WO2004079899A1 - 通信端末装置及び増幅回路 - Google Patents
通信端末装置及び増幅回路 Download PDFInfo
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- WO2004079899A1 WO2004079899A1 PCT/JP2004/002652 JP2004002652W WO2004079899A1 WO 2004079899 A1 WO2004079899 A1 WO 2004079899A1 JP 2004002652 W JP2004002652 W JP 2004002652W WO 2004079899 A1 WO2004079899 A1 WO 2004079899A1
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- power
- gain
- power supply
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- variable
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- 230000003321 amplification Effects 0.000 title claims abstract description 40
- 238000003199 nucleic acid amplification method Methods 0.000 title claims abstract description 40
- 238000004891 communication Methods 0.000 title claims description 24
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- 238000000034 method Methods 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 10
- 230000004044 response Effects 0.000 claims description 3
- 238000010295 mobile communication Methods 0.000 description 23
- 238000010586 diagram Methods 0.000 description 16
- 230000007480 spreading Effects 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 8
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/02—Manually-operated control
- H03G3/04—Manually-operated control in untuned amplifiers
- H03G3/10—Manually-operated control in untuned amplifiers having semiconductor devices
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/3036—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers
- H03G3/3042—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers in modulators, frequency-changers, transmitters or power amplifiers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/004—Control by varying the supply voltage
-
- 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
Definitions
- the present invention relates to, for example, a W-CDMA or IS-95 compliant CDMA mobile phone, a PHS phone (Personal Handyphone System), a PDA (Personal Digital (Data) Assistant) with a wireless communication function, or
- the present invention relates to a communication terminal device and an amplifier circuit which are preferably provided in a personal computer device or the like. Background art
- the base station supporting the W-CDMA system reduces the transmission level of each mobile communication terminal to the minimum necessary by adaptive transmission power control based on the SIR measurement value (signal power to interference power ratio). It communicates under control. Specifically, the base station despreads the signal received from each mobile communication terminal, performs RAKE combining, and measures the SIR measurement value. If the measured SIR value is larger than a predetermined value (target value), a control command for lowering the transmission level is transmitted to the mobile communication terminal device. If the measured SIR value is smaller than the target value, a control command to increase the transmission level is transmitted to the mobile communication terminal.
- target value a predetermined value
- the mobile communication terminal device adjusts the transmission level according to such a control command, and transmits a signal to the base station at the adjusted transmission level.
- FIG. 7 shows a circuit diagram of a variable power amplifying unit provided in a mobile communication terminal apparatus that performs such adaptive transmission power control.
- variable power amplifier a variable gain amplifier 101 with variable gain, a driver amplifier 102 with fixed gain, and a power amplifier 103 with fixed gain are connected in order. It is a three-stage amplifier.
- Each of the amplifiers 101 to 103 is supplied with a bias voltage (power supply voltage) from a power supply control unit, and drives a transmission system (active) from the control unit (CPU) of the mobile communication terminal device. ) Is in the driving state while the signal is high.
- variable gain amplifier 101 is variably controlled by a control voltage supplied from the CPU in response to a control command from the base station.
- the base station When a transmission signal subjected to spread modulation processing is supplied from the spread modulation processing unit via the input terminal 100 to such a variable power amplification unit, first, the base station transmits the variable gain amplifier 101 from the base station. This transmission signal is amplified by the gain corresponding to the control command of the first step, and then the transmission signal from the variable gain amplifier 101 is changed by the driver amplifier 102 and the power amplifier 103 having the fixed gain. Each width. Then, the transmission signal is transmitted from the output terminal 104 to the base station via the antenna. Thereby, the above-mentioned perspective problem can be solved.
- FIG. 8A shows the relationship between the control voltage and the gain of the variable gain amplifier 101 described above.
- FIG. 8B is a characteristic diagram showing the relationship between the current value supplied to the driver amplifier 102 and the control voltage of the variable gain amplifier 101.
- the horizontal axis represents the control voltage (V) supplied from the CPU to the variable gain amplifier 101
- the vertical axis represents the gain of the variable gain amplifier 101 that can be varied by this control voltage. (Db).
- the gain of the variable gain amplifier 101 gradually increases as the control voltage applied to the variable gain amplifier 101 increases.
- the horizontal axis represents the control voltage (V) supplied from the CPU to the variable gain amplifier 1 1
- the vertical axis represents the current supplied to the driver amplifier 102. Indicates the value (I).
