radio telephone during near the base station, this channel is introduced lower interference to sending signal, thereby power levels of transmitted signals can reduce, so that save electric power, extending battery life increases the wireless telephonic air time.
Regrettably, use traditional automatic gain control circuit deficiency separately so that the performance of phone and power consumption reach the best.Radio telephone comprises secondary power amplifier and filter, and their performance and power consumption become with temperature and signal operational environment.Existing systems is controlled the power consumption of these booster amplifiers and performance not yet in effectly and not yet in effect regulated variations in temperature and make the performance of phone and battery life reach the best.Radio telephone often comprises power amplifier, and its effective performance is for extending battery life and relevant air time particular importance.
Therefore, need a kind of efficient system and method to make wireless telephonic performance reach life-span and air time best and the prolongation telephone cells in the art.Also need a kind of effective system to be used to control the power consumption of radio telephone intermediate power amplifier of the reason of explanation variations in temperature.
Summary of the invention
The system of prolongation radio telephone battery life of the present invention satisfies these needs in this area.In the embodiment of explanation, system of the present invention is applicable to the transceiver of code division multiple access (CDMA), and the 1st circuit that provides control signal to show the radio telephone mode is provided in this system.The 2nd circuit provides the transmission signal.The 3rd circuit amplifies this transmission signal, for transmission is got ready.The 3rd circuit needs offset signal.The 4th circuit responsive control signal changes offset signal selectively and changes the power consumption of the 3rd circuit selectively.
In a particular embodiment, the 4th circuit comprises the circuit of system's ideal operation pattern of determining that control signal is indicated.The 4th circuit is called the usefulness circuit, also comprises the circuit of regulating offset signal according to the ideal operation pattern of system.Bleeder circuit in the usefulness circuit has a node, between the 1st impedance circuit and the 2nd impedance circuit.The 1st impedance circuit comprises according to the ideal operation pattern and changes the switch that the impedance of the 1st impedance circuit is used.The 1st impedance circuit comprises 1st resistance in parallel with the 2nd resistance.Switch is a transistor, is used for according to the ideal operation pattern the 1st resistance or the 2nd resistance and voltage divider isolation.
Provide the 1st circuit of control signal to comprise digit chip or telephone modem.The digit chip executive software detects the operational environment of radio telephone and place system and to respond, to establish control signal.Receiver provides information for software, helps to determine mode of operation.According to information indication, this pattern is respectively high-power mode or the low-power mode with clearing signal (clear signal) environmental correclation of electrical noise signal environment or electricity.
The 2nd circuit has transmit path, comprises the digit chip that links to each other with automatic gain control circuit, and automatic gain control circuit links to each other with the intermediate-frequency circuit that is connected the radio frequency mixting circuit, and this mixting circuit connects filter segment, and filter segment output sends signal.
The independent usefulness circuit of the present invention helps novel designs of the present invention.The usefulness circuit is according to wireless telephonic power mode, signal operational environment and/or temperature, controls power consumption, gain and/or the performance of the temperature of the 3rd circuit that relevant rate of doing work amplifier uses selectively.As a result, strengthened comprehensive control, thereby improved the life-span and the air time of telephone cells the 3rd circuit performance, and the performance of having improved relevant variations in temperature.
The accompanying drawing summary
Fig. 1 is the schematic diagram with radio telephone transceiver of the usefulness circuit that constitutes according to the present invention.
Fig. 2 is the more detailed schematic diagram of usefulness circuit among Fig. 1.
Fig. 3 is the optional embodiment of usefulness circuit among Fig. 2.
Invention is described
Though present invention is described in conjunction with illustrative application-specific embodiment here, should see that the present invention is not limited to this.The personnel that have common sense in this area and the explanation provide here is provided can here disclose in the additional fields that scope and the present invention have great practicality and modify, use and other embodiment.
