WO1994017598A1 - Communication apparatus - Google Patents
Communication apparatus Download PDFInfo
- Publication number
- WO1994017598A1 WO1994017598A1 PCT/JP1994/000078 JP9400078W WO9417598A1 WO 1994017598 A1 WO1994017598 A1 WO 1994017598A1 JP 9400078 W JP9400078 W JP 9400078W WO 9417598 A1 WO9417598 A1 WO 9417598A1
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- WIPO (PCT)
- Prior art keywords
- power
- control
- transmission
- voltage
- transmission power
- Prior art date
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Classifications
-
- 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
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
- 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
- H03G3/3047—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers in modulators, frequency-changers, transmitters or power amplifiers for intermittent signals, e.g. burst signals
Definitions
- the present invention relates to a communication apparatus which is used in a digital mobile communication system or the like, and which prevents an occurrence of an overshoot in which transmission power is exhausted when starting transmission or switching to reduce transmission power.
- the TDMA Time Division Multiple Access
- transmission is performed in a time slot allocated at the transmission / reception frequency of the communication device, and transmission is performed, and transmission power in intermittent transmission (burst transmission) in this case is stabilized. I have.
- the received electric field strength at the cell base station that receives the transmitted radio waves from the mobile station moving in the cell fluctuates. Therefore, the magnitude of the transmission power from the mobile station is determined based on the instruction signal from the cell base station. L, control is performed after switching. For example, if the mobile station power is close to the cell base station, the transmission power of the mobile station should be reduced to avoid human power saturation (cross-modulation) due to the strong electric field at the cell base station that receives the transmitted radio waves from the mobile station. The control to lower it is performed.
- the mobile station when the mobile station is far from the Senor base station, the input electric field strength at the cell base station that receives the radio wave transmitted from the mobile station is increased, and the mobile station is used to maintain a stable reception state. Control to increase transmission power Is wearing. Furthermore, the mobile station also performs closed-loop control of transmission power stabilization to prevent fluctuations in transmission power after controlling the magnitude of transmission power. For example, when the transmission power of the mobile station is relatively large, the output power of the mobile station and the cell base station can be reduced by preventing the output power from decreasing due to the heat generated by the final-stage power amplifier and the fluctuation of the power supply voltage. A stable transmission state is maintained.
- FIG. 1 is a block diagram showing a configuration of a conventional communication device that performs closed loop control of transmission power.
- this communication device is input to a transmission high-frequency signal Pa power ⁇ variable gain circuit 2 through an input terminal 1.
- the transmission power Po power which is obtained by amplifying the transmission high-frequency signal Pa from the variable gain circuit 2, is output from the power amplifier 3.
- the transmission power Po from the power amplifier 3 is transmitted to the antenna 6 through a branch circuit 4 such as a directional coupler for branching and passing the power, and a duplexer 5 for transmitting and receiving the antenna.
- the transmission power Po is transmitted from the antenna 6 as a radio wave Wa.
- the radio wave Wb from the cell base station or the like is received by the antenna 6, and the received signal is input to the receiver 10 through the duplexer 5.
- the receiving unit 10 performs frequency conversion and demodulation.
- the demodulated signal indicates the magnitude of the transmission power Po from the mobile station based on the electric field strength when the cell base station or the like receives the radio wave Wa from the mobile station equipped with the device, not shown.
- the transmission power switching instruction information Sa is input to the control unit 12 using a CPU or the like. Further, the transmission power Po is branched from the branch circuit 4 and output to the detection circuit 7.
- the detection circuit 7 performs envelope detection on the high-frequency signal branched by the branch circuit 4, and inputs the detection signal Sb indicating the level of the high-frequency signal to one input terminal of the error amplifier 8.
- an analog port for controlling the gain of the variable gain circuit 2 to the transmission power Po based on the transmission power switching instruction information Sa from the receiving unit 10 is provided to the other input terminal of the error amplifier 8.
- the reference voltage Sc is input from the D connector A 13.
- the error amplifier 8 outputs a difference signal based on the voltage difference between the detection signal Sb and the reference voltage Sc input to the two input terminals. This difference signal is input to the loop filter 9 to remove noise, perform power and smoothing, and then input to the sampling hold (SZH) circuit 11.
- the sampling pulse Cp which is synchronized with the timing of the transmission time slot, is input to the sampling and holding circuit 11 from the control unit 12, and at the timing of the transmission time slot, an internal switch (not shown) is switched to a conductive state. Pass the difference signal from loop filter 9. In this case, in another transmission time slot other than the one assigned to the device, the switch is switched to the non-conductive state, and the transmission of the difference signal from the loop filter 9 is stopped.
- a capacitor provided in the sampling Z-hold circuit 11 charges and holds the voltage of the difference signal from the loop filter 9.
- the charging voltage held by this capacitor ⁇ The control voltage is input to the control terminal of the variable gain circuit 2 as a control voltage, and the gain of the variable gain circuit 2 is controlled. That is, the voltage of the detection signal Sb from the detection circuit 7 input to one input terminal of the error amplifier 8 sets the magnitude of the transmission power from a cell base station or the like input to the other input terminal.
- the gain of the variable gain circuit 2 is reduced, and the transmission power Po from the power amplifier 3 is reduced.