- the driver amplifier 102 is designed such that the characteristic of the variable power amplifier at the maximum output of the variable power amplifier satisfies the SIR (signal power to interference power ratio) and the adjacent channel power leakage ratio. However, as shown in Fig. 8B, the low current output consumes the same amount of current as the maximum output. This means that the driver amplifier 102 has an extra linear characteristic when the output is low.
- the driver amplifier 102 consumes the same amount of current as the maximum output despite the low output. This was a factor that hindered prolonging the usable time of the communication terminal device.
- the present invention has been made in view of the above-described problems, and aims to reduce power consumption and provide a communication system that can extend the usable time of a mobile communication terminal device to which the present invention is applied.
- the purpose is to provide terminal equipment and amplifier circuits. Disclosure of the invention
- a communication terminal apparatus comprising: a receiving unit configured to receive transmission power control information for controlling transmission power of transmission information; At least a variable gain amplifying means for amplifying and outputting the transmission information according to the power control information, and a fixed gain / width means for amplifying and outputting the transmission information from the variable gain amplifying means with a fixed gain.
- the variable gain amplifying means has a large gain when the transmission power control information indicates a large transmission power, and has a small gain when the transmission power control information indicates a small transmission power. Amplifying and outputting the transmission information; and the power control means, when the transmission power control information indicates a large transmission power, from the power supply means to the fixed gain amplification means of the amplification means. Large amount of power supplied to The current amount is controlled so that the transmission power control information indicates a small transmission power.
- the power of the power supplied from the power supply means to the above-mentioned fixed gain / width means is amplifying means. The current flow is controlled so as to reduce the amount.
- the power control means performs a bypass process on the power supplied from the power supply means to the fixed gain amplifying means in accordance with the transmission power control information, so that the fixed gain amplifying means Control the amount of power supplied to reduce power consumption.
- variable width circuit includes: a variable gain amplifying means for amplifying and outputting the information with a gain corresponding to gain control information for controlling a gain for amplifying the information; And a fixed gain amplifying means for amplifying and outputting the fixed gain with a fixed gain.
- a power supply means for supplying power to the variable gain amplifying means and the fixed gain amplifying means of the amplifying means, and the power supply means and the amplifying means based on the gain control information.
- power control means for controlling the power of the power supplied to the fixed gain amplifying means.
- the power amount control means increases the amount of power supplied from the power supply means to the fixed gain amplification means of the amplification means when the gain control information indicates a large gain.
- the gain control information indicates a small gain
- the amount of power supplied from the power supply means to the fixed gain amplifying means of the amplifying means is controlled as follows. The current amount is controlled so as to decrease.
- Such an amplifier circuit is supplied to the fixed gain amplifying unit by bypassing the power supplied from the power supply unit to the fixed gain width unit according to the gain control information by the power amount control unit. Control the amount of power to reduce power consumption.
- the present invention uses the gain control information of the variable gain amplifying means to control the amount of power supplied from the power supply means to the fixed gain amplifying means located downstream of the variable gain amplifying means. I do.
- FIG. 1 is a block diagram of a main part of a mobile communication system to which the mobile phone according to the first to third embodiments to which the present invention is applied.
- FIG. 2 is a block diagram of a power variable amplifying unit provided in the mobile phone according to the first embodiment.
- FIG. 3 is a circuit diagram of a driver amplifier provided in the power variable amplifying unit of the mobile phone according to the first embodiment.
- FIGS. 4A and 4B are diagrams showing how power consumption can be reduced by controlling the amount of current in the driver amplifier.
- FIG. 5 is a circuit diagram of a driver amplifier provided in the mobile phone according to the second embodiment of the present invention.
- FIG. 6 is a circuit diagram of a driver amplifier provided in the mobile phone according to the third embodiment of the present invention.
- FIG. 7 is a circuit diagram of a power variable amplifying unit provided in a conventional mobile communication terminal device that performs adaptive transmission power control.
- FIGS. 8A and 8B are diagrams for explaining power consumption of a power variable amplifying unit provided in a conventional mobile communication terminal device.
- the present invention can be applied to a mobile phone compatible with a W_CDMA mobile communication system.
- FIG. 1 shows a schematic configuration of a mobile communication system to which a mobile phone according to a first embodiment of the present invention is applied.
- the entire mobile communication system is composed of a mobile phone, a radio base station (BTS), a radio system controller (RNC), a multimedia signal processor (MPE), etc. Shows only the configuration of the mobile phone and the wireless base station.