Fig. 1 is the schematic diagram with radio telephone transceiver 10 of the usefulness circuit 12 that constitutes according to the present invention.For the sake of clarity, omitted some CONSTRUCTED SPECIFICATION among Fig. 1, such as loud speaker, microphone, vocoder, clock circuit, reference oscillator and transceiver 10 in other circuit.According to explanation of the present invention, those skilled in the art can know that these adjunct circuits are arranged on and implement them where and how.
Transceiver 10 is embodied as wireless code division multiple address (CDMA) phone, comprises battery 14, power is provided for transceiver 10.Transceiver 10 comprises sendaisle 16 and receive path 18.Sendaisle 16 comprises digital control chip 20 from left to right, and automatic gain control (AGC) circuit 22, intermediate frequency (IF) be to the frequency mixer 24 of radio frequency (RF), driver 28, power amplifier (PA) 32, isolator 33, duplexer 34 and antenna 36.Receive path 18 also comprises antenna 36, duplexer 34, and digital control chip 20 also comprises the receiving unit 38 that is connected 20 of duplexer 34 and digital control chips.
Battery 14 is connected to digital control chip 20, AGC22, frequency mixer 24, receiving unit 38, driver 28, power amplifier 32 and usefulness circuit 12.The output of usefulness circuit 12 is connected to the biasing input of power amplifier 32.
In the work, duplexer 34 is shared antenna resource between sending function of carrying out by sendaisle 16 and receive path 18 respectively and receiving function.Isolator 33 is kept apart power amplifier 32 and antenna 36 and duplexer 34, prevents that power reflection from turning back to power amplifier 32 from antenna 36.
The signal that antenna 36 receives is sent to receiving unit 38 through duplexer 34.Receiving unit 38 comprises filter and signal mixing and lower frequency changer circuit (not shown), and this frequency changer circuit is that the baseband processor (not shown) of received signal in being included in digital control chip 20 handled and got ready.Those skilled in the art can be easy to design and implement receiving unit 38 to be fit to the needs of given application.Antenna 36, duplexer 34, receiving unit 38 and digital control chip 20 constitute the receiving unit of radio telephone transceiver 10.
Digital control chip 20 comprises the digital signal processor that is called baseband processor (not shown), other treatment circuit of mobile station modems and operating software and control radio telephone 10 work usefulness.Digital control chip 20 comprises the analog signal that receive path is come and is transformed into the analog digital converter (ADC) (not shown) that digital signal is used, and also comprising the digital signal conversion that baseband processor is come, to become analog signal be the digital to analog converter (DAC) (not shown) that sends the usefulness of getting ready through sendaisle 16.
The simulation of digital control chip 20 sends signal and is input to AGC22, and as hereinafter discussing fully, the gain that sends signal is here regulated according to the power mode of the transceiver of determining through software or hardware in the digital control chip 20 10.Send signal and be transformed into simulation UHF signal through upconverter 24 again, be synchronized to suitable UHF frequency through oscillator (not shown) as frequency mixer.This up-conversion signal is through the 1st filter 26, driver 28 and 30 filtering of the 2nd filter and demarcation, and filtering noise also is ready for sending signal and is used for sending.Filtered transmission signal is amplified by power amplifier 32, the gain of amplifier 32 and power consumption are subjected to the control of usefulness circuit 12, and the control signal that 12 responses of usefulness circuit receive from digital control chip 20 changes to the offset signal 42 of power amplifier 32 selectively.Usefulness circuit 12 also response temperature variation changes offset signal 42 selectively, and making the performance of amplifier 32 is stable with respect to temperature.Usefulness circuit 12 is-30 ℃ of performances to 110 ℃ of scope stabilizing amplifiers 32.