- the transmission power Po from the power amplifier 3 is increased by increasing the gain of the variable gain circuit 2. 17598/7
- the transmission power Po of the power amplifier 3 is controlled by controlling the gain of the variable gain circuit 2 and the transmission power switching instruction information S for instructing the setting of the magnitude of the transmission power from the cell base station or the like.
- the control power is adjusted based on a, and the control power of the closed loop for making the transmission power Po after this adjustment constant at a predetermined power is performed.
- transmission activation when the transmission starts at the start of transmission operation (hereinafter referred to as transmission activation) and when the transmission power is switched, transmission is performed at the beginning of transmission activation. An overshoot in which the power becomes large occurs.
- the control of the transmission power by the closed loop control becomes impossible.
- the transmission is started in this state, the transmission is performed at the maximum transmission power P o, and thereafter, the control power of the transmission power P o by the closed loop control based on the detection signal S b from the detection circuit 7 ⁇ the transmission power P o converges to the target value.
- the convergence time is determined by the time constant of the loop fill 9, but until this convergence, the overshooting time will be continued.
- FIG. 2 is a timing chart of a processing signal in the operation of the configuration shown in FIG.
- the transmission time slots of the device are divided into T1, T2,.
- the sampling unit shown in (d) of FIG. The pulse C p is output to the sampling hold circuit 11.
- This sampling pulse C p causes the transmission power shown in (b) in sampling no-hold circuits 11 to Force control signal Vc force ⁇ input to variable gain circuit 2.
- the transmission power control signal Vc has a high voltage at the beginning of the time slot T1 at the beginning of the start of transmission.
- the transmission rises at the time iJtO, the closed loop control cannot be performed in the initial part, and the transmission power Po from the power amplifier 3 becomes larger than the target value.
- an overshoot occurs.
- Such an overshoot also occurs when the transmission power Po is switched low, in addition to the initial stage at the start of transmission. That is, the transmission power control signal Vc at the previous large transmission power Po is charged and held in a capacitor (not shown) in the sampling hold circuit 11.
- This transmission power control signal Vc power is input to the variable gain circuit 2 when the transmission power P o is switched low, and until the closed loop control with the switched small transmission power (P o) converges An overshoot occurs during ⁇ .
- the present invention solves such disadvantages in the conventional technology, and the transmission power is reduced when starting transmission or switching to reduce transmission power.
- a communication device capable of reducing the power durability of a transmission power path without causing an overshoot that increases and preventing an adverse effect on reception at another time slot due to an overshoot.
- a communication device comprises: a variable power amplifying means for transmitting transmission power according to a control voltage; and a detecting means for detecting a level of transmission power from the variable power amplifying means.
- a reference voltage generating means for generating a reference voltage for controlling the magnitude of the transmission power from the variable power amplifying means, and a difference signal obtained by comparing the detected voltage from the detecting means with the reference voltage from the reference voltage generating means.
- Control voltage setting means for setting the control voltage to the power without adding the control voltage to the transmission power from the variable power amplifying means in the initial part of the transmission power from the variable power amplifying means at the time of switching to reduce the transmission power. It is a good result.
- variable power amplifying means according to claim 1 transmits the input transmission high-frequency signal at the start of transmission or at the time of switching to reduce the transmission power by setting the control voltage and control voltage setting means from the control means.
- the configuration includes a variable gain circuit that is set to a power at which the transmission power does not increase, and a power amplifier that amplifies and outputs a transmission high-frequency signal from the variable gain circuit.
- the variable power spreading means in the communication device, comprises a power amplifier in which a collector voltage of a preceding amplification transistor element in a plurality of stages of widening transistor elements is controlled, and a control voltage from the control means.
- the L ⁇ control voltage is changed to the preamplifier transistor.
- a voltage control circuit applied to the collector of the element.
- a communication device comprising: In the initial part, the amplification degree is set so that the transmission power from the pre-stage amplification transistor element does not increase.
- the variable power amplifying unit includes: a power amplifier configured to control a base voltage of a preceding stage amplifying transistor element in a plurality of stages of amplifying transistor elements; At the start of transmission or when the transmission power is reduced by setting the voltage and control voltage setting means, at the time of switching, the pre-amplification transistor in the initial part of the input transmission high-frequency signal. And a voltage control circuit applied to the base of the evening element.
- the communication device is configured such that a base voltage of the preamplifier transistor element according to claim 5 is set with a noisy voltage through a resistor, and a control voltage from a voltage control circuit is set through the resistor. In this configuration, the amplification degree is set so that the transmission power from the pre-amplification transistor element does not increase in the initial portion of the input transmission high-frequency signal by changing the bias voltage.
- control voltage setting unit sets the control voltage from the control unit to power when the transmission power is not increased.
- a DA converter that converts data to analog voltage and sends it out, a capacitor that charges and holds the voltage from the DZA converter, and a variable power amplifier that starts transmission or switches to lower transmission power
- a switching unit for transmitting a voltage from the condenser as a control voltage to the variable power amplifying unit in an initial part of the transmission power of the power unit.
- control voltage setting means according to claim 1 is
- a pulse width modulation circuit for generating and transmitting a pulse width modulation signal
- a smoothing means for smoothing and outputting the pulse width modulation signal from the pulse width modulation circuit, a capacitor for charging and holding the voltage from the smoothing means, and at the time of starting transmission or switching to reduce the transmission power.
