CN1183663C - High frequency amplifier - Google Patents
High frequency amplifier Download PDFInfo
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- CN1183663C CN1183663C CNB018100945A CN01810094A CN1183663C CN 1183663 C CN1183663 C CN 1183663C CN B018100945 A CNB018100945 A CN B018100945A CN 01810094 A CN01810094 A CN 01810094A CN 1183663 C CN1183663 C CN 1183663C
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- 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
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/189—High-frequency amplifiers, e.g. radio frequency amplifiers
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Abstract
A high frequency amplifier comprising an amplifier (1) for amplifying an input signal, an input signal discriminating circuit (6) for issuing instructions to detect the peak and average powers of the input signal to calculate the peak-average power ratio, to make a comparison between the calculated peak-average power ratio and a predetermined reference value, and to control a gate voltage to be fed to the amplifier (1) on the basis of the result of the comparison, and a gate voltage control circuit (7) for controlling a gate voltage or a drain electrode voltage to be fed to the amplifier (1) on the basis of instructions from the input signal discriminating circuit (6) in such a manner that even if the peak-average power ratio of the input signal varies, the distortion power fed from the amplifier (1) does not vary.
Description
Technical field
The present invention relates to the high-frequency amplifier of amplifying high frequency signal.
Background technology
Fig. 1 is expression document Stephen A.Maas, " Nonlinear MicrowaveCircuits: non-linear microwave circuit ", Artech House, the block diagram of the structure of disclosed existing high-frequency amplifier in 1988, among the figure, the 1st, the amplifier of amplification high-frequency input signal, the 2nd, pair amplifier 1 is supplied with the power circuit of grid voltage Vg, drain voltage Vd, the 3rd, input terminal, the 4th, lead-out terminal.
Below, its action is described.
Fig. 2 is the input power figure over time of expression input signal.The input signal of input on input terminal 3, as shown in Figure 2, with respect to Mean Input Power Pave, the input signal M of input peak value input power Ppeak1 in certain time zone T1, the input signal N of input peak value input power Ppeak2 in the T2 of another time zone.As the ratio Ppeak/Pave that establishes peak value input power Ppeak and this Mean Input Power Pave be peak-to-average power than Pr, then peak-to-average power will change with input signal M, N than Pr.
Fig. 3 is the average output power characteristic corresponding with Mean Input Power of the existing high-frequency amplifier of expression and the figure of distortion power characteristic.Among the figure, the 101st, the average power characteristic, the 201st, the distortion power characteristic during with input signal M input amplifier 1, the 202nd, the distortion power characteristic during with input signal N input amplifier 1 is being supplied with grid voltage Vg, drain voltage Vd respectively from power circuit 2 pair amplifiers 1.
As shown in Figure 3, the distortion power during from amplifier 1 output average output power P1 is D1 with input signal M input amplifier 1 time, is D2 with input signal N input amplifier 1 time.That is, when input signal when input signal M changes into input signal N, peak-to-average power increases than Pr, thereby distortion power is increased to D2 from D1.
Because existing high-frequency amplifier has aforesaid structure, when amplifier 1 output average output power Pave such as input signal changes and peak-to-average power is changed than Pr, then distortion power will change, thus exist when peak-to-average power during than the big input signal N input amplifier 1 of Pr distortion power with the problem that increases.
The present invention develops for solving aforesaid problem, provides a kind of peak-to-average power to change the high-frequency amplifier that also can suppress the variation of distortion power than Pr even its objective is.
Disclosure of an invention
High-frequency amplifier of the present invention has: amplifier, amplify input signal; The input signal distinguishing circuit, calculate the peak-to-average power ratio by the peak power and the average power that detect input signal, and the peak-to-average power that calculates compared than with specified reference value, thereby indication is controlled grid voltage or the drain voltage of supplying with above-mentioned amplifier according to comparative result; Voltage control circuit, indication according to above-mentioned input signal distinguishing circuit, the grid voltage or the drain voltage of above-mentioned amplifier supplied with in control, even so that the peak-to-average power of input signal does not change than changing the distortion power that yet can make from above-mentioned amplifier output.
According to this configuration, though the peak-to-average power with input signal than changing the effect that also can suppress from the variation of the distortion power of amplifier output.
In high-frequency amplifier of the present invention, the input signal distinguishing circuit has: average power detection circuit, the average power of detection input signal; The peak power detection circuit, the peak power of detection input signal; The power ratio counting circuit, the peak power of the input signal that goes out according to the average power of the input signal that is gone out by above-mentioned average power detection electric circuit inspection and by above-mentioned peak power detection electric circuit inspection is calculated the peak-to-average power ratio; Comparison circuit will be compared than with specified reference value by the peak-to-average power that above-mentioned power ratio counting circuit calculates, and according to comparative result instructed voltage control circuit grid voltage or the drain voltage of supplying with above-mentioned amplifier controlled.
According to this configuration, though the peak-to-average power with input signal than changing the effect that also can suppress from the variation of the distortion power of amplifier output.