- BTS radio base station
- RNC radio system controller
- MPE multimedia signal processor
- the mobile phone performs predetermined modulation processing such as BPSK (BPSICBinary Phase Shift Keying) and HPSK (HPSK: Hybrid Phase Shift Keying) on transmission data.
- predetermined modulation processing such as BPSK (BPSICBinary Phase Shift Keying) and HPSK (HPSK: Hybrid Phase Shift Keying)
- a spreading processing unit 1 for performing spreading processing using a predetermined spreading code; and a despreading processing for received data from the radio base station using a spreading code synchronized with the spreading code of the received data.
- a despreading processor 2 a despreading processor 2.
- This mobile phone also performs rake demodulation processing on the received data from despreading processing section 2 to output the received data, and also sets a transmission power control bit (TPC bit) added to the received data.
- TPC Transmission Power Control
- It has a RAKE demodulation unit 3 that extracts and outputs a control voltage corresponding to this TPC bit.
- the mobile phone changes the gain based on the control voltage of the TPC bit, and uses the changed gain to transmit data from the spreading processor 1.
- a variable power amplifying unit 4 for amplifying and outputting data, transmitting transmission data from the variable power amplifying unit 4 to a radio base station, receiving data from the radio base station, and performing the despreading process. And an antenna 5 to be supplied to the unit 2.
- the radio base station includes an antenna 10 for transmitting and receiving data to and from the mobile phone, and a despreading processing unit 1 for performing despreading processing on received data received from the mobile phone via the antenna 10. 1, a RAKE demodulation unit 12 for performing a RAKE demodulation process on the despread received data, and measuring an SIR value (SIR: Signal to Interference rat io) based on the RAKE demodulated received data. And an SIR measurement unit 13.
- a comparison unit 1 that forms the TPC bit for controlling the transmission power of the transmission data transmitted from the mobile phone based on the difference between the target SIR value from the target SIR value output unit 14 and the target SIR value.
- the TPC bit and the transmission data are spread using a predetermined spreading code, and are subjected to predetermined modulation processing such as QPSK (QPSIC Quadrature Phase Shift Keying).
- a diffusion processing unit 16 for transmitting to the mobile phone.
- a wireless base station when a wireless base station receives transmission data from a mobile phone, the wireless base station despreads the received data in a despreading processor 11 and a RAKE demodulator 12. ⁇ Perform RAKE demodulation processing, and measure the SIR value of the received data in the SIR measurement unit 13. Then, the comparing section 15 compares the SIR value of the received data with the target SIR value, forms a TPC bit corresponding to the difference between the two, and forms the TPC bit. The packet is transmitted to the mobile phone via the spreading processor 16 and the antenna 10 together with the transmission data.
- the mobile phone Upon receiving the data from the radio base station, the mobile phone performs a despreading process on the received data in a despreading processing unit 2, and receives the despreaded processed data in a RAKE demodulation unit 3.
- the data is subjected to a RAKE demodulation process, and the above TPC,... Are extracted from the received data.
- the Rake demodulator 3 forms a control voltage corresponding to the TPC bit, and supplies the control voltage to the variable power amplifier 4.
- the power variable amplification unit 4 amplifies the transmission data spread by the spreading processing unit 1 with a variable gain based on the control voltage supplied from the RAKE demodulation unit 3, and amplifies the transmission data via the antenna 5 Send to the station.
- FIG. 2 shows a block diagram of the power variable amplifying unit 4 provided in the mobile phone to enable such adaptive transmission power control.
- the variable power amplifier 4 is a three-stage amplifier including a variable gain amplifier 21, a driver amplifier 22 and a power amplifier 23.
- Each of the amplifiers 21 to 23 is supplied with a bias voltage (power supply voltage) from a power supply control unit, and sets the transmission system to a drive state (active) from the control unit (CPU) of the mobile communication terminal device.
- the drive state is set to the drive state while the signal for this is at the high level.
- the driver amplifier 22 has the above-mentioned SIR (signal power versus (Interference power ratio) and adjacent channel power leakage ratio.
- the transmission data supplied from the spreading processing unit 1 via the input terminal 20 is changed in the variable gain amplifier 21 by a control voltage corresponding to the TPC bit. Increase in gain. Further, the transmission data amplified by the variable gain amplifier 21 is further amplified by the driver amplifier 22 and the power amplifier 23 having a fixed gain, and the transmission data is wirelessly transmitted from the output terminal 24 via the antenna 5. Transmit to base station.