- a switching means for transmitting a voltage from the condenser as a control voltage to the variable power amplifying means in an initial part of transmission power from the variable power width means.
- the communication device has a configuration in which a mouth-pass filter is used for the smoothing means according to the sixth embodiment.
- the communication device is characterized in that the control voltage setting means according to claim 1 is configured such that, at the start of transmission or at the time of switching to reduce the transmission power, an initial part of the transmission power from the variable power amplification means has a variable power amplification. It has a resistor grounding means for grounding the control end to which the control voltage of the means is manually applied through a resistor.
- the communication device is configured to use an analog switch that is turned on / off under the control of the switching control means, as the resistor grounding means.
- the communication device has a configuration in which a transistor switch circuit that is turned on and off under the control of the switching control means is used as the resistor grounding means.
- the communication device is the transistor switch circuit according to claim 12, wherein the collector of the pnp transistor is connected to a control terminal to which a control voltage of a variable power / width device is input, and is connected to a base.
- the control signal from the switching control means is input, the control voltage from the control means is not increased in transmission power at the time of transmission, and the power setting data is converted to analog voltage and transmitted.
- An analog signal from A Comparator is input.
- the communication device according to claim 14 is configured to use, as the resistor grounding device according to claim 8, a C-MOS analog switch that is turned on and off under the control of the switching control device.
- the control voltage setting means in the communication device, is connected in series to a switch for passing or non-passing the difference signal from the comparing means and an input side of the difference signal in the switch.
- a resistor connected between the output side of the switch and ground, operates as a filter together with the resistor when the switch force ⁇ conducts, and a capacitor that holds the voltage from the DA converter when the switcher ⁇ non-conductivity.
- the communication device is a communication device according to claim 1, wherein the control voltage setting unit according to claim 1 includes a first switch that passes or does not pass the difference signal from the comparison unit, and an input of the difference signal in the first switch. And a resistor connected in series with the first switch, connected between the output side of the first switch and ground, and acting as a filter together with the resistor in the case of the first switcher conduction, A capacitor that holds the voltage from the D / A converter when the first switch is non-conductive, and a second switch that conducts when the first switch power is non-conductive and applies the voltage from the DZA converter to the capacitor. Switching control means for controlling the first switch to be non-conductive and for controlling the force and the second switch to be conductive.
- a communication device is configured such that the second switch according to the sixteenth aspect uses an analog switch that is turned on and off under the control of the switching control means.
- the communication device is configured to use a transistor switch circuit that is turned on and off under the control of the second switch force switching control means according to claim 16.
- the communication device wherein the transistor switch circuit according to claim 18 is configured such that a collector of the npn-type transistor is connected to a control terminal to which a control voltage of a variable power / width means is manually input, The control signal is input to the base from the switching control means, and a resistor is connected between the emitter and the ground.
- the communication device is the transistor switch circuit according to claim 18, wherein the collector of the pnp transistor is connected to the control terminal to which the control voltage of the variable power / width means is input, and is connected to the base.
- the control signal is input from the switching control means, and a resistor is connected between the emitter and the ground. The resistor is connected to the power supply terminal of the power supply.
- the communication device according to claim 21 is configured such that the second switch according to claim 16 uses a C-M0S analog switch that is turned on / off by control from switching control means.
- the communication device according to claim 22 transmits the initial part of the transmission power from the variable power amplification means at the start of transmission or at the time of switching to reduce the transmission power at the start of transmission in the TDMA system. This is the configuration that is the initial part of the time slot.
- the communication device wherein the reference voltage generation means according to claim 1 converts the data signal from the control means for instructing the magnitude of the transmission power output from the variable power amplification means to an analog voltage. It has a DA converter that outputs the converted reference voltage to the comparison means.
- a communication device wherein the reference voltage generating means according to claim 1 determines a data signal indicating a magnitude of transmission power output from the variable power amplification means based on the received demodulated data. And a D / A converter that outputs a reference voltage obtained by converting the digital data from the determination control means into an analog voltage to a comparison means.
- variable power amplifying means controls a human-operated high-frequency signal to a gain based on a control voltage and outputs the variable gain amplifier circuit.
- a power amplifier circuit that outputs transmission power obtained by amplifying a high-frequency signal from the circuit.
- control voltage setting means according to claim 1 is provided on the input side of the comparing means, and the transmission power from the variable power amplifying means at the start of transmission or at the time of switching to reduce the transmission power.
- the control voltage is set to L, power at which the transmission power does not increase.
- the communication device according to claim 27 is provided on the output side of the control voltage setting means and the power comparison means according to claim 1, and at the time of starting transmission or reducing transmission power. O
- the control voltage is set to the power at which the transmission power does not increase in the initial part of the transmission power from the variable power spreading means at the time of switching.
- the transmission power ⁇ the non-increased control power ⁇ is performed in the initial part of the transmission start at the transmission power. Furthermore, the transmission power is controlled to the transmission power based on the reference voltage. Therefore, at the time of starting the transmission or at the time of switching to reduce the transmission power, the power withstand power of the transmission power path can be reduced without causing an overshoot that increases the transmission power. In addition, the overshoot prevents adverse effects on reception at other time slots, such as cross modulation.
- FIG. 1 is a block diagram showing a configuration of a conventional communication device that performs closed loop control of transmission power.
- FIG. 2 is a timing chart of the processing signal in the operation of the configuration shown in FIG.