In high-frequency amplifier of the present invention, voltage control circuit, when the peak-to-average power ratio that is calculated by the input signal distinguishing circuit is higher than specified reference value, compare when being lower than specified reference value with the peak-to-average power ratio, increase the grid voltage of supplying with above-mentioned amplifier.
In this manner, though the peak-to-average power with input signal than changing the effect that also can suppress from the variation of the distortion power of amplifier output.
In high-frequency amplifier of the present invention, voltage control circuit, when the peak-to-average power ratio that is calculated by the input signal distinguishing circuit is higher than specified reference value, compare when being lower than specified reference value with the peak-to-average power ratio, increase the drain voltage of supplying with above-mentioned amplifier.
In this manner, though the peak-to-average power with input signal than changing the effect that also can suppress from the variation of the distortion power of amplifier output.
High-frequency amplifier of the present invention has: amplifier, amplify input signal; The input signal distinguishing circuit, calculate the peak-to-average power ratio by the peak power and the average power that detect input signal, and the peak-to-average power that calculates compared than with specified reference value, thereby indication is controlled grid voltage or the drain voltage of supplying with above-mentioned amplifier according to comparative result; Voltage control circuit, indication according to above-mentioned input signal distinguishing circuit, the grid voltage and the drain voltage of above-mentioned amplifier supplied with in control, even so that the peak-to-average power of input signal does not change than changing the distortion power that yet can make from above-mentioned amplifier output.
According to this configuration, though the peak-to-average power with input signal than changing the effect that also can suppress from the variation of the distortion power of amplifier output.
In high-frequency amplifier of the present invention, the input signal distinguishing circuit has: average power detection circuit, the average power of detection input signal; The peak power detection circuit, the peak power of detection input signal; The power ratio counting circuit, the peak power of the input signal that goes out according to the average power of the input signal that is gone out by above-mentioned average power detection electric circuit inspection and by above-mentioned peak power detection electric circuit inspection is calculated the peak-to-average power ratio; Comparison circuit will be compared than with specified reference value by the peak-to-average power that above-mentioned power ratio counting circuit calculates, and according to comparative result instructed voltage control circuit grid voltage and the drain voltage of supplying with above-mentioned amplifier controlled.
According to this configuration, though the peak-to-average power with input signal than changing the effect that also can suppress from the variation of the distortion power of amplifier output.
In high-frequency amplifier of the present invention, voltage control circuit, when the peak-to-average power ratio that is calculated by the input signal distinguishing circuit is higher than specified reference value, compare when being lower than specified reference value with the peak-to-average power ratio, increase the grid voltage of supplying with above-mentioned amplifier, increase the drain voltage of supplying with above-mentioned amplifier simultaneously
In this manner, though the peak-to-average power with input signal than changing the effect that also can suppress from the variation of the distortion power of amplifier output.
In high-frequency amplifier of the present invention, voltage control circuit, when the peak-to-average power ratio that is calculated by the input signal distinguishing circuit is higher than specified reference value, compare when being lower than specified reference value with the peak-to-average power ratio, increase the grid voltage of supplying with above-mentioned amplifier, reduce to supply with the drain voltage of above-mentioned amplifier simultaneously.
In this manner, though the peak-to-average power with input signal than changing the effect that also can suppress from the variation of the distortion power of amplifier output.
In high-frequency amplifier of the present invention, voltage control circuit, when the peak-to-average power ratio that is calculated by the input signal distinguishing circuit is higher than specified reference value, compare when being lower than specified reference value with the peak-to-average power ratio, reduce to supply with the grid voltage of above-mentioned amplifier, increase the drain voltage of supplying with above-mentioned amplifier simultaneously.
In this manner, though the peak-to-average power with input signal than changing the effect that also can suppress from the variation of the distortion power of amplifier output.
High-frequency amplifier of the present invention has: amplifier, amplify input signal; Voltage control circuit, input is to the kind of the input signal of above-mentioned amplifier input or from the outside indication informations such as size of the average output power of above-mentioned amplifier output, and grid voltage or drain voltage or the grid voltage and the drain voltage of the above-mentioned amplifier of control supply, even do not change so that the content changing of the outside indication information of being imported also can make from the distortion power of above-mentioned amplifier output.
According to this configuration, though the peak-to-average power with input signal than changing the effect that also can suppress from the variation of the distortion power of amplifier output.
The simple declaration of accompanying drawing
Fig. 1 is the block diagram of the structure of the existing high-frequency amplifier of expression.
Fig. 2 is the input power figure over time of the input signal of the existing high-frequency amplifier of expression.
Fig. 3 is the average output power characteristic corresponding with Mean Input Power of the existing high-frequency amplifier of expression and the figure of distortion power characteristic.
Fig. 4 is the block diagram of structure of the high-frequency amplifier of expression the invention process form 1.
Fig. 5 is the average output power characteristic corresponding with Mean Input Power of high-frequency amplifier of expression the invention process form 1 and the figure of distortion power characteristic.
Fig. 6 is the block diagram of structure of the high-frequency amplifier of expression the invention process form 2.
Fig. 7 is the average output power characteristic corresponding with Mean Input Power of high-frequency amplifier of expression the invention process form 2 and the figure of distortion power characteristic.