- a bias voltage (power supply voltage) from the power supply control unit is constantly applied to each of the amplifiers 21 to 23, so that each of the amplifiers 21 to 23 is in a constantly driven state.
- a bias voltage power supply voltage
- the driver amplifier 22 of the variable power amplifier 4 is provided with a variable power supply circuit, and the variable power supply circuit reduces the amount of power supplied to the driver amplifier 22 by the variable power amplifier.
- the variable power supply circuit reduces the amount of power supplied to the driver amplifier 22 by the variable power amplifier.
- FIG. 2 shows an example of such a supply power variable circuit.
- the supply power variable circuit is configured by the variable resistor 25 that bypasses the current supplied to the transistor 26 of the driver amplifier 22.
- control voltage supplied to the variable gain amplifier 21 according to the TPC bit is also supplied to the variable resistor 25, and the resistance value of the variable resistor 25 is variably controlled by this control voltage. I do.
- the above driver amplifier By bypassing the variable amount of current corresponding to the resistance value among the currents supplied to the driver amplifier 22, the amount of current supplied to the driver amplifier 22 is changed by the power variable. Adjustment is made in accordance with the output level of the amplifier 4 to reduce unnecessary power consumption.
- a TPC bit instructing high-power transmission is transmitted from the wireless base station to the mobile phone.
- a higher control voltage corresponding to the TPC bit instructing the high-power transmission is applied from the RAKE demodulator 3 to the variable gain amplifier 21 and the variable resistor 25 of the driver amplifier 22. You. Then, the transmission data is amplified by the variable gain amplifier 21 having a large gain by the control voltage.
- the resistance value of the variable resistor 25 of the driver amplifier 22 is controlled to a large resistance value by the control voltage.
- the resistance value of the variable resistor 25 is controlled to a large resistance value, it becomes difficult for the current to flow through the variable resistor 25, and almost no current is limited to the transistor 26 of the driver amplifier 22. It will flow.
- the driver amplifier 22 amplifies and outputs the transmission data from the variable gain amplifier 21 with the gain fixedly set as the default.
- the TPC bit instructing low-power transmission is transmitted from the radio base station to the mobile phone.
- a lower control voltage corresponding to the TPC bit instructing the above low-output transmission is applied from the RAKE demodulator 3 to the variable gain amplifier 21 and the variable resistor 25 of the driver amplifier 22. Is performed.
- the transmission data is amplified by the variable gain amplifier 21 having a small gain by the control voltage.
- the resistance value of the variable resistor 25 of the driver amplifier 22 is controlled to a small resistance value by the control voltage.
- the driver amplifier 22 amplifies and outputs the transmission data from the variable gain amplifier 21 with a gain corresponding to the amount of current thus suppressed.
- FIG. 3 shows a circuit diagram of the driver amplifier 22.
- the driver amplifier 22 includes a transistor Tr 1 and a transistor Tr 2 to which the transmission data from the variable gain amplifier 21 is differentially input (P in, P in— X). It has a configured differential width circuit 30, a multiple power mirror circuit 31 composed of a transistor Tr 3, a transistor Tr 4 and a transistor Tr 5, and the variable resistor 25. I have.
- the bases of the transistors Tr 1 and Tr 2 that constitute the differential amplifier circuit 30 are connected to input terminals C 1 and C 2, respectively.
- the bases of the transistors T rl and Tr 2 are connected to the terminals P i ⁇ and P in— X, respectively. Connected to input terminal V bias.
- the collectors of the transistors Tr 1 and Tr 2 are connected to a constant voltage source VCC via collector resistances R c 1 and R c 2, respectively.
- the emitters of the transistors Tr 1 and Tr 2 are respectively connected to the collectors of the transistors Tr 3 and Tr 4 of the power rent mirror circuit 31. Further, the emitters of the transistors Trl and Tr2 are connected to one end and the other end of the emitter resistance Re1, respectively.
- Such a differential amplifier circuit 30 has a connection point between the collector of the transistor Tr1 and the collector resistance Rc1 and a connection point between the collector of the transistor Tr2 and the collector resistance Rc2.
- the differential output is taken out via the output coupling capacitors C 3 and C 4 respectively.
- This differential output is supplied to the power amplifier 23 via differential output terminals Pout and Pout-X.