- FIG. 3 is a block diagram showing the configuration of the first embodiment of the communication device of the present invention.
- FIG. 4 is a circuit diagram showing a detailed configuration of the loop filter with a hold function shown in FIG.
- FIG. 5 is a timing chart of the processing signal of the operation in the configuration of the first embodiment.
- FIG. 6 is a block diagram showing the configuration of the second embodiment.
- FIG. 7 is a block diagram showing the configuration of the third embodiment.
- FIG. 8 is a block diagram showing, as a partial circuit, a configuration for controlling the collector voltage in the third embodiment.
- FIG. 9 is a block diagram partially showing a circuit for controlling the base voltage in the third embodiment.
- FIG. 10 is a circuit diagram showing a configuration of a semiconductor switch circuit using a transistor according to the fourth embodiment.
- FIG. 11 is a circuit diagram showing a configuration of a semiconductor switch circuit using a C-M0S analog switch element in the fourth embodiment.
- FIG. 12 is a circuit diagram showing a configuration of a semiconductor switch circuit using a transistor in the fifth embodiment.
- FIG. 13 is a block diagram showing the configuration of a semiconductor switch circuit using different transistors in the fifth embodiment.
- FIG. 16 is a block diagram illustrating a configuration of a sixth embodiment using a loose width modulation signal generator and a single pass filter.
- FIG. 15 is a diagram showing processing signals in the operation of the sixth embodiment.
- FIG. 16 is a block diagram showing the configuration of the seventh embodiment provided on the input side of the analog switch and the D / A converter error amplifier.
- FIG. 17 is a block diagram showing a configuration of an eighth embodiment in which an analog switch and a DZA converter are provided on the input side of an error amplifier.
- FIG. 3 is a block diagram showing the configuration of the first embodiment of the communication device of the present invention.
- the first embodiment is a variable gain circuit 22 that controls an input transmission high-frequency signal Pa based on a transmission power control signal Vc and outputs the same.
- a power amplifier 23 that outputs transmission power Po obtained by amplifying these transmission high-frequency signals.
- a branch circuit 24 such as a directional coupler for branching and passing the transmission power Po from the power amplifier 23, a duplexer 25 for sharing antennas for transmission and reception, and a cell base station (not shown)
- an antenna 26 for transmitting and receiving radio waves Wa and Wb in a wireless line.
- the communication device also includes a detection circuit 27 that performs envelope detection on a high-frequency signal obtained by branching the transmission power Po by the branch circuit 24 and outputs a detection signal Sa indicating the level of the high-frequency signal.
- the voltage of the detection signal Sa from the circuit 27 is input to one input terminal, and transmission is performed based on transmission power switching instruction information Sb from a cell base station or the like as described in detail below. It has a reference voltage Sc for controlling the gain of the variable gain circuit 22 for the power Po, and an error amplifier 28 that is input to the other input terminal and outputs the difference signal Sd.
- a loop filter with a hold function 29 demodulates a received signal received through the antenna 26 and the duplexer 25 through a radio line with the cell base station, and transmits the transmission power from the cell base station or the like.
- a receiving unit 30 for transmitting transmission power switching instruction information Sa for instructing the setting of the size.
- the communication apparatus outputs switching control signals C a and C b for instructing the setting of the transmission power from the cell base station or the like based on the transmission power switching instruction information S b from the receiving unit 30.
- Control unit 3 2 and control A DZA converter 33 that converts the reference voltage Sc based on the transmission power switching instruction information Sb from the unit 32 into an analog signal and outputs the analog voltage to the other input terminal of the error amplifier 28.
- the transmit power control signal Vc from the loop filter 29 with the hold function is set to the target value.
- the analog switch: 34 input to the movable contact c and the transmit power Po from the power amplifier 23 are set to the target values.
- a DZA converter 35 that converts the power setting signal C c from the control unit 32 into an analog signal and outputs the analog signal to the fixed contact c of the analog switch 34.
- FIG. 4 is a circuit diagram showing a detailed configuration of the loop filter with a hold function 29 shown in FIG.
- the loop filter 29 with a hold function has a configuration in which a conventional sampling hold circuit and a loop filter are combined, and is connected to the output terminal of the error amplifier 28 to reduce the difference signal S d. It has an input terminal 29a to be input, and an output terminal 29b connected to the control terminal of the variable gain circuit 22 and the movable contact c of the analog switch 34 to output the transmission power control signal Vc. I have.
- a control terminal 29 c connected to the control unit 32 and receiving the switching control signal C a is provided between the input terminal 29 a and the output terminal 29 b, and a control terminal 29 c
- the switching control signal C a is high (H) level to turn on, ie, on (ON), and low (L) level, non-conduction state to off (OFF).
- H high
- L low
- the analog signal from the DA converter is placed between the analog switch and the ground.
- Electricity a capacitor C1 for charging and holding the voltage of the force setting signal Cc.
- This communication device is connected in series between the input terminal 29a and the analog switch 29d, and when the analog switch 29d conducts, the RC (resistor, capacitor) low-pass filter together with the capacitor C1 is connected. It has a resistor R1 to configure.
- FIG. 5 is a timing chart showing the processing signal of the operation in the configuration of the first embodiment and the timing of this signal.
- the device performs transmission in the section of the transmission time slots Tl, T2, ... shown in (a) of Fig. 5.