Fig. 8 is the block diagram of structure of the high-frequency amplifier of expression the invention process form 3.
Fig. 9 is the average output power characteristic corresponding with Mean Input Power of high-frequency amplifier of expression the invention process form 3 and the figure of distortion power characteristic.
Figure 10 is the figure of the another kind of average output power characteristic corresponding with Mean Input Power of the high-frequency amplifier of expression the invention process form 3.
Figure 11 is the block diagram of structure of the high-frequency amplifier of expression the invention process form 4.
Figure 12 is the block diagram of structure of the high-frequency amplifier of expression the invention process form 4.
Figure 13 is the block diagram of structure of the high-frequency amplifier of expression the invention process form 4.
The optimal morphology that is used to carry out an invention
Below, in order to illustrate in greater detail the present invention, explanation is used to implement optimal morphology of the present invention with reference to the accompanying drawings.
Example 1
Fig. 4 is the block diagram of structure of the high-frequency amplifier of expression the invention process form 1.Among the figure, the 5th, take out the directional coupler of the part of input signal, the 6th, thereby calculating peak-to-average power, peak power Ppeak by detecting the input signal that takes out from directional coupler 5 and average power P ave compare according to the comparative result indication the grid voltage Vg of supply amplifier 1 or the input signal distinguishing circuit that drain voltage Vd controls than Pr and specified reference value Ps than Pr and with the peak-to-average power that calculates, the 7th, according to the indication of input signal distinguishing circuit 6, the grid voltage control circuit (voltage control circuit) of the grid voltage Vg of amplifier 1 is supplied with in control from power circuit 2.
In addition, in the input signal distinguishing circuit 6 of Fig. 4, the 11st, detection is from the average power detection circuit of the average power Pave of the input signal of directional coupler 5 taking-ups, the 12nd, detection is from the peak power detection circuit of the peak power Ppeak of the input signal of directional coupler 5 taking-ups, the 13rd, according to by the average power Pave of average power detection circuit 11 detected input signals and by the peak power Ppeak of peak power detection circuit 12 detected input signals calculate peak-to-average power than Pr (=Ppeak/Pave) power ratio counting circuit, the 14th, with the peak-to-average power that calculates by power ratio counting circuit 13 than Pr and the comparison circuit that specified reference value Ps compares and indicate the grid voltage Vg of 7 pairs of supply amplifiers 1 of grid voltage control circuit to control according to comparative result.
In Fig. 4, other structures are identical with the structure of Fig. 1 of the prior art.
Below, its action is described.
From input terminal 3 input input signal M, N as shown in Figure 2, and be input to amplifier 1 by directional coupler 5, the signal after the amplification is from lead-out terminal 4 outputs.From the direct pair amplifiers 1 of power circuit 2 supply with drain voltage Vd (=Vd1).In addition, also supply with two kinds of grid voltage Vg (=Vg1 or Vg2) by grid voltage control circuit 7 pair amplifiers 1 from power circuit 2, amplifier 1, be set at the B level action that when supplying with grid voltage Vg1, is used to improve power-efficient processing and amplifying, when supplying with grid voltage Vg2, be used to improve the processing and amplifying of the A level action of distortion.
From the input signal that directional coupler 5 is taken into, be input to input signal distinguishing circuit 6.In input signal distinguishing circuit 6,, detect the peak power Ppeak of input signals by peak power detection circuit 12 by the average power Pave of average power detection circuit 11 detection input signals.Power ratio counting circuit 13, according to by the average power Pave of average power detection circuit 11 detected input signals and by the peak power Ppeak of peak power detection circuit 12 detected input signals calculate peak-to-average power than Pr (=Ppeak/Pave).
Grid voltage control circuit 7 according to the indication from comparison circuit 14, is supplied with amplifier 1 with grid voltage Vg1 or Vg2.Amplifier 1 when supplying with grid voltage Vg1, is used to improve the processing and amplifying of the B level action of power-efficient, is used to improve the processing and amplifying of the A level action of distortion when supplying with grid voltage Vg2.
Fig. 5 is the average output power characteristic corresponding with Mean Input Power of high-frequency amplifier of expression the invention process form 1 and the figure of distortion power characteristic.Among the figure, the 101st, the average power characteristic when having imported input signal M and having supplied with grid voltage Vg1, the 201st, the distortion power characteristic during with input signal M input amplifier 1 and supply grid voltage Vg1, the 202nd, the distortion power characteristic during with input signal N input amplifier 1 and supply grid voltage Vg1, average power characteristic 101, distortion power characteristic 201,202 are identical with the characteristic of Fig. 3 of prior art.
In addition, in Fig. 5, the 102nd, the average power characteristic when having imported input signal N and having supplied with grid voltage Vg2, the 203rd, with input signal N input amplifier 1 and the distortion power characteristic when supplying with grid voltage Vg2, supply with drain voltage Vd1 to amplifier 1 from power circuit 2.
As shown in Figure 5, when having imported input signal M, peak-to-average power and supplied with grid voltage Vg1 less than specified reference value Ps and pair amplifier 1 than Pr, the average power characteristic is 101, the distortion power characteristic is 201, thereby the distortion power during average output power P1 is D1.