Digital control chip 20 comprises baseband processor (not shown), carries out traditional software or hardware algorithm, measured signal amplitude or intensity, and this is responded, the received signal intensity indication (RSSI) of received signal is provided.Digital control chip 20 response rssi measurements provide control signal 40 to usefulness circuit 12.If RSSI is than predetermined threshold height, then digital control chip 20 sends control signal 40 and provides the gain-adjusted parameter to agc circuit 22 to usefulness circuit 12, thereby transceiver 10 is arranged on low-power mode.Equally, if RSSI is low, then digital control chip 20 is arranged on high-power mode with transceiver.Under low-power mode, descend through the signal power that sendaisle 16 sends from digital control chip 20, constitute good quality channel according to high rssi measurement.Equally, under high-power mode, transceiver 10 extracts more power from battery 14 and is sent.Predetermined threshold is a kind of with the regulation of using, and those skilled in the art can easily regulate it, to satisfy the needs of given application.
Usefulness circuit 12 control offset signals 42 are with the gain and the synthesized output signal power of resonance-amplifier 32.In current specific embodiment, when control signal 40 was in low-voltage state, the amplitude of offset signal 42 increased, thereby increased the gain and the power consumption of amplifier 32.Equally, when control signal 40 was in high-voltage state, the amplitude of offset signal 42 reduced.
When power amplifier 32 was heterogenous dual-pole junction transistor (HBT) amplifier, offset signal 42 was current signals.When power amplifier was GaAs field effect transistor (FET) amplifier (GaAsFET), offset signal 42 was voltage signals.
Fig. 2 is the more detailed schematic diagram of usefulness circuit 12 among Fig. 1.Battery 14 provides the cell voltage (Vcc) of variation to adjuster 43 among Fig. 1, and adjuster 43 is regulated this and changed voltage vcc, and approximate constant voltage (Vreg) is provided on the node 13 that connects the 1st resistance R 1 the 1st end and the 2nd resistance R 2 the 1st end.The negative input end of the 2nd end concatenation operation amplifier 50 of the 1st resistance R 1 and the source electrode of P-channel metal-oxide-semiconductor field-effect transistor (MOSFET) 52.The output of the grid concatenation operation amplifier 50 of P channel mosfet 52.The drain electrode of P channel mosfet 52 connects power amplifier 32 and provides offset signal Iref42 to the offset side of power amplifier 32.In this specific embodiment, power amplifier 32 constitutes the HBT amplifier.
Pnp BJT 54 is as switch, and responsive control signal (Vcontrol) adds to the low-voltage state of base stage of pnp BJT 54 selectively with the 2nd end ground connection of the 4th resistance R 4 through resistance R 3.Transistor 54 can substitute with the switch of another type and not depart from the scope of the present invention.
The work of usefulness circuit 12 is such, when control signal Vcontrol 40 is in low-voltage state (for example 0 volt), and the function of the fixed voltage Vreg that reference signal Iref provides for adjuster among Fig. 1 43, as described in following equation:
Wherein, R4//R5 is computing in parallel, is defined as following equation:
Selection to resistance R 1, R2, R4 and R5 value belongs to concrete application, can is easy to regulate by those skilled in the art, to satisfy the needs of given application.In the present embodiment, R1=27.0 Ω, R2=392.0 Ω, R3=10.0K Ω, R4=36.0K Ω and R5=18.0K Ω, and Vreg=3.0V.
The voltage of battery 14 outputs in the Vcc presentation graphs 1, it can change at the whole charge cycle of battery 14, and Vreg represents the constant DC reference voltage of voltage regulator 43 outputs.
When control signal Vcontrol 40 was in high-voltage state (for example 5 volts), reference signal Iref was the function of fixed voltage Vreg, as described in following equation:
R5＞R4//R5, thereby cut off the effect of R4 through pnp BJT 54, control signal 40 descends bias current Iref.
When control signal 40 was in high-voltage state, control signal 40 was kept apart R4 and usefulness circuit 12 selectively.Lack the effect of R4, make the voltage (V+) of positive input terminal of operational amplifier 50 and the voltage (V-) of negative input end increase.The voltage of this increase has reduced by the 1st resistance R 1 (according to Ohm's law) thereby by the source electrode of P channel mosfet 52 and the electric current that drains and flow.Electric current I ref reduces as a result.Known in the art, for operational amplifier, V+=V-and I+=I-=0.