- the control unit 32 is set to the high level (see (e) in FIG. 5) during the time t 1 of the time slot T m before the transmission time slot T 1 for starting the transmission.
- the level switching control signal Cb is output to the analog switch 34, and the analog switch 34 is turned on (ON).
- the switching control signal C a of the control unit 32 is at the mouth — (L) level, and the switching control signal C a is transmitted through the control terminal 29 c of the loop filter 29 with the hold function to the analog switch 2. Input to 9d, analog switch 29d is turned off (OFF). Therefore, as shown in (b) in FIG. 5, the transmission power control signal V c from the loop filter with hold function 29 to the variable gain circuit 22 has a low output impedance of the D / A converter 35, It becomes equal to the voltage of the analogized power setting signal Cc output from the D / A converter 35.
- the transmission power control signal V is input to the control terminal of the variable gain circuit 22, and the transmission power Po from the power amplifier 23 is set to the target value.
- the analogized power setting signal C from the DZA converter 35 The voltage of c is charged in the capacitor C1, and this charged voltage is maintained.
- control signal Cb goes to the low (L) level and analog switch 34 is turned off (OFF).
- the switching control signal Ca from the control unit 32 becomes high (H) level.
- This high (H) level is maintained during the transmission time slot T1, and the analog switch 29 during the loop filter with hold function 29 is turned on (ON) at the high (H) level of the switching control signal Ca. ).
- the analog switch 29 d is turned on, the closed loop control force is performed. That is, a reference voltage S c based on transmission power switching instruction information S b for instructing a setting of transmission power from a cell base station or the like input to the other human terminal of the error amplifier 28, and Is compared with the voltage of the detection signal Sa from the detection circuit 27, which is input to the input terminal of.
- the difference signal Sd due to this comparison is output to the loop filter 29 with the error function.
- the analog switch 29 d was turned on (0 N) to connect the resistor R1 and the capacitor C1, and the RC filter removed noise and smoothed it.
- the transmission power control signal Va is input to the control terminal of the variable gain circuit 22.
- the gain control of the variable gain circuit 22 is performed based on the transmission power control signal Vc, and the transmission power Po from the power amplifier 23 is set to a target value V ⁇ based on the transmission power switching instruction information Sb.
- the charging voltage of the capacitor C1 of the loop filter 29 with the hold function is input to the control terminal of the variable gain circuit 22 as the transmission power control signal Vc. .
- the transmission power control signal Vc controls the gain of the variable gain circuit 22 so as to set the transmission power Po from the power amplifier 23 to a target value. Therefore, as shown in (c) of FIG. 5, the overshoot force ⁇ no longer occurs in the initial portion of the transmission power Po from the power amplifier 23. Further, since the error of the transmission power control voltage Vc is small L in the initial part of the transmission time slot T1, the transmission power Po in the transmission time slot T1 converges to the target value at high speed.
- FIG. 6 is a block diagram showing the configuration of the second embodiment.
- a discharging resistor R2 is provided as a fixed terminal of the analog switch 34. And between the ground.
- Other configurations are the same as those shown in FIGS. 1 and 2.
- FIG. 7 is a block diagram showing the configuration of the third embodiment.
- FIG. 8 shows the collector voltage of the preamplifier in the power amplifier 23 in the third embodiment.
- FIG. 9 is a block diagram partially showing a configuration for controlling a base voltage of a pre-amplifier in a power amplifier 23 in the third embodiment. .
- a voltage control circuit 40 connected to the movable terminal c of the analog switch 34 in the first embodiment shown in FIG. 3, a voltage control circuit 40 Amplifier 23 is connected.
- a buffer amplifier 22 a is provided in place of the variable gain circuit 22, and a high-frequency signal from the buffer amplifier 22 a is input to the power amplifier 23.
- Other configurations are the same as those shown in FIGS. 1 and 2.
- the power amplifier 23 is a pre-amplifier including a transistor Q1, a load resistor RL, bias setting resistors R5 and R6, emitter resistors R7, and coupling capacitors C5 and C6.
- a circuit 23a and a final-stage amplifier circuit 23b that outputs the transmission power Po are provided.
- a voltage is applied from the voltage control circuit 40a to the collector of the transistor Q1 of the preamplifier circuit 23a through the load resistor RL.
- the power amplifier 23 includes a transistor Q 2, a load resistor RL, a bias setting resistor R 6, an emitter resistor R 7, and a preamplifier circuit 23 a including a coupling capacitor C 5,
- a final stage width circuit 23b is provided.
- a voltage is applied to the collector of the transistor Q2 of the first stage width circuit 23a through the load resistor RL, and a bias setting voltage is applied to the base from the voltage control circuit 40b through the resistor R8. It has become.
- this operation operates in the same manner as in the examples of FIGS. That is, the transmission power control signal V c input to the voltage control circuit 40 c, a voltage is applied from the voltage control circuit 40a to the collector of the transistor Q1 through the load resistor RL. Based on this voltage, L is applied to the power amplifier 23 (final stage amplifier) as shown in (c) of FIG. The transmission power Po from the circuit 23b) is set to the target value, and no ono-shoot occurs in the initial portion at this transmission power Po.
- the operation in this example also operates in the same manner as the examples in FIGS. 3 and 5.
- the transmission power control signal Vc input to the voltage control circuit 40b.