On the other hand, when having imported input signal N, peak-to-average power and supplied with grid voltage Vg2 greater than specified reference value Ps and pair amplifier 1 than Pr, the average power characteristic is 102, the distortion power characteristic is 203, thereby the distortion power during average output power P1, identical when having imported input signal M, still be D1.That is the distortion power D2 during, from grid voltage Vg1 is improved as distortion power D1.
In grid voltage control circuit 7, preestablish when the time for input signal M the grid voltage Vg1 that obtains average power characteristic 101 and distortion power characteristic 201, and when for input signal N the grid voltage Vg2 of acquisition average power characteristic 102 and distortion power characteristic 203, grid voltage control circuit 7, according to the indication of comparison circuit 14, select grid voltage Vg1 or the Vg2 that sets and supply with amplifier 1.
For obtaining the average power characteristic 102 different, only need to increase the grid voltage Vg1 when obtaining average power characteristic 101 and be set at grid voltage Vg2, increase thereby direction that the gain of amplifier 1 is increased changes and gets final product to the drain current that makes amplifier 1 with average power characteristic 101.For obtaining the distortion power characteristic 203 different with distortion power characteristic 202, only need to increase the grid voltage Vg1 when obtaining distortion power characteristic 202 and be set at grid voltage Vg2, to amplifier 1 is got final product from the direction change that the processing and amplifying of carrying out the action of B level becomes the processing and amplifying of carrying out the action of A level, by making amplifier 1 carry out the processing and amplifying of A level action, shown in distortion power characteristic 203, distortion power will be improved.
As mentioned above, according to this example 1,, also can obtain the effect of inhibition by the grid voltage Vg of control supply amplifier 1 from the variation of the distortion power of amplifier output even the peak-to-average power of input signal changes than Pr.
Example 2
Fig. 6 is the block diagram of structure of the high-frequency amplifier of expression the invention process form 2.Among the figure, the 8th, control the drain voltage control circuit (voltage control circuit) of supplying with the drain voltage Vd of amplifiers 1 from power circuit 2 according to the indication of input signal distinguishing circuit 6.The structure of Fig. 4 in other structures and the example 1 is identical.In addition, the structure of input signal distinguishing circuit 6 is also identical with the structure of Fig. 4 in the example 1.Input signal distinguishing circuit 6 compares peak-to-average power than Pr and specified reference value Ps, and controls the drain voltage Vd that supplies with amplifiers 1 according to comparative result indication drain voltage control circuit 8.
Below, its action is described.
From input terminal 3 input input signal M, N as shown in Figure 2, and be input to amplifier 1 by directional coupler 5, the signal after the amplification is from lead-out terminal 4 outputs.From the direct pair amplifiers 1 of power circuit 2 supply with grid voltage Vg (=Vg1).In addition, also supply with two kinds of drain voltage Vd (=Vd1 or Vd2) from power circuit 2 by drain voltage control circuit 8 pair amplifiers 1, amplifier 1 is compared when being set at when supplying with drain voltage Vd2 with drain voltage Vd1 and is made the saturation power increase.
Input signal from directional coupler 5 takes out is input to input signal distinguishing circuit 6, and carries out the processing identical with example 1.That is,, detect the peak power Ppeak of input signals by peak power detection circuit 12, and calculate peak-to-average powers by power ratio counting circuit 13 and compare Pr by the average power Pave of average power detection circuit 11 detection input signals.
Drain voltage control circuit 8 according to the indication from comparison circuit 14, is supplied with amplifier 1 with drain voltage Vd1 or Vd2.Amplifier 1 when supplying with drain voltage Vd2, is compared during with supply drain voltage Vd1, and saturation power is increased.
Fig. 7 is the average output power characteristic corresponding with Mean Input Power of high-frequency amplifier of expression the invention process form 2 and the figure of distortion power characteristic, among the figure, the 101st, the average power characteristic when having imported input signal M and having supplied with drain voltage Vd1, the 201st, the distortion power characteristic during with input signal M input amplifier 1 and supply drain voltage Vd1, the 202nd, the distortion power characteristic during with input signal N input amplifier 1 and supply drain voltage Vd1, average power characteristic 101, distortion power characteristic 201,202 are identical with the characteristic of Fig. 5 of example 1.
In addition, in Fig. 7, the 103rd, the average power characteristic when having imported input signal N and having supplied with grid voltage Vd2, the 204th, with input signal N input amplifier 1 and the distortion power characteristic when supplying with grid voltage and being Vd2, supply with drain voltage Vg1 to amplifier 1 from power circuit 2.
As shown in Figure 7, when having imported input signal M, peak-to-average power and supplied with grid voltage Vd1 less than specified reference value Ps and pair amplifier 1 than Pr, the average power characteristic is 101, the distortion power characteristic is 201, thereby the distortion power during average output power P1 is D1.
On the other hand, when having imported input signal N, peak-to-average power and supplied with grid voltage Vd2 greater than specified reference value Ps and pair amplifier 1 than Pr, the average power characteristic is 103, the distortion power characteristic is 204, thereby the distortion power during average output power P1, identical when having imported input signal M, still be D1.That is the distortion power D2 during, from drain voltage Vd1 is improved as distortion power D1.