The 4th resistance R 4 and the 5th resistance R 5 constitute the 1st impedance circuit 57, connect the 2nd impedance circuit 59 at node 15.The 2nd impedance circuit 59 comprises the 1st resistance R the 1, the 2nd resistance R 2 and node between the two 13.The resistance value of the 1st impedance circuit 57 changes selectively by transistor 54 and control signal 40.When transistor 54 conductings, the resistance value of impedance circuit 57 is by equation (2) approximate calculation.When transistor 54 ended, the 4th resistance R 4 was isolated, and the resistance value of the 1st impedance circuit 57 or resistance value equal the resistance value of the 5th resistance R 5.By controlling the resistance value of the 1st impedance circuit 57 selectively through control signal 40 and transistor 54, may command offset signal 42 promptly passes to the electric current I ref of power amplifier 32.
The resistance value of P channel mosfet 52 becomes with temperature, and helping stable finally extremely is the performance of the amplifier 32 in the operational environment of feature with temperature.P channel mosfet 52 can replace and do not depart from the scope of the present invention with the transistor of another type or variable resistor.
Make pnp BJT 54 conductings and end the low and high-voltage state that requires control signal 40 respectively, the low and high-voltage state of control signal 40 depends on transistorized parameter, and those skilled in the art can select to satisfy the needs of given application it.
The transceiver of conventional wireless phone does not have usefulness circuit 12, can not respond the variation of transceiver power mode or variations in temperature and the performance of control power amplifiers 32 accurately.Do not have usefulness circuit 12, the performance of power amplifier 32 can become with temperature, make transceiver 10 in hot-cool environment or the performance in electrical noise or clear signal environment obviously descend, cause super power consumption and/or undesirable transceiver performance.
Those skilled in the art should be appreciated that usefulness circuit 12 or expand to and regulate plural transceiver power mode and do not depart from the scope of the present invention.
Fig. 3 is the conversion example 60 of usefulness circuit 12 among Fig. 1.The voltage vcc of battery 14 is added to voltage inverter 64 among Fig. 1, the 1st offset side of operational amplifier 50 and the output of accurate benchmark voltage generator 66.The 2nd offset side of the output concatenation operation amplifier 50 of inverter 64.The output of accurate pedestal generator 66 connects the 1st end of the 6th resistance R 6 and the 1st end of the 7th resistance R 7, and accurate reference voltage V ref is provided.
The 2nd end of the 6th resistance R 6 connects switch 68, and switch 68 can be made of the n channel fet.The 2nd end of the 6th resistance R 6 connects the 1st end (for example being connected to the drain electrode of n channel fet) of switch 68.Control signal 40 is added to the control end (for example grid of n channel fet) of switch 68, selectively the 2nd end of the 6th resistance R 6 is connected to node 69 to respond this control signal 40.The negative input end of node 69 concatenation operation amplifiers 50, the 1st end of the 2nd end of the 7th resistance R 7 and the 8th resistance R 8.Node 69 also connects the 2nd end (for example, the source electrode of n channel fet (S)) of switch 68.The offset side of the output of the 2nd end concatenation operation amplifier 50 of the 8th resistance R 8 and metal-semiconductor field effect transistor (MESFET) amplifier 32 ', in this specific embodiment, amplifier 32 ' is a GaAs FET amplifier.The positive input terminal ground connection of operational amplifier 50.
Precise voltage Vref is a constant voltage, and the value of this voltage is relevant with concrete application, can equal or be not equal to constant voltage Vreg among Fig. 2 that voltage regulator 43 is exported among Fig. 2.Vref and Vreg are the DC reference voltage predetermined values of high stability high precision.Those skilled in the art can determine at an easy rate that suitable Vref or Vreg value are to satisfy the requirement of given application.Accurate pedestal generator 66 can be made of according to voltage regulator, voltage Calibration Circuit or other similar circuit skilled person in this area.