- an AC load using an inductor or a capacitor may be used as the collector load of the transistors Tr 1 and Tr 2.
- a reactance component using an inductor or a capacitor may be used as an emitter resistance of the transistors Tr 1 and Tr 2.
- the collector of the transistor Tr5 is connected to the constant current source Iref connected to the constant voltage source VCC.
- the emitters of the transistors Tr3 to Tr5 are grounded, respectively, and the bases are commonly connected.
- a common connection point between the bases is connected to a connection point between the collector of the transistor Tr5 and the constant current source Iref.
- the ratio between the emitter size of the transistor Tr5 of the current mirror circuit 31 and the emitter sizes of the transistors Tr3 and Tr4 is set to “1: N”. Therefore, when the amplification factor of the transistor Tr5 is set to "1", the transistor Tr3 and the transistor The amplification rate of the star Tr 4 is an amplification rate “N times” the amplification rate of the transistor Tr 5.
- variable resistor 25 is provided in parallel with the transistor Tr 5 of the power rent mirror circuit 31, one end is grounded, and the other end is connected to the transistor Tr 5 and the constant current source I ref. Is connected to the connection point. Further, the variable resistor 25 is connected to the RAKE demodulation unit 3, and the resistance value is variably controlled according to the control voltage supplied from the RAKE demodulation unit 3 as described above.
- the current from the constant current source I ref flows through the transistor Tr 5 (I 1) and the variable resistor 25 (1 2) of the current mirror circuit 31, respectively.
- the value is controlled to a large resistance value, current hardly flows to the variable resistor 25 side, and most of the current from the constant current source I ref flows to the transistor Tr 5 side.
- the current I1 amplified by the transistor Tr5 is supplied to each base of the transistor Tr3 and the transistor Tr4 of the current mirror circuit 31, and the transistor Tr3 and the transistor Tr The current flowing to each collector of 4 will increase.
- the transmission data is differentially input to each base of the transistors Tr 1 and Tr 2 of the differential amplifier circuit 30 via the differential input terminals Pin and Pin-X. I have. For this reason, each of the transistors Tr 1 and Tr 2 performs a switching operation according to the differentially input transmission data.
- an AC differential input voltage is applied to the transistors Tr 1 and Tr 2 of the differential amplifier circuit 30, the above-mentioned constants are obtained by the transistors Tr 3 and Tr 4 of the power mirror circuit 31.
- the currents I c1 and I c2 obtained by amplifying the current I 1 from the current source I ref almost N times change according to the differential input voltage. Therefore, this current I c 1 is taken out from the connection point between the collector of the transistor Tr 1 of the differential amplifier circuit 30 and the collector resistance R c 1 via the output coupling capacitor C 3, and the current I c 2 is obtained.
- the driver amplifier 22 has approximately the maximum output width. Certain transmission data can be taken out through each differential output terminal P out, P out — X. This transmission data is supplied to the power amplifier 23.
- a low control voltage is applied from the RAKE demodulation unit 3 to the variable resistor 25, and the resistance value of the variable resistor 25 is small. It is variably controlled to a resistance value.
- the resistance value of the variable resistor 25 When the resistance value of the variable resistor 25 is controlled to a small resistance value, the current easily flows to the variable resistor 25 side, and most of the current from the constant current source I ref is changed to the variable resistor 2 as the current I 2.
- FIG. 4A is a characteristic diagram showing the relationship between the control voltage supplied to the variable resistor 25 and the gain of the variable gain amplifier 21 provided before the driver amplifier 22.
- FIG. FIG. 4 is a characteristic diagram showing a relationship between a control voltage supplied to the amplifier 21 and the variable resistor 25 (a control voltage for controlling the gain of the variable gain amplifier 21) and a bias current of the driver amplifier 22;
- the horizontal axis represents the control voltage (V) supplied from the RAKE demodulation unit 3 to the variable resistor 25, and the vertical axis represents the gain (V) of the variable gain amplifier 21 that can be varied by this control voltage.
- db the gain of the variable gain amplifier 21 gradually increases as the control voltage applied to the variable gain amplifier 21 increases.
- the horizontal axis represents the control voltage (V) supplied from the RAKE demodulation unit 3 to the variable resistor 25, and the vertical axis represents the bias current of the driver amplifier 22.
- the value (I) is shown.
- the dotted line shows the characteristics of a conventional driver amplifier configured to consume the same amount of current at low output as at maximum output
- the solid line shows the current according to the output level. This shows the characteristics of the driver amplifier 22 whose amount is controlled.