In drain voltage control circuit 8, preestablish when the time for input signal M the drain voltage Vd1 that obtains average power characteristic 101 and distortion power characteristic 201, and when for input signal N the drain voltage Vd2 of acquisition average power characteristic 103 and distortion power characteristic 204, drain voltage control circuit 8, according to the indication of comparison circuit 14, select to set drain voltage Vd1 or Vd2 and supply with amplifier 1.
For obtaining the average power characteristic 103 different with average power characteristic 101, only need to increase the drain voltage Vd1 when obtaining average power characteristic 101 and be set at drain voltage Vd2, the direction that increases to the saturation power that makes amplifier 1 changes and gets final product.For obtaining the distortion power characteristic 204 different with distortion power characteristic 202, only need to increase the drain voltage Vd1 when obtaining distortion power characteristic 202 and be set at drain voltage Vd2, the direction change that increases to the saturation power that makes amplifier 1 gets final product, when the saturation power of amplifier 1 increases, the output of the amplifier 1 compensation ratio of power output (saturation power with) increases, thereby shown in distortion power characteristic 204 distortion power is improved.
As mentioned above, according to this example 2,, also can obtain the effect of inhibition by the drain voltage Vd of control supply amplifier 1 from the variation of the distortion power of amplifier output even the peak-to-average power of input signal changes than Pr.
Example 3
Fig. 8 is the block diagram of structure of the high-frequency amplifier of expression the invention process form 3, this example 3, be the combination of example 1 and example 2, so have grid voltage control circuit 7 (voltage control circuit) and drain voltage control circuit 8 (voltage control circuit).That is, input signal distinguishing circuit 6 compares peak-to-average power than Pr and specified reference value Ps, and controls grid voltage Vg and the drain voltage Vd that supplies with amplifiers 1 according to comparative result indication grid voltage control circuit 7 and drain voltage control circuit 8.
Below, its action is described.
From input terminal 3 input input signal M, N as shown in Figure 2, and be input to amplifier 1 by directional coupler 5, the signal after the amplification is from lead-out terminal 4 outputs.Supply with two kinds of grid voltage Vg (Vg1 or Vg2) from power circuit 2 by grid voltage control circuit 7 pair amplifiers 1, supply with two kinds of drain voltage Vd (=Vd1 or Vd2) by drain voltage control circuit 8 pair amplifiers 1 simultaneously.
Input signal from directional coupler 5 takes out is input to input signal distinguishing circuit 6, and carries out the processing identical with example 1.That is,, detect the peak power Ppeak of input signals by peak power detection circuit 12, and calculate peak-to-average powers by power ratio counting circuit 13 and compare Pr by the average power Pave of average power detection circuit 11 detection input signals.
Grid voltage control circuit 7 according to the indication from comparison circuit 14, is supplied with amplifier 1 with grid voltage Vg1 or Vg2.Amplifier 1 when supplying with grid voltage Vg1, is used to improve the processing and amplifying of the B level action of power-efficient, is used to improve the processing and amplifying of the A level action of distortion when supplying with grid voltage Vg2.In addition, drain voltage control circuit 8 according to the indication from comparison circuit 14, is supplied with amplifier 1 with drain voltage Vd1 or Vd2.Amplifier 1 when supplying with drain voltage Vd2, is compared during with supply drain voltage Vd1, and saturation power is increased.
Fig. 9 is the average output power characteristic corresponding with Mean Input Power of high-frequency amplifier of expression the invention process form 3 and the figure of distortion power characteristic.Among the figure, the 101st, the average power characteristic when having imported input signal M and having supplied with grid voltage Vg1, drain voltage Vd1, the 201st, the distortion power characteristic during with input signal M input amplifier 1 and supply grid voltage Vg1, drain voltage Vd1, the 202nd, the distortion power characteristic during with input signal N input amplifier 1 and supply grid voltage Vg1, drain voltage Vd1, average power characteristic 101, distortion power characteristic 201,202 are identical with the characteristic of Fig. 5 of example 1.
In addition, in Fig. 9, the 104th, the average power characteristic when having imported input signal N and having supplied with grid voltage Vg2, drain voltage Vd2, the 205th, with input signal N input amplifier 1 and the distortion power characteristic when supplying with grid voltage Vg2, drain voltage Vd2.
As shown in Figure 9, when having imported input signal M, peak-to-average power and supplied with grid voltage Vg1, drain voltage Vd1 less than specified reference value Ps and pair amplifier 1 than Pr, the average power characteristic is 101, the distortion power characteristic is 201, thereby the distortion power during average output power P1 is D1.
On the other hand, when having imported input signal N, peak-to-average power and supplied with grid voltage Vg2, drain voltage Vd2 greater than specified reference value Ps and pair amplifier 1 than Pr, the average power characteristic is 104, the distortion power characteristic is 205, thereby the distortion power during average output power P1, identical when having imported input signal M, still be D1.That is the distortion power D2 during, from grid voltage Vg1, drain voltage Vd1 is improved as distortion power D1.