In the work, the voltage vcc that battery 14 provides among Fig. 1 is added to the 1st offset side and the inverter 64 of operational amplifier 50.Inverter 64 is anti-phase with voltage+Vcc, negative cell voltage-Vcc is added to the 2nd offset side of operational amplifier 50.
Reference voltage V ref is the dc voltage predetermined value of high stability high precision.This scheduled voltage is relevant with concrete application, can be determined to satisfy the needs of given application at an easy rate by those skilled in the art.
Respond the high-voltage state or the low-voltage state that are added to the control end of switch 68 by control signal 40 respectively, switch on or off the effect of 6 pairs of usefulness circuit 60 of the 6th resistance R.Switch 68 can use the transistor such as FET to constitute.
When control signal 40 is high-voltage state, offset signal, the voltage (Vgg) that promptly is added to GaAs FET amplifier 32 ' is the function of accurate reference voltage V ref, as described in following equation:
Wherein, computing in parallel is as described above.In the present embodiment, R8=16.2 Ω, R6=340.0K Ω, R7=13.3K Ω, Vcc=4.1V is to 3.2V.
When control signal 40 was low-voltage state, switch 68 ended, and the 6th resistance R 6 is isolated.This make bias voltage Vgg calibration (establish R7＞R6//R7), as described in following equation:
The 6th resistance R 6 and the 2nd resistance R 7 are parts of the 1st impedance circuit 57 '.On behalf of the 2nd impedance circuit 59 ', 59 ', the 8th resistance R 8 connect the 1st impedance circuit 57 ' at node 69.The 1st impedance circuit 57 ' changes its resistance value selectively by switch 68 and control signal 40.When switch 68 was connected, the resistance value of the 1st impedance circuit 57 ' was approximately R6//R7.When switch 68 disconnected, the 6th resistance R 6 was isolated, and the resistance value of the 1st impedance circuit 57 ' equals the resistance value of the 7th resistance R 7.Control the impedance of the 2nd impedance circuit 59 ' selectively by control signal 40 and switch 68, thereby control the offset signal Vgg that is added to power amplifier 32 '.
Here the invention has been described with reference to the specific embodiment of application-specific.But those skilled in the art can make additional modifications, application and other embodiment within the scope of the present invention according to the announcement here.
Therefore, the applicant is contained any and whole application, modification and embodiment in the scope of the invention with appended claims.
Claims (29)
1. a system that prolongs battery life in the radio telephone is characterized in that, comprises:
The device of the control signal that shows described radio telephone mode of operation is provided;
The device that sends signal is provided;
Amplify described transmission signal for sending the device of getting ready, this amplifying device requires offset signal; With
Thereby respond described control signal and change the device that described offset signal changes described amplifying device power consumption selectively selectively.
2. the system as claimed in claim 1 is characterized in that, wherein, described have the selection modifier to comprise the device of determining by the described wireless telephonic ideal operation pattern of described control signal indication.
3. system as claimed in claim 2 is characterized in that, wherein, described have select modifier to comprise to regulate the device of described offset signal according to described ideal operation pattern.
4. system as claimed in claim 3 is characterized in that, wherein, described adjusting device is included in the bleeder circuit that has node between the 1st impedance circuit and the 2nd impedance circuit.
5. system as claimed in claim 4 is characterized in that, wherein, described the 1st impedance circuit comprises the switch that changes the impedance of described the 1st impedance circuit according to described ideal operation pattern.
6. system as claimed in claim 5 is characterized in that, wherein, described the 1st impedance circuit comprises 1st resistance in parallel with the 2nd resistance.
7. system as claimed in claim 6 is characterized in that, wherein, described switch is the transistor of described the 1st resistance or described the 2nd resistance and described bleeder circuit being kept apart according to described ideal operation pattern.
8. the system as claimed in claim 1 is characterized in that, wherein, the described device of control signal that provides comprises digit chip.
9. system as claimed in claim 8 is characterized in that, wherein, described digit chip comprises response described wireless telephonic operational environment is detected to set up the software of described control signal.
