CN108649903A - A kind of circuit inhibiting octave power amplifier second harmonic - Google Patents
A kind of circuit inhibiting octave power amplifier second harmonic Download PDFInfo
- Publication number
- CN108649903A CN108649903A CN201810774931.5A CN201810774931A CN108649903A CN 108649903 A CN108649903 A CN 108649903A CN 201810774931 A CN201810774931 A CN 201810774931A CN 108649903 A CN108649903 A CN 108649903A
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- amplifier
- capacitance
- frequency measurement
- pins
- phase shifter
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- 230000002401 inhibitory effect Effects 0.000 title claims abstract description 9
- 238000005259 measurement Methods 0.000 claims abstract description 39
- 230000005611 electricity Effects 0.000 claims description 4
- 239000013078 crystal Substances 0.000 claims description 3
- 230000010363 phase shift Effects 0.000 abstract description 6
- 238000002347 injection Methods 0.000 abstract description 4
- 239000007924 injection Substances 0.000 abstract description 4
- 230000005764 inhibitory process Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03C—MODULATION
- H03C3/00—Angle modulation
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
Abstract
The present invention relates to a kind of circuits inhibiting octave power amplifier second harmonic, including first order amplifier, power splitter, digital phase shifter, second level amplifier and Frequency Measurement System, the input terminal of first order amplifier is signal input part, the output end of second level amplifier is signal output end, the output end of first order amplifier is connected with the input terminal of power splitter, the output terminals A of power splitter is directly connected with digital phase shifter, the output end B of power splitter is connected by Frequency Measurement System with digital phase shifter, and digital phase shifter is connected with the input terminal of second level amplifier.The phase shift of certain forms is carried out to the output signal of prime power amplifier using digital phase shifter, keep its harmonic component opposite in phase with fundamental signal, the input signal of final stage power amplifier contains the harmonic injection signal opposite with fundamental phase at this time, the amplified harmonic component for offsetting power amplifier itself generation of the signal, to achieve the purpose that improve octave power amplifier harmonics restraint degree.
Description
Technical field
The present invention relates to octave power amplifier techniques fields, and in particular to a kind of inhibition octave power amplifier two
The circuit of subharmonic.
Background technology
For octave power amplifier, the second harmonic of lower frequency limit is just fallen in working band, can not be utilized
Short-circuit minor matters or the mode of filter realize harmonics restraint.For the power-like amplifier, both at home and abroad at present before main use
Feedback technology inhibits harmonic wave.But feed-forward technique circuit composition is complicated, needs additional auxiliary power amplifier, and pair of its harmonic wave
The degree that disappears depends on phase, the amplitude alignment accuracy of two paths of signals, and specific implementation is more difficult.
Invention content
Technical problem to be solved by the invention is to provide it is a kind of inhibit octave power amplifier second harmonic circuit,
It is more difficult to solve the problems, such as that harmonics restraint is realized.
The technical solution that the present invention solves above-mentioned technical problem is as follows：A kind of inhibition octave power amplifier second harmonic
Circuit, including first order amplifier, power splitter, digital phase shifter, second level amplifier and Frequency Measurement System, the first order put
The input terminal of big device is signal input part, and the output end of the second level amplifier is signal output end, the first order amplification
The output end of device is connected with the input terminal of power splitter, and the output terminals A of the power splitter is directly connected with digital phase shifter, the work(
The output end B of device is divided to be connected with digital phase shifter by Frequency Measurement System, the input of the digital phase shifter and second level amplifier
End is connected.
Based on the above technical solution, the present invention can also be improved as follows.
Further, the Frequency Measurement System includes frequency measurement chip, the model NC2106Q of the frequency measurement chip, the frequency measurement
36th pin of chip is connected with one end of one end of capacitance C6 and resistance R2 respectively, the other end and power splitter of the capacitance C6
Output end B be connected, the other end of the resistance R2 is connected with one end of one end of capacitance C4 and capacitance C5 respectively, the capacitance
The other end of C4 and the other end of capacitance C5 are connected to ground, and 38 pins of the frequency measurement chip are connected to ground, institute by capacitance C8
State 1 pin of frequency measurement chip and ground be connected to by capacitance C7,5 pins of the frequency measurement chip respectively with one end of capacitance C3 and electricity
The one end for hindering R1 is connected, and the other end of the capacitance C3 is connected with the crystal oscillator that frequency is 1000MHZ, the other end of the resistance R1
It is connected respectively with one end of one end of capacitance C1 and capacitance C2, the other end of the capacitance C1 and the other end of capacitance C2 are respectively
Connecting 3 pins and ground of frequency measurement chip, 2 pins of the frequency measurement chip are connected to ground by power supply, and the 17 of the frequency measurement chip
Pin, 18 pins, 19 pins, 21 pins, 22 pins, 23 pins, 24 pins and 25 pins are all connected with digital phase shifter.
Further, the model NC6525C-0515 of the power splitter.