- a bias setting voltage is applied from the voltage control circuit 4 Ob to the base of the transistor Q2 through the resistor 8, and the power amplifier 23 as shown in (c) of FIG. (Last-stage amplifier circuit 23b)
- the transmission power Po of the power is set to the target value, and the overshoot does not occur in the initial part of this transmission power Po.
- FIG. 10 is a circuit diagram showing a configuration of a semiconductor switch circuit using transistors in place of the analog switch 34 shown in FIG. 3 in the fourth embodiment.
- FIG. 11 is a circuit diagram showing a configuration using a C-MOS analog switch element in place of the analog switch 34 shown in FIG. 3 in the fourth embodiment.
- the semiconductor switch circuit 36 shown in FIG. 10 includes a transistor Q3 that performs switching (ON * OFF), a bias setting resistor R1 between the base and the emitter of the transistor Q3, and the resistor R1 and the transistor Q3.
- the base is connected to the control unit 32 via the resistor R2.
- the transmission power control signal Vc power is supplied and the transistor Q3 emits
- the base force control unit 32 of the transistor Q3 is also connected to the base force control unit 32 of the transistor Q3 and supplied with the switching control signal Cb.
- the semiconductor switch circuit 36 shown in FIG. 11 is connected to the control terminal of the variable gain circuit 22 and the loop filter 29 having a hold function for transmission output of the C-MOS analog switch element 42. Power control signal Vc power ⁇ supplied. Further, the input terminal is connected to the DZA converter 35, and the switching control terminal is connected to the control unit 32 directly and through the inverter 43 to receive the switching control signal Cb.
- the transistor Q 3 is turned on (conducted) by the high (H) level switching control signal Cb from the control unit 32.
- the operation in this case is similar to that of the first embodiment shown in FIGS.
- the semiconductor switch circuit 36 in FIG. 11 also turns on (conducts) the C-MOS analog switch element 42 by the high (H) level switching control signal C from the control section 32.
- the operation in this case is the same as in the first embodiment shown in FIGS.
- the transmission power Po from the power amplifier 23 is set to the target value, and no overshoot occurs in the initial portion of the transmission power Po.
- FIG. 12 is a circuit diagram showing a configuration of a semiconductor switch circuit 37 using transistors in place of the analog switch 34 shown in FIG. 6 in the fifth embodiment.
- Fig. 13 shows the analog aperture shown in Fig. 6 in the fifth embodiment.
- FIG. 28 is a block diagram showing a configuration of each of semiconductor switch circuits g using transistors having different polarities in place of switch.
- the semiconductor switch circuit 37 shown in FIG. 12 is a pnp transistor Q4 that performs a switching operation (0 N OFF), and the collector of the transistor Q4 is connected to the control terminal of the variable gain circuit 22 and the loop filter 29 with a hold function. Then, the transmission power control signal Vc is supplied, and the emitter of the transistor Q4 is grounded, and the base is connected to the control unit 32 through the resistor R, and the switching control signal Cb is supplied. Be paid. Furthermore, it is grounded by the base discharge resistor R2 (see Fig. 6) of the transistor Q4.
- a semiconductor switch circuit 37 shown in FIG. 13 includes an ⁇ -type transistor Q5 that performs a switching operation (0 N ⁇ OFF), a collector of the transistor Q5 having a control terminal of the variable gain circuit 22 and a loop filter 29 having a hold function. It is connected to supply the transmission power control signal Vc, and is connected to the control unit 32 through the resistor R10 by the base of the transistor Q5 to supply the switching control signal Cb. Also, a resistor Rl 1 is connected between the base of transistor Q5 and the emitter for bias setting. In addition, the emitter is connected to the power supply terminal by a resistor R12, and grounded by a discharging resistor R2 (see Fig. 6). Next, the operation of the fifth embodiment will be described.
- the transistors Q4 and Q5 are turned on (conductive) by the switching control signal of the high (H) level from the control unit 32, and the resistor R2 is grounded.
- the control unit 3 in the initial part of the transmission time slot T1 shown in (a) to (e) in FIG.
- the capacitor C 1 in the loop filter 29 with the hold function shown in FIG. 4 is grounded through the resistor R 2 by the control signal C b from FIG. 4, and the control terminal of the variable gain circuit 22 is grounded at the same time.
- Other operations are the same as those in the first embodiment.
- the gain of the variable gain circuit 22 is set low, and the transmission power Po of the power amplifier 23 does not overshoot ⁇ s.
- FIG. 14 is a block diagram showing the configuration of the sixth embodiment.
- a pulse modulation signal generator and a one-pass filter are used instead of the DZA converter 35 in FIG.
- this example generates a pulse width modulation (PWM) signal based on the power setting signal Cc from the control unit 32 that sets the transmission power Po of the power amplifier 23 to the target value.
- a low-pass filter (LPF) 49 that smoothes the PWM signal from the PWM signal generator 48 and outputs the smoothed PWM signal to the fixed contact a of the analog switch 34.
- PWM pulse width modulation
- LPF low-pass filter
- FIG. 15 is a diagram showing processing signals of the PWM signal generator 48 and the one-pass filter 49 in the operation of the sixth embodiment.
- the pulses shown in (a) and (b) in FIG. Generates a width modulation (PWM) signal from the PWM signal generator.