10. system as claimed in claim 9 is characterized in that, also comprises receiver, and described receiver provides information to help to set described pattern to described software.
11. system as claimed in claim 10 is characterized in that, wherein, described pattern is being respectively and electrical noise signal environment or relevant high-power mode or the low-power mode of former generating signal environment of indicating of information as described.
12. system as claimed in claim 8, it is characterized in that, wherein, the described device that sends signal that provides comprises the digit chip that links to each other with automatic gain control circuit, described automatic gain control circuit connects the mixting circuit of if-to-rf, described mixting circuit connects filter segment, and described transmission signal is represented in the output of described filter segment.
13. a system that prolongs battery life in the radio telephone is characterized in that, comprises:
The 1st control signal state that shows low-power mode and the device that shows the 2nd control signal state of high-power mode are provided;
The device that sends signal is provided;
Amplify described transmission signal for sending the device of getting ready by pre-determined factor; And
Responding described the 1st control signal reduces described gain coefficient and responds described low-power mode to increase described gain coefficient to change the device of described amplifying device power consumption selectively.
14. a system that improves efficiency power amplifier is characterized in that, comprises:
Determine the ideal operation pattern of described power amplifier and provide control signal to respond the 1st device of this pattern;
The 2nd device of offset signal is provided to described power amplifier; With
Respond the 3rd device that described control signal changes described offset signal selectively.
15. an effective transceiver is characterized in that, comprises:
Receiving the 1st signal and measuring the predetermined characteristic of this signal and respond this feature provides the 1st of control signal to install;
Responding described control signal installs the setting state of described transceiver selectively to the 2nd of predetermined transceiver state;
The 3rd device of the 2nd radiofrequency signal is provided;
Amplify the 4th device of described the 2nd radiofrequency signal with gain coefficient/biasing;
Respond the 5th device that described predetermined transceiver pattern changes described gain coefficient/biasing selectively.
16. transceiver as claimed in claim 15 is characterized in that, wherein, described the 5th device also comprises the device by temperature-induced variations that limits described gain coefficient/biasing.
17. transceiver as claimed in claim 16 is characterized in that, wherein, the device of the variations in temperature of the described gain coefficient of described restriction/biasing comprises operational amplifier, and this operational amplifier has an output to connect transistorized base stage or grid.
18. transceiver as claimed in claim 17 is characterized in that, wherein, described transistor is a p NMOS N-channel MOS N field-effect transistor.
19. transceiver as claimed in claim 15 is characterized in that, wherein, described predetermined transceiver pattern is low-power mode or high-power mode.
20. transceiver as claimed in claim 15 is characterized in that, wherein, the predetermined characteristic of described the 1st signal is the amplitude of interference components in described the 1st signal.
21. transceiver as claimed in claim 15 is characterized in that, wherein, described the 4th device comprises power amplifier.
22. transceiver as claimed in claim 15 is characterized in that, wherein, described the 4th device comprises the heterojunction bipolar transistor amplifier.
23. transceiver as claimed in claim 15 is characterized in that, wherein, described the 4th device comprises the metal-semiconductor field effect transistor amplifier.
24. transceiver as claimed in claim 15 is characterized in that, wherein, described metal-semiconductor field effect transistor amplifier is the GaAs field-effect transistor, and described the 1st receiving system comprises receiver and digit chip.
25. transceiver as claimed in claim 24 is characterized in that, wherein, described digit chip executive software, this software are used to calculate the signal strength signal intensity of described the 1st signal and respond this signal strength signal intensity provides described control signal.
26. transceiver as claimed in claim 25 is characterized in that, wherein, described the 2nd device comprises the device that the response high signal intensity is set to described transceiver low-power mode.
27. transceiver as claimed in claim 26 is characterized in that, wherein, described the 2nd device comprises the device that the response low signal intensity is set to described transceiver high-power mode.