In grid voltage control circuit 7, drain voltage control circuit 8, preestablish when the time grid voltage Vg1, the drain voltage Vd1 that obtain average power characteristic 101 and distortion power characteristic 201, preestablish the grid voltage Vg2 of acquisition average power characteristic 104 and distortion power characteristic 205 when for input signal N, drain voltage Vd2 simultaneously for input signal M.Grid voltage control circuit 7, drain voltage control circuit 8 according to the indication of comparison circuit 14, are selected to set grid voltage Vg1 or Vg2, drain voltage Vd1 or Vd2 and supply with amplifier 1.
For obtaining the average power characteristic 104 different with average power characteristic 101, only need to increase the grid voltage Vg1 when obtaining average power characteristic 101 and be set at grid voltage Vg2, to the drain current that makes amplifier 1 increase thereby make direction change that the gain of amplifier 1 increases, simultaneously increase the drain voltage Vd1 when obtaining average power characteristic 101 and be set at drain voltage Vd2, the direction that increases to the saturation power that makes amplifier 1 changes and gets final product.
In addition, for obtaining the distortion power characteristic 205 different with distortion power characteristic 202, only need to increase the grid voltage Vg1 when obtaining distortion power characteristic 202 and be set at grid voltage Vg2, to make amplifier 1 from the processing and amplifying of carrying out the action of B level become the direction change of the processing and amplifying of carrying out the action of A level, simultaneously increase the drain voltage Vd1 when obtaining distortion power characteristic 202 and be set at drain voltage Vd2, the direction that increases to the saturation power that makes amplifier 1 changes and gets final product.
As mentioned above, by making grid voltage Vg1 increase to grid voltage Vg2 and making drain voltage Vd1 increase to drain voltage Vd2, can make amplifier 1 carry out the processing and amplifying of A level action, the output compensation of amplifier 1 is increased, thereby shown in distortion power characteristic 205, distortion power is improved.
Figure 10 is the figure of the another kind of average output power characteristic corresponding with Mean Input Power of the high-frequency amplifier of expression the invention process form 3, among the figure, average power characteristic 101,104 is identical with Fig. 9.The 105th, the grid voltage Vg1 when having imported input signal N and increase having obtained average power characteristic 101 and be set at grid voltage Vg2, to the drain current that makes amplifier 1 increase thereby make direction change that the gain of amplifier 1 increases, when reducing to obtain average power characteristic 101 simultaneously drain voltage Vd1 and be set at drain voltage Vd2, the average output power characteristic of the direction change that reduces to the saturation power that makes amplifier 1.Here, when having imported input signal N, also the equal-sized distortion power of distortion power D1 that only grid voltage Vg2, drain voltage Vd2 need be set in the time of can having obtained and import input signal M gets final product.
In addition, in Figure 10, the 106th, imported input signal N and the grid voltage Vg1 when reducing to obtain average power characteristic 101 and be set at grid voltage Vg2, to the drain current that makes amplifier 1 reduce thereby make direction change that the gain of amplifier 1 reduces, simultaneously increase the drain voltage Vd1 when obtaining average power characteristic 101 and be set at drain voltage Vd2, the average output power characteristic of the direction change that increases to the saturation power that makes amplifier 1.Here, when having imported input signal N, also the equal-sized distortion power of distortion power D1 that only grid voltage Vg2, drain voltage Vd2 need be set in the time of can having obtained and import input signal M gets final product.
When setting grid voltage Vg2, drain voltage Vd2, shown in the average power characteristic 104,105,106 of Figure 10, can set 3 kinds of values, in these 3 kinds of values, also can select to make the power-efficient of amplifier 1 to be best value.
As mentioned above, according to this example 3,, also can obtain the effect of inhibition by the grid voltage Vg and the drain voltage Vd of control supply amplifier 1 from the variation of the distortion power of amplifier output even the peak-to-average power of input signal changes than Pr.
Example 4
Figure 11, Figure 12, Figure 13 is the block diagram of structure of the high-frequency amplifier of expression the invention process form 4, among the figure, the 9th, control terminal, be used to import on input terminal 3 input input signal kind or from the outside indication informations such as size of the average output power of the amplifier 1 of lead-out terminal 4 outputs, grid voltage control circuit 7 (voltage control circuit), drain voltage control circuit 8 (voltage control circuit), control gate pole tension Vg and drain voltage Vd are even so that the content changing of the outside indication information of input also can make the distortion power of exporting from amplifier 1 not change on control terminal 9.Other structures are identical with Fig. 4, Fig. 6 of above-mentioned example, the structure of prosign among Fig. 8.
Below, its action is described.
In figure Figure 11, Figure 12, Figure 13, on control terminal 9 from outside input in the kind of the input signal of input terminal 3 inputs and from the outside indication informations such as size of the average output power of the amplifier 1 of lead-out terminal 4 outputs.Kind as input signal, be that the input signal of indication in above-mentioned each example is the information of input signal M or input signal N, as the size of average output power, be that the indication average output power is normal average output power or the average output power that is higher than normal output.