Further, the model CG2H40010F of the first order amplifier, the model of second level amplifier
CG2H40045F。
Further, the model NC3229S-107PD of the digital phase shifter.
The beneficial effects of the invention are as follows：In the present invention, the output signal of prime power amplifier is carried out using digital phase shifter
The phase shift of certain forms makes its harmonic component with fundamental signal in phase on the contrary, the input signal of final stage power amplifier includes at this time
The harmonic injection signal opposite with fundamental phase, the amplified harmonic component for offsetting power amplifier itself generation of the signal, from
And achieve the purpose that improve octave power amplifier harmonics restraint degree.By the way that Frequency Measurement System is added, the present invention can be made in office
The second harmonic degree of suppression of power amplifier can be improved under the input signal for frequency of anticipating.
Description of the drawings
Fig. 1 is circuit diagram of the present invention.
Specific implementation mode
The principle and features of the present invention will be described below with reference to the accompanying drawings, and the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the present invention.
As shown in Figure 1, a kind of circuit inhibiting octave power amplifier second harmonic, including first order amplifier, work(
Point device, digital phase shifter, second level amplifier and Frequency Measurement System, the input terminal of first order amplifier are signal input part, second
The output end of grade amplifier is signal output end, and the output end of first order amplifier is connected with the input terminal of power splitter, power splitter
Output terminals A be directly connected with digital phase shifter, the output end B of power splitter is connected by Frequency Measurement System with digital phase shifter, number
Control phase shifter is connected with the input terminal of second level amplifier.
In embodiments of the present invention, Frequency Measurement System includes frequency measurement chip, the model NC2106Q of frequency measurement chip, frequency measurement core
36th pin of piece is connected with one end of one end of capacitance C6 and resistance R2 respectively, the other end of the capacitance C6 and power splitter
Output end B is connected, and the other end of resistance R2 is connected with one end of one end of capacitance C4 and capacitance C5 respectively, the other end of capacitance C4
It is connected to ground with the other end of capacitance C5,38 pins of frequency measurement chip are connected to ground by capacitance C8, and 1 pin of frequency measurement chip is logical
It crosses capacitance C7 and is connected to ground, 5 pins of frequency measurement chip are connected with one end of one end of capacitance C3 and resistance R1 respectively, capacitance C3's
The other end and frequency are that the crystal oscillator of 1000MHZ is connected, the other end of resistance R1 respectively with one end of capacitance C1 and capacitance C2 one
End is connected, and the other end of capacitance C1 and the other end of capacitance C2 respectively connect 3 pins and ground of frequency measurement chip, frequency measurement chip
2 pins are connected to ground, 17 pins of frequency measurement chip, 18 pins, 19 pins, 21 pins, 22 pins, 23 pins, 24 by power supply
Pin and 25 pins are all connected with digital phase shifter.
In embodiments of the present invention, the model NC6525C-0515 of power splitter.
In embodiments of the present invention, the model CG2H40010F of first order amplifier, the model of second level amplifier
CG2H40045F。
In embodiments of the present invention, the model NC3229S-107PD of digital phase shifter.
The present invention concrete operating principle be：
Since its electrical length is different at different frequencies for the phase shifting devices such as phase shifter, electric bridge, microstrip line, therefore to different frequencies
Rate signal will produce different phase shifts, it is assumed that phase shifting device generates the signal that frequency is f the phase shift of α, then is 2f's to frequency
Signal will produce the phase shift of 2 α.Certain phase shift is carried out to the output signal that prime drives using the characteristic, input can be made last
The fundamental wave and harmonic wave of grade power amplifier have certain phase difference, so enable injection harmonic signal and the harmonic wave that generates of power amplifier itself into
Row is offset, and the second harmonic of power amplifier is inhibited.
In order to allow the harmonic suppression circuit to be useful in the frequency range of ultra wide band, can reflect to input signal
Frequently, and by Frequency Measurement System control phase shifting device so that the Injection Signal of final stage power amplifier has corresponding phase at different frequencies
Potential difference, the then ability that the circuit has frequency adaptive, can carry out the signal of optional frequency the inhibition of second harmonic.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (5)
1. a kind of circuit inhibiting octave power amplifier second harmonic, which is characterized in that including first order amplifier, work(point
The input terminal of device, digital phase shifter, second level amplifier and Frequency Measurement System, the first order amplifier is signal input part, institute
The output end for stating second level amplifier is signal output end, the output end of the first order amplifier and the input terminal phase of power splitter
Even, the output terminals A of the power splitter is directly connected with digital phase shifter, the output end B of the power splitter by Frequency Measurement System and
Digital phase shifter is connected, and the digital phase shifter is connected with the input terminal of second level amplifier.