28. an effective transmitter is characterized in that, comprises:
The digit chip of intermediate-freuqncy signal and mode initialization signal is provided;
Described intermediate-freuqncy signal is amplified to predetermined level and amplification responded the automatic gain control circuit of amplified IF signal is provided;
Described amplified IF signal is transformed to the frequency-conversion circuit of radiofrequency signal;
Described radiofrequency signal is carried out filtering and filtering is responded the filter of filtered radiofrequency signal is provided;
Amplifying described radiofrequency signal performs and send to prepare and respond the power amplifier that this radiofrequency signal is amplified provides the radiofrequency signal after the amplification;
Respond described mode initialization signal and regulate the power control circuit of the power consumption of described power amplifier selectively; With
Send the antenna of the radiofrequency signal after the described amplification.
29. a method that prolongs battery life in the radio telephone is characterized in that, comprises the following step:
Generation shows the control signal of described the radio telephone mode;
The transmission signal is provided;
Amplify described transmission signal and get ready for sending, described amplifying device requires offset signal; With
Thereby responding described control signal changes described offset signal selectively and changes power consumption in the described amplification procedure selectively.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US29375199A | 1999-04-16 | 1999-04-16 | |
| US09/293,751 | 1999-04-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1352826A true CN1352826A (en) | 2002-06-05 |
Family
ID=23130424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00807791A Pending CN1352826A (en) | 1999-04-16 | 2000-04-13 | System and method for selectively controlling amplifier performance |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP1175732A1 (en) |
| JP (1) | JP2002542708A (en) |
| KR (1) | KR20020005686A (en) |
| CN (1) | CN1352826A (en) |
| AU (1) | AU4463200A (en) |
| CA (1) | CA2370209A1 (en) |
| WO (1) | WO2000064062A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10150476A1 (en) * | 2001-10-16 | 2003-04-17 | Thomson Brandt Gmbh | Reducing transmitter power losses when operating bi-directional communications system with wireless data signal transmission involves evaluating transmission, adapting supply energy |
| JP4146145B2 (en) * | 2002-03-19 | 2008-09-03 | 三星電子株式会社 | Software defined radio and software radio signal processing method |
| JP3942479B2 (en) * | 2002-04-26 | 2007-07-11 | 株式会社ルネサステクノロジ | High frequency power amplification module |
| KR100619899B1 (en) * | 2004-08-31 | 2006-09-12 | 엘지전자 주식회사 | A method and a apparatus of high speed power switching on power amplifier module for mobile phone |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2258370B (en) * | 1991-08-02 | 1995-09-06 | Technophone Ltd | Cellular telephone |
| US5590412A (en) * | 1993-11-19 | 1996-12-31 | Sanyo Electric Co., Ltd. | Communication apparatus using common amplifier for transmission and reception |
| SE514943C2 (en) * | 1994-01-12 | 2001-05-21 | Ericsson Ge Mobile Communicat | Conserving power in battery-powered transceiver |
| GB2286305B (en) * | 1994-01-29 | 1998-12-02 | Motorola Ltd | Power amplifier for radio transmitter and dual mode remote radio |
-
2000
- 2000-04-13 CN CN00807791A patent/CN1352826A/en active Pending
- 2000-04-13 CA CA002370209A patent/CA2370209A1/en not_active Abandoned
- 2000-04-13 WO PCT/US2000/010239 patent/WO2000064062A1/en not_active Application Discontinuation
- 2000-04-13 JP JP2000613085A patent/JP2002542708A/en active Pending
- 2000-04-13 AU AU44632/00A patent/AU4463200A/en not_active Abandoned
- 2000-04-13 EP EP00926034A patent/EP1175732A1/en not_active Withdrawn
- 2000-04-13 KR KR1020017013198A patent/KR20020005686A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| JP2002542708A (en) | 2002-12-10 |
| CA2370209A1 (en) | 2000-10-26 |
| EP1175732A1 (en) | 2002-01-30 |
| WO2000064062A1 (en) | 2000-10-26 |
| KR20020005686A (en) | 2002-01-17 |
| AU4463200A (en) | 2000-11-02 |
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