When the kind time-like of on control terminal 9, having imported input signal, grid voltage control circuit 7, drain voltage control circuit 8, the input signal of importing from input terminal 3 according to the indication of input on control terminal 9 is input signal M or the outside indication information of input signal N, with mode control gate pole tension Vg and the drain voltage Vd same, so that the distortion power D1 of the distortion power when having imported input signal N when having equaled to import input signal M with above-mentioned each example.
When on control terminal 9, having imported average output power big or small, grid voltage control circuit 7, drain voltage control circuit 8, indication average output power according to input on control terminal 9 is the normal average output power or the outside indication information of the average output power that is higher than normal output, control gate pole tension Vg and drain voltage Vd are so that the distortion power D1 of the distortion power when being higher than the average output power of normal output when equaling normal average output power.
As mentioned above, according to this example 4, even the content changing of outside indication information of input on control terminal 9 also can suppress from the variation of the distortion power of amplifier 1 output by control gate pole tension Vg or drain voltage Vd or grid voltage Vg and drain voltage Vd.
In above-mentioned each example, according to 2 kinds of input signals or 2 kinds of average output powers, by 2 grades of control gate pole tension Vg or drain voltage Vd, but input signal or average output power also can be for more than 3 kinds, and by control gate pole tension Vg or drain voltage Vd more than 3 grades.
In addition, in above-mentioned each example, the amplifier of amplifier 1 as source ground is illustrated, but also can be the amplifier of grounded-grid or grounded drain.Further, in above-mentioned each example, amplifier 1 is illustrated as field-effect transistor, but also can be general transistor.
Applicability on the industry
As mentioned above, high-frequency amplifier of the present invention changes even be applicable to papr Become the high-frequency amplifier of the variation of the distortion power that also can suppress to export.
Claims (10)
1. a high-frequency amplifier is characterized in that, has:
Amplify input signal the enlarging section;
The input signal distinguishing circuit, calculate the peak-to-average power ratio by the peak power and the average power that detect input signal, and the peak-to-average power that calculates compared than with specified reference value, thereby indication is controlled grid voltage or the drain voltage of supplying with above-mentioned enlarging section according to comparative result; And
Voltage control circuit, indication according to above-mentioned input signal distinguishing circuit, the grid voltage of above-mentioned enlarging section and at least one side in the drain voltage are supplied with in control, even so that the peak-to-average power of input signal does not change than changing the distortion power that also can make from the output of above-mentioned enlarging section, and
This voltage control circuit is connected with above-mentioned input signal distinguishing circuit and above-mentioned enlarging section.
2. high-frequency amplifier according to claim 1 is characterized in that,
The input signal distinguishing circuit has:
The average power detection circuit, the average power of detection input signal;
The peak power detection circuit, the peak power of detection input signal;
The power ratio counting circuit, the peak power of the input signal that goes out according to the average power of the input signal that is gone out by above-mentioned average power detection electric circuit inspection and by above-mentioned peak power detection electric circuit inspection is calculated the peak-to-average power ratio;
Comparison circuit will be compared than with specified reference value by the peak-to-average power that above-mentioned power ratio counting circuit calculates, and according to comparative result instructed voltage control circuit grid voltage or the drain voltage of supplying with above-mentioned enlarging section controlled.
3. high-frequency amplifier according to claim 1 is characterized in that:
Voltage control circuit has:
When the peak-to-average power ratio that is calculated by the input signal distinguishing circuit is higher than specified reference value, compare when being lower than specified reference value with the peak-to-average power ratio, increase the element of the grid voltage of supplying with above-mentioned enlarging section.
4. high-frequency amplifier according to claim 1 is characterized in that:
Voltage control circuit has:
When the peak-to-average power ratio that is calculated by the input signal distinguishing circuit is higher than specified reference value, compare when being lower than specified reference value with the peak-to-average power ratio, increase the element of the drain voltage of supplying with above-mentioned enlarging section.
5. a high-frequency amplifier is characterized in that, has:
Amplify input signal the enlarging section;
The input signal distinguishing circuit, calculate the peak-to-average power ratio by the peak power and the average power that detect input signal, and the peak-to-average power that calculates compared than with specified reference value, thereby indication is controlled grid voltage and the drain voltage of supplying with above-mentioned enlarging section according to comparative result; And
Voltage control circuit, indication according to above-mentioned input signal distinguishing circuit, the grid voltage of above-mentioned enlarging section and at least one side in the drain voltage are supplied with in control, even so that the peak-to-average power of input signal does not change than changing the distortion power that also can make from the output of above-mentioned enlarging section, and
This voltage control circuit is connected with above-mentioned input signal distinguishing circuit and above-mentioned enlarging section.
6. high-frequency amplifier according to claim 5 is characterized in that:
The input signal distinguishing circuit has:
The average power detection circuit, the average power of detection input signal;
The peak power detection circuit, the peak power of detection input signal;
The power ratio counting circuit, the peak power of the input signal that goes out according to the average power of the input signal that is gone out by above-mentioned average power detection electric circuit inspection and by above-mentioned peak power detection electric circuit inspection is calculated the peak-to-average power ratio;
Comparison circuit will be compared than with specified reference value by the peak-to-average power that above-mentioned power ratio counting circuit calculates, and according to comparative result instructed voltage control circuit grid voltage and the drain voltage of supplying with above-mentioned enlarging section controlled.