- PWM width modulation
- This PWM signal is smoothed by a single-pass filter 49, and the DC voltages VH and V shown in (a) and (b) in FIG. 15 are output to the fixed contact a of the analog switch 34.
- Other operations are the same as those shown in Fig. 3. This is the same as the signal processing operation shown in FIG. Also in this case, as shown in (c) of FIG. 5, no overshoot occurs in the initial portion of the transmission power Po from the power amplifier 23.
- FIG. 16 is a block diagram showing the configuration of the seventh embodiment.
- This seventh embodiment is provided on the analog switch 34 shown in FIG. 3, the D / A converter 35 power ⁇ the manpower side of the error amplifier 28.
- the detection signal Sa from the detection circuit 27 is input to the movable contact c of the analog switch 34 a and one input terminal of the error amplifier 28.
- the output terminal of the D / A converter 35a is connected to the fixed contact a of the analog switch 34a.
- the operation is basically performed in the same manner as in the first embodiment shown in FIG. 3, and the power amplifier 23 is controlled so as not to generate an overshoot force in the transmission power Po.
- the control is performed so that the transmission power does not increase in the initial part of the transmission power when the transmission is started or when the transmission power is switched low with respect to the detection signal Sa from the detection circuit 27.
- FIG. 17 is a block diagram showing the configuration of the eighth embodiment.
- the eighth embodiment is provided on the analog switch 34 shown in FIG. 3, the DZA converter 35 ⁇ the output side of the error amplifier 28.
- the difference signal Sd from the error amplifier 28 is input to the movable contact c of the analog switch 34b and the loop filter 29 with a hold function.
- the output terminal of the DZA converter 35b is connected to the fixed contact a of the analog switch 34b.
- the operation is basically performed in the same manner as in the first embodiment shown in FIG. 3, and control is performed so that the transmission power Po of the power amplifier 23 does not cause an overshoot. That is, the control is performed so that the transmission power does not increase in the initial part of the transmission power at the start of transmission or when the transmission power is switched to low with respect to the difference signal S d from the error amplifier 28. .
- the communication device controls the transmission power not to increase at the initial part of the transmission start at the transmission power at the start of transmission or when the transmission power is switched to low. I have.
- the transmission power since the transmission power is controlled to the transmission power based on the reference voltage, the transmission power path does not increase when the transmission is started or when switching to reduce the transmission power. This has the effect of reducing the withstand power of the signal and preventing the adverse effects of overshoot in reception in other time slots, thereby improving the communication quality.
- the communication device according to the present invention is extremely useful as a wireless transmission / reception device in a digital mobile communication system.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
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Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/464,828 US5737697A (en) | 1993-01-25 | 1994-01-21 | Transmission power control circuit for a communication system |
KR1019950703001A KR0165006B1 (ko) | 1993-01-25 | 1994-01-21 | 통신장치 |
DE69433321T DE69433321D1 (de) | 1993-01-25 | 1994-01-21 | Kommunikationsgerät |
EP94904747A EP0681375B1 (en) | 1993-01-25 | 1994-01-21 | Communication apparatus |
FI953542A FI953542A (fi) | 1993-01-25 | 1995-07-24 | Tietoliikennelaitteisto |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5/9922 | 1993-01-25 | ||
JP5009922A JP2937673B2 (ja) | 1993-01-25 | 1993-01-25 | 通信装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1994017598A1 true WO1994017598A1 (en) | 1994-08-04 |
Family
ID=11733589
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1994/000078 WO1994017598A1 (en) | 1993-01-25 | 1994-01-21 | Communication apparatus |
Country Status (9)
Country | Link |
---|---|
US (1) | US5737697A (ja) |
EP (1) | EP0681375B1 (ja) |
JP (1) | JP2937673B2 (ja) |
KR (1) | KR0165006B1 (ja) |
CA (1) | CA2154082A1 (ja) |
DE (1) | DE69433321D1 (ja) |
FI (1) | FI953542A (ja) |
TW (1) | TW237583B (ja) |
WO (1) | WO1994017598A1 (ja) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10190381A (ja) * | 1996-12-27 | 1998-07-21 | Fujitsu Ltd | 送受信装置 |
JP3368464B2 (ja) * | 1998-03-25 | 2003-01-20 | 富士通株式会社 | 送信出力安定化装置 |