- the driver amplifier 22 variably controls the resistance value of the variable resistor 25 according to the control voltage, and the amount of bias current of the driver amplifier 22 is controlled. , The current consumption can be significantly reduced as shown by the shaded area in Fig. 4B.
- a variable resistor 25 is provided for the driver amplifier 22 and the resistance value of the variable resistor 25 is stored in the TPC bit.
- the amount of current supplied to the driver amplifier 22 at the time of low output can be significantly reduced, and the SIR (signal power to interference power ratio) and the adjacent channel leakage ratio are not adversely affected.
- the power consumption of the mobile phone can be greatly reduced.
- the usable time (continuous talk time, continuous standby time) of the mobile phone can be extended.
- variable resistor 25 is provided as a supply power variable circuit of the driver amplifier 22, and the resistance value of the variable resistor 25 is variably controlled to control the current flowing through the driver amplifier 22.
- a MOS transistor M0S: Metal Oxide Semiconductor
- MOS transistor is provided as a supply power variable circuit of the driver amplifier 22 and the MOS transistor is controlled. The control voltage is applied to the gate of the driver amplifier 22 to control the amount of current flowing through the driver amplifier 22.
- FIG. 5 shows a circuit diagram of driver amplifier 22 in the mobile phone according to the second embodiment. Note that, in FIG. 5, the same reference numerals are given to the portions exhibiting the same operation as the respective portions of the driver amplifier 22 described in the above-described first embodiment, and the overlapping description will be omitted. And
- the driver amplifier 22 has a source connected to a connection point between each of the transistors Tr 3 to Tr 5 of the current mirror circuit 31 and the constant current source I ref and a drain grounded as a supply power variable circuit.
- the gate has a MOS transistor 35 connected to the RAKE demodulation unit 3.
- Such a MOS transistor 35 is configured such that the polarity of the control voltage from the RAKE demodulation unit 3 is inverted with respect to the gate and input to the gate. The amount of current flowing between the source and the drain is changed accordingly.
- NMOS n-channel MOS transistor
- a source-drain connection is made according to the positive control voltage applied to the gate.
- the amount of current flowing from the constant current source I ref is controlled.
- the control voltage indicating the large transmission power is inverted in the gate of the MOS transistor 35. Supplied.
- the mobile phone according to the second embodiment supplies the control voltage to the base of the MOS transistor 35, so that the power Tr The amount of flowing current can be controlled.
- a MOS transistor 35 is provided as a supply power variable circuit of the driver amplifier 22, and the control voltage is applied to the gate of the MOS transistor 35 to flow through the driver amplifier 22. It controlled the amount of current.
- the driver amplifier 22 provided in the mobile phone according to the third embodiment enables stable control of the amount of current by the control voltage even when the MOS transistor having the characteristic variation is used. It is.
- FIG. 6 shows a circuit diagram of driver amplifier 22 provided in the mobile phone according to the third embodiment. Note that, in FIG. 6, the same reference numerals are given to the portions showing the same operation as the respective portions of the driver amplifier 22 described in the above-described first embodiment, and the repeated description will be omitted.
- the supply power variable circuit includes a differential voltage-current conversion circuit 40, a first current mirror circuit 41, and a second current mirror circuit 42. .
- the differential voltage-to-current conversion circuit 40 is composed of a transistor Tr 6 and a transistor Tr 7 to each of which a control voltage from the Rake demodulation unit 3 is differentially input to a base.
- This differential voltage-to-current conversion circuit 40 has MOS transistors Mos 1 and Mos 2 as active elements as electronic loads (active dummy loads).
- the source of the MOS transistor Mos 1 is connected to the constant voltage source VCC, and the drain is connected to its own gut and the collector of the transistor Tr 6 of the differential voltage-to-current converter 40.
- the gate of the MOS transistor Mos1 is connected to the gate of the MOS transistor Mos3 whose source is connected to the constant voltage source VCC.
- the source of the MOS transistor Mos 2 is connected to the constant voltage source VCC, and the drain is connected to its own gate and the collector of the transistor Tr 7 of the differential voltage-to-current converter 40.
- each of the MOS transistors Mos 1 and Mos 2 is an active collector load of the differential voltage-to-current conversion circuit 40.
- a configuration in which the above-described control voltage serving as a differential input is supplied to the bases of the transistors Tr 6 and Tr 7 of the differential voltage-to-current conversion circuit 40.