2. the circuit according to claim 1 for inhibiting octave power amplifier second harmonic, which is characterized in that the survey
Display system includes frequency measurement chip, the model NC2106Q of the frequency measurement chip, the 36th pin of the frequency measurement chip respectively with electricity
The one end for holding C6 is connected with one end of resistance R2, and the other end of the capacitance C6 is connected with the output end B of power splitter, the resistance
The other end of R2 is connected with one end of one end of capacitance C4 and capacitance C5 respectively, and the other end of the capacitance C4 and capacitance C5's is another
One end is connected to ground, and 38 pins of the frequency measurement chip are connected to ground by capacitance C8, and 1 pin of the frequency measurement chip passes through electricity
Hold C7 and be connected to ground, 5 pins of the frequency measurement chip are connected with one end of one end of capacitance C3 and resistance R1 respectively, the capacitance
The other end of C3 and frequency are that the crystal oscillator of 1000MHZ is connected, the other end of the resistance R1 respectively with one end of capacitance C1 and electricity
The one end for holding C2 is connected, the other end of the capacitance C1 and the other end of capacitance C2 respectively connect frequency measurement chip 3 pins and
Ground, 2 pins of the frequency measurement chip are connected to ground by power supply, 17 pins of the frequency measurement chip, 18 pins, 19 pins, 21
Pin, 22 pins, 23 pins, 24 pins and 25 pins are all connected with digital phase shifter.
3. the circuit according to claim 1 for inhibiting octave power amplifier second harmonic, which is characterized in that the work(
Divide the model NC6525C-0515 of device.
4. the circuit according to claim 1 for inhibiting octave power amplifier second harmonic, which is characterized in that described the
The model CG2H40010F of first stage amplifier, the model CG2H40045F of second level amplifier.
5. the circuit according to claim 1 for inhibiting octave power amplifier second harmonic, which is characterized in that the number
Control the model NC3229S-107PD of phase shifter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810774931.5A CN108649903A (en) | 2018-07-13 | 2018-07-13 | A kind of circuit inhibiting octave power amplifier second harmonic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810774931.5A CN108649903A (en) | 2018-07-13 | 2018-07-13 | A kind of circuit inhibiting octave power amplifier second harmonic |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108649903A true CN108649903A (en) | 2018-10-12 |
Family
ID=63751710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810774931.5A Pending CN108649903A (en) | 2018-07-13 | 2018-07-13 | A kind of circuit inhibiting octave power amplifier second harmonic |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3426291A (en) * | 1965-03-31 | 1969-02-04 | Hughes Aircraft Co | Arrangement utilizing phase conditioned harmonically related signals to improve traveling-wave amplifier efficiency |
| US3976953A (en) * | 1974-10-21 | 1976-08-24 | Aeronutronic Ford Corporation | High efficiency broad band traveling-wave amplifier harmonic conditioning |
| US5172072A (en) * | 1991-09-06 | 1992-12-15 | Itt Corporation | High efficiency harmonic injection power amplifier |
| US6198346B1 (en) * | 1998-11-18 | 2001-03-06 | At&T Corp. | Adaptive linear amplifier without output power loss |
| US20030016081A1 (en) * | 2001-06-11 | 2003-01-23 | Kaoru Ishida | Control method and circuit for feedforward distortion compensation amplifier |
| CN1860678A (en) * | 2003-10-20 | 2006-11-08 | 汤姆森许可贸易公司 | Predistortor for use in wireless transmitter |
| JP2010004453A (en) * | 2008-06-23 | 2010-01-07 | Panasonic Corp | High frequency power amplifier and high frequency power output device with high frequency power amplifier |
| CN208539854U (en) * | 2018-07-13 | 2019-02-22 | 成都四威功率电子科技有限公司 | A kind of circuit inhibiting octave power amplifier second harmonic |
-
2018
- 2018-07-13 CN CN201810774931.5A patent/CN108649903A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3426291A (en) * | 1965-03-31 | 1969-02-04 | Hughes Aircraft Co | Arrangement utilizing phase conditioned harmonically related signals to improve traveling-wave amplifier efficiency |
| US3976953A (en) * | 1974-10-21 | 1976-08-24 | Aeronutronic Ford Corporation | High efficiency broad band traveling-wave amplifier harmonic conditioning |
| US5172072A (en) * | 1991-09-06 | 1992-12-15 | Itt Corporation | High efficiency harmonic injection power amplifier |
| US6198346B1 (en) * | 1998-11-18 | 2001-03-06 | At&T Corp. | Adaptive linear amplifier without output power loss |
| US20030016081A1 (en) * | 2001-06-11 | 2003-01-23 | Kaoru Ishida | Control method and circuit for feedforward distortion compensation amplifier |
| CN1860678A (en) * | 2003-10-20 | 2006-11-08 | 汤姆森许可贸易公司 | Predistortor for use in wireless transmitter |
| JP2010004453A (en) * | 2008-06-23 | 2010-01-07 | Panasonic Corp | High frequency power amplifier and high frequency power output device with high frequency power amplifier |
| CN208539854U (en) * | 2018-07-13 | 2019-02-22 | 成都四威功率电子科技有限公司 | A kind of circuit inhibiting octave power amplifier second harmonic |
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