JP2000151317A (ja) * | 1998-11-10 | 2000-05-30 | Hitachi Ltd | 送信機および電力増幅器 |
JP2001024454A (ja) * | 1999-07-07 | 2001-01-26 | Matsushita Electric Ind Co Ltd | 自動利得制御装置及び方法、並びに自動利得制御機能を持った無線通信装置 |
US7061313B2 (en) * | 2000-05-05 | 2006-06-13 | Telefonaktiebolaget Lm Ericsson (Publ) | Dual feedback linear amplifier |
DE10057439A1 (de) * | 2000-11-20 | 2002-05-23 | Nokia Mobile Phones Ltd | Spannungsregler für eine gepulste Last, insbesondere für einen Mobiltelefon- oder Telematik-Sender |
US6711389B2 (en) | 2001-02-16 | 2004-03-23 | Telefonaktiebolaget L.M. Ericsson | Power controller for a mobile terminal |
JP2002280911A (ja) * | 2001-03-19 | 2002-09-27 | Nec Corp | 送信回路及びそれを搭載した通信端末 |
DE10132352A1 (de) * | 2001-07-04 | 2003-01-23 | Infineon Technologies Ag | Vorrichtung und Verfahren zur Konstanthaltung der Sendeleistung von Funkgeräten |
DE10307426B4 (de) * | 2003-02-21 | 2006-06-14 | Infineon Technologies Ag | Schaltungsanordnung zum Senden und Empfangen von Funksignalen und Verwendung einer solchen, sowie Verfahren zur Frequenzumsetzung in einer Verstärkungseinrichtung |
EP1604456B1 (en) * | 2003-03-12 | 2011-06-15 | MediaTek Inc. | Closed loop power control of non-constant envelope waveforms using sample/hold |
US7148749B2 (en) * | 2005-01-31 | 2006-12-12 | Freescale Semiconductor, Inc. | Closed loop power control with high dynamic range |
CN1983851B (zh) * | 2006-06-16 | 2010-07-28 | 华为技术有限公司 | 一种使功放支持多功率的方法及射频模块 |
US8340576B2 (en) * | 2010-06-29 | 2012-12-25 | Stmicroelectronics S.R.L. | Electronic circuit for communicating through capacitive coupling |
JP5699758B2 (ja) * | 2011-04-01 | 2015-04-15 | ソニー株式会社 | 受信装置、受信方法、およびプログラム |
US9147636B2 (en) | 2011-06-29 | 2015-09-29 | Stmicroelectronics S.R.L. | Method for verifying the alignment between integrated electronic devices |
US8478213B2 (en) * | 2011-10-14 | 2013-07-02 | Research In Motion Limited | Methods and apparatus for power control |
EP3306576B1 (fr) * | 2016-10-05 | 2023-03-15 | The Swatch Group Research and Development Ltd | Procédé et système d'accès securisé à un espace déterminé au moyen d'un objet portable |
CN108322237B (zh) * | 2017-01-14 | 2020-09-29 | 鸿富锦精密工业(深圳)有限公司 | 干扰抑制系统及方法 |
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JPS60126925A (ja) * | 1983-12-13 | 1985-07-06 | Nec Corp | 自動送信電力制御回路 |
JPS62278823A (ja) * | 1986-05-28 | 1987-12-03 | Hitachi Shonan Denshi Kk | 電力制御回路 |
JPS647719A (en) * | 1987-06-29 | 1989-01-11 | Nec Corp | Transmitting power control circuit |
JPH0198304A (ja) * | 1987-10-09 | 1989-04-17 | Furuno Electric Co Ltd | 電力増幅回路装置 |
Family Cites Families (4)
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AT387995B (de) * | 1987-06-12 | 1989-04-10 | Andritz Ag Maschf | Austragvorrichtung |
GB2247793A (en) * | 1990-09-06 | 1992-03-11 | Motorola Inc | Control of pulse power amplifier rise and fall |
CA2088813C (en) * | 1992-03-02 | 2004-02-03 | Willem G. Durtler | Automatic level control circuit for dual mode analog/digital cellular telephone |
JPH06132873A (ja) * | 1992-10-21 | 1994-05-13 | Nec Corp | 電力制御装置 |
-
1993
- 1993-01-25 JP JP5009922A patent/JP2937673B2/ja not_active Expired - Lifetime
-
1994
- 1994-01-21 DE DE69433321T patent/DE69433321D1/de not_active Expired - Lifetime
- 1994-01-21 KR KR1019950703001A patent/KR0165006B1/ko not_active IP Right Cessation
- 1994-01-21 US US08/464,828 patent/US5737697A/en not_active Expired - Lifetime
- 1994-01-21 TW TW083100507A patent/TW237583B/zh active
- 1994-01-21 CA CA002154082A patent/CA2154082A1/en not_active Abandoned
- 1994-01-21 WO PCT/JP1994/000078 patent/WO1994017598A1/ja active IP Right Grant
- 1994-01-21 EP EP94904747A patent/EP0681375B1/en not_active Expired - Lifetime
-
1995
- 1995-07-24 FI FI953542A patent/FI953542A/fi unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS60126925A (ja) * | 1983-12-13 | 1985-07-06 | Nec Corp | 自動送信電力制御回路 |
JPS62278823A (ja) * | 1986-05-28 | 1987-12-03 | Hitachi Shonan Denshi Kk | 電力制御回路 |
JPS647719A (en) * | 1987-06-29 | 1989-01-11 | Nec Corp | Transmitting power control circuit |
JPH0198304A (ja) * | 1987-10-09 | 1989-04-17 | Furuno Electric Co Ltd | 電力増幅回路装置 |
Non-Patent Citations (1)
Title |
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Also Published As
Publication number | Publication date |
---|---|
US5737697A (en) | 1998-04-07 |
EP0681375A1 (en) | 1995-11-08 |
TW237583B (ja) | 1995-01-01 |
FI953542A0 (fi) | 1995-07-24 |
KR960700575A (ko) | 1996-01-20 |
FI953542A (fi) | 1995-09-01 |
KR0165006B1 (ko) | 1999-02-01 |
EP0681375A4 (en) | 1997-10-22 |
JPH06224785A (ja) | 1994-08-12 |
DE69433321D1 (de) | 2003-12-18 |
JP2937673B2 (ja) | 1999-08-23 |
EP0681375B1 (en) | 2003-11-12 |
CA2154082A1 (en) | 1994-08-04 |
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