CN109687878A - Synthesis output circuit for radio frequency synthetic source - Google Patents
Synthesis output circuit for radio frequency synthetic source Download PDFInfo
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- CN109687878A CN109687878A CN201811592615.2A CN201811592615A CN109687878A CN 109687878 A CN109687878 A CN 109687878A CN 201811592615 A CN201811592615 A CN 201811592615A CN 109687878 A CN109687878 A CN 109687878A
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- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 11
- 238000003786 synthesis reaction Methods 0.000 title claims abstract description 11
- 230000003750 conditioning effect Effects 0.000 claims abstract description 7
- 230000005236 sound signal Effects 0.000 claims abstract description 6
- 230000003321 amplification Effects 0.000 claims description 6
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 8
- 238000001514 detection method Methods 0.000 description 6
- 230000005611 electricity Effects 0.000 description 5
- 238000007689 inspection Methods 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000005428 wave function Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/005—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
- H04B1/0053—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band
- H04B1/006—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band using switches for selecting the desired band
-
- 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
- H04B1/0483—Transmitters with multiple parallel paths
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B2001/0408—Circuits with power amplifiers
- H04B2001/0416—Circuits with power amplifiers having gain or transmission power control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B2001/0491—Circuits with frequency synthesizers, frequency converters or modulators
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transmitters (AREA)
- Amplifiers (AREA)
Abstract
For the synthesis output circuit of radio frequency synthetic source, including pre- level alc circuit, the first gain adjustment amplifying circuit, the second gain adjustment amplifying circuit, low-pass filter group, the first modulator, the second modulator, the first amplifier, second amplifier, the first power splitter, the second power splitter, carrier level ALC loop, the first RF switch, the second RF switch, third RF switch, the first analog switch, the second analog switch, single-pole double-throw switch (SPDT), generating circuit from reference voltage, audio signal conditioning circuit；By RF switch, analog switch and single-pole double-throw switch (SPDT), low frequency output board and two plate of high frequency output plate are combined into an access, realized in one piece of output board.
Description
Technical field
The present invention relates to a kind of instrument-landing-system, in particular to a kind of synthesis output circuit for radio frequency synthetic source.
Background technique
Instrument-landing-system (Instrument Landing System, ILS) is translated into instrument landing system, blind landing system again
System, is the aircraft precision approach and Landing Guidance System being most widely used, including localizer (LOC) system, glide-path localizer
(GS) system, marker beacon (MB) system three parts.Its effect is to realize course by two beam radio signals of ground launch
Road and glide path guide, and establish one and are directed toward aerial virtual glissade by runway, aircraft is determined by airborne receiving equipment
The relative position of itself and the path makes aircraft fly to runway along correct direction and steadily declines, final realization safety
Land.So, how to improve the accuracy of ground launch signal and stability is important research direction.The heart in the prior art,
In order to not influence circuit board performance, low frequency output board and two plate of high frequency output plate usually use two accesses, increase circuit board
Volume and circuit board weight.
Summary of the invention
It is an object of the invention to overcome the above-mentioned deficiency in the presence of the prior art, provides and a kind of synthesized for radio frequency
The