- a control voltage is supplied to the transistor Tr 6 and a fixed bias voltage is supplied to the transistor Tr 7. do it.
- the first current mirror circuit 41 has a transistor Tr 9 and a transistor Tr 8 whose bases are connected to each other.
- the transistor Tr8 has an emitter grounded, and has a collector connected to the emitters of the transistors Tr6 and Tr7 of the differential voltage-current conversion circuit 40. I have.
- the transistor Tr9 of the first current mirror circuit 41 has an emitter grounded and a collector connected to the constant current source Iref2.
- the collector of the transistor Tr9 of the first current mirror circuit 41 is connected to a connection point between the transistor Tr9 and the base of the transistor Tr8.
- the second current mirror circuit 42 has a transistor Tr 10 and a transistor Tr 11 whose bases are connected to each other.
- the transistor Tr 10 has an emitter grounded, and has a collector connected to a connection point between the transistor r 5 of the current mirror circuit 31 and the constant current source I ref 1.
- the transistor Tr 11 of the second current mirror circuit 42 has an emitter grounded, and a collector connected to its own base and the drain of the MOS transistor Mos 3.
- each transistor of the second current mirror circuit 42 via the MOS transistor Mos 3 Tr 10 and Tr 11 are turned on. That is, the transistors Tr 10 and Tr 11 of the current mirror circuit 42 are turned on by a current equivalent to the control voltage.
- the current flowing through the transistor Tr 5 of the current mirror circuit 31 is bypassed via the transistor Tr 10 of the second current mirror circuit 42. Therefore, the amount of current flowing through the driver amplifier 22 can be controlled according to the control voltage.
- the variable power supply circuit of the driver amplifier 22 provided in the mobile phone according to the third embodiment includes an I ref 2 connected to the constant voltage source VCC to which the constant current source I ref 1 is connected.
- the constant-current source I ref 2 obtains a current having a current value corresponding to the control voltage from the constant current source I ref 2 by controlling ON / OFF of the differential voltage-to-current conversion circuit 40 with the control voltage. Then, a current having a current value corresponding to the control voltage is supplied to the first and second current mirror circuits 41, Mirroring is performed by 42, and the current flowing through the driver amplifier 22 is bypassed by the second current mirror circuit 42.
- the above-described bypass control can be performed using the constant current sources I ref 1 and I ref 2 connected to the same constant voltage source VCC. Even when the characteristic of Mos3 has an absolute variation, the power consumption of the driver amplifier 22 can be accurately controlled, and the same effects as those of the above-described embodiments can be obtained.
- the relative variation between the MOS transistors Mosl to Mos3 is not a problem because the MOS transistors Trans1 to Mos3 are guaranteed to some extent when the MOS transistors Mos1 to Mos3 are formed on the same wafer. .
- the present invention is applied to a W-CDMA mobile phone.
- the present invention is applicable to any device that controls output level, for example, according to the IS-95 standard.
- Applicable to other devices such as compatible CDMA mobile phones, PHS phones (Personal Handyphone System), PDA devices (Personal Digital (Data) Assistant) with communication functions, and / or personal computers.
- PHS phones Personal Handyphone System
- PDA devices Personal Digital (Data) Assistant
- power control is performed on the driver amplifier 22, power control may be performed on another amplifier such as a power amplifier.
- the present invention uses the gain control information of the variable gain amplifying means to control the amount of power supplied from the power supply means to the fixed gain amplifying means located downstream of the variable gain amplifying means.
- the amount of power supplied to the fixed gain amplifying means at the time of low output of the amplifying means can be greatly reduced, and the power consumption can be significantly reduced without affecting the characteristics.