7. high-frequency amplifier according to claim 5 is characterized in that:
Voltage control circuit has:
When the peak-to-average power ratio that is calculated by the input signal distinguishing circuit is higher than specified reference value, compare when being lower than specified reference value with the peak-to-average power ratio, increase the grid voltage of supplying with above-mentioned enlarging section, increase the element of the drain voltage of supplying with above-mentioned enlarging section simultaneously.
8. high-frequency amplifier according to claim 5 is characterized in that:
Voltage control circuit has:
When the peak-to-average power ratio that is calculated by the input signal distinguishing circuit is higher than specified reference value, compare when being lower than specified reference value with the peak-to-average power ratio, increase to supply with the grid voltage of above-mentioned enlarging section, reduce to supply with the element of the drain voltage of above-mentioned enlarging section simultaneously.
9. high-frequency amplifier according to claim 5 is characterized in that:
Voltage control circuit has:
When the peak-to-average power ratio that is calculated by the input signal distinguishing circuit is higher than specified reference value, compare when being lower than specified reference value with the peak-to-average power ratio, reduce to supply with the grid voltage of above-mentioned enlarging section, increase the element of the drain voltage of supplying with above-mentioned enlarging section simultaneously.
10. a high-frequency amplifier is characterized in that, has:
Amplify input signal the enlarging section;
The input signal distinguishing circuit is made to the kind of the input signal of above-mentioned enlarging section input or from the outside indication informations such as size of the average output power of above-mentioned enlarging section output; And
Voltage control circuit, the grid voltage of above-mentioned enlarging section and at least one side in the drain voltage are supplied with in control, even do not change so that also can make from the distortion power of above-mentioned enlarging section output from the content changing of the outside indication information of above-mentioned input signal distinguishing circuit input.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP85889/2001 | 2001-03-23 | ||
| JP2001085889A JP3923270B2 (en) | 2001-03-23 | 2001-03-23 | High frequency amplifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1430809A CN1430809A (en) | 2003-07-16 |
| CN1183663C true CN1183663C (en) | 2005-01-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB018100945A Expired - Fee Related CN1183663C (en) | 2001-03-23 | 2001-05-22 | High frequency amplifier |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP3923270B2 (en) |
| KR (1) | KR100522068B1 (en) |
| CN (1) | CN1183663C (en) |
| WO (1) | WO2002078181A1 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI115935B (en) * | 2003-02-25 | 2005-08-15 | Nokia Corp | Method and apparatus for regulating amplifier characteristics |
| JP2006005839A (en) * | 2004-06-21 | 2006-01-05 | Samsung Electronics Co Ltd | Amplifier |
| JP4767630B2 (en) * | 2005-08-30 | 2011-09-07 | 京セラ株式会社 | Transmitting apparatus and transmitting method |
| FR2890260B1 (en) * | 2005-08-30 | 2007-10-12 | Thales Sa | METHOD AND DEVICE FOR CONTROLLING 2 LEVELS OF CRETE POWER FOR AN IMPULSE MODE AMPLIFIER |
| JPWO2008044276A1 (en) * | 2006-10-06 | 2010-02-04 | パナソニック株式会社 | Power amplifier |
| CN101404638B (en) * | 2008-11-10 | 2011-04-20 | 华为技术有限公司 | Method and apparatus improving efficiency of orthogonal frequency division multiplexing communicator |
| JP5184665B2 (en) * | 2011-02-22 | 2013-04-17 | 京セラ株式会社 | Transmitting apparatus and transmitting method |
| JP6747031B2 (en) * | 2016-04-15 | 2020-08-26 | 富士通株式会社 | amplifier |
| CN105932970A (en) * | 2016-04-18 | 2016-09-07 | 北京邮电大学 | Envelope tracked Doherty power amplifier |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63149909A (en) * | 1986-12-13 | 1988-06-22 | Nec Corp | Low noise amplifier circuit |
| JP2000004173A (en) * | 1998-06-17 | 2000-01-07 | Denso Corp | Method and device for detecting distortion in digital transmitter |
| US6427067B1 (en) * | 1999-06-10 | 2002-07-30 | The Whitaker Corporation | Detector driven bias circuit for power transistors |
-
2001
- 2001-03-23 JP JP2001085889A patent/JP3923270B2/en not_active Expired - Fee Related
- 2001-05-22 CN CNB018100945A patent/CN1183663C/en not_active Expired - Fee Related
- 2001-05-22 WO PCT/JP2001/004287 patent/WO2002078181A1/en active IP Right Grant
- 2001-05-22 KR KR10-2002-7015788A patent/KR100522068B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR20030014237A (en) | 2003-02-15 |
| KR100522068B1 (en) | 2005-10-18 |
| JP2002290163A (en) | 2002-10-04 |
| JP3923270B2 (en) | 2007-05-30 |
| WO2002078181A1 (en) | 2002-10-03 |
| CN1430809A (en) | 2003-07-16 |
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