- the battery of the device to which the present invention is applied can be prolonged through the reduction in power consumption.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transmitters (AREA)
- Mobile Radio Communication Systems (AREA)
- Amplifiers (AREA)
- Control Of Amplification And Gain Control (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2004800001899A CN1698266B (zh) | 2003-03-07 | 2004-03-03 | 通信终端设备与放大电路 |
EP04716749A EP1610457B1 (en) | 2003-03-07 | 2004-03-03 | Communication terminal device and amplification circuit |
US10/513,252 US7539468B2 (en) | 2003-03-07 | 2004-03-03 | Communication terminal device and amplification circuit |
DE602004027020T DE602004027020D1 (de) | 2003-03-07 | 2004-03-03 | Kommunikationsendgerät und verstärkungsschaltung |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-062297 | 2003-03-07 | ||
JP2003062297A JP3907052B2 (ja) | 2003-03-07 | 2003-03-07 | 通信端末装置及び増幅回路 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004079899A1 true WO2004079899A1 (ja) | 2004-09-16 |
Family
ID=32959000
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/002652 WO2004079899A1 (ja) | 2003-03-07 | 2004-03-03 | 通信端末装置及び増幅回路 |
Country Status (7)
Country | Link |
---|---|
US (1) | US7539468B2 (ja) |
EP (1) | EP1610457B1 (ja) |
JP (1) | JP3907052B2 (ja) |
KR (1) | KR101034873B1 (ja) |
CN (1) | CN1698266B (ja) |
DE (1) | DE602004027020D1 (ja) |
WO (1) | WO2004079899A1 (ja) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
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US20070064833A1 (en) * | 2005-09-12 | 2007-03-22 | Sahota Gurkanwal S | Multi-band radio frequency modulator |
US8920343B2 (en) | 2006-03-23 | 2014-12-30 | Michael Edward Sabatino | Apparatus for acquiring and processing of physiological auditory signals |
US20070270111A1 (en) * | 2006-05-19 | 2007-11-22 | Broadcom Corporation | Dual power mode transmitter |
US7860467B2 (en) * | 2006-08-29 | 2010-12-28 | Broadcom Corporation | Power control for a dual mode transmitter |
JP5245459B2 (ja) | 2008-03-04 | 2013-07-24 | 富士通株式会社 | 無線端末装置及び送信電力制御方法 |
CN101489299B (zh) | 2009-02-26 | 2012-05-02 | 华为技术有限公司 | 一种基站载频功放的控制方法、装置及系统 |
US9306502B2 (en) * | 2011-05-09 | 2016-04-05 | Qualcomm Incorporated | System providing switchable impedance transformer matching for power amplifiers |
US8786373B2 (en) * | 2012-02-21 | 2014-07-22 | Calogero D. Presti | Adjustable bypass circuit for a supply voltage for an amplifier |
US8970297B2 (en) | 2012-03-19 | 2015-03-03 | Qualcomm Incorporated | Reconfigurable input power distribution doherty amplifier with improved efficiency |
US9031518B2 (en) | 2012-12-17 | 2015-05-12 | Qualcomm Incorporated | Concurrent hybrid matching network |
CN103490738B (zh) * | 2013-07-01 | 2016-09-21 | 络达科技股份有限公司 | 可调增益放大器 |
CN103546106A (zh) * | 2013-10-21 | 2014-01-29 | 杜一敏 | 信号放大电路 |
CN110504933A (zh) * | 2019-08-07 | 2019-11-26 | 宁波大学 | 一种高线性可变增益放大器 |
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- 2003-03-07 JP JP2003062297A patent/JP3907052B2/ja not_active Expired - Fee Related
-
2004
- 2004-03-03 WO PCT/JP2004/002652 patent/WO2004079899A1/ja active Application Filing
- 2004-03-03 EP EP04716749A patent/EP1610457B1/en not_active Expired - Fee Related
- 2004-03-03 US US10/513,252 patent/US7539468B2/en not_active Expired - Lifetime
- 2004-03-03 KR KR1020047017823A patent/KR101034873B1/ko not_active IP Right Cessation
- 2004-03-03 DE DE602004027020T patent/DE602004027020D1/de not_active Expired - Lifetime
- 2004-03-03 CN CN2004800001899A patent/CN1698266B/zh not_active Expired - Fee Related
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JPH0621732A (ja) * | 1992-07-03 | 1994-01-28 | Seiko Epson Corp | 演算増幅器 |
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Also Published As
Publication number | Publication date |
---|---|
US7539468B2 (en) | 2009-05-26 |
JP2004274390A (ja) | 2004-09-30 |
EP1610457A1 (en) | 2005-12-28 |
DE602004027020D1 (de) | 2010-06-17 |
EP1610457A4 (en) | 2006-06-14 |
KR20050107296A (ko) | 2005-11-11 |
EP1610457B1 (en) | 2010-05-05 |
JP3907052B2 (ja) | 2007-04-18 |
US20060057981A1 (en) | 2006-03-16 |
CN1698266A (zh) | 2005-11-16 |
KR101034873B1 (ko) | 2011-05-17 |
CN1698266B (zh) | 2013-03-06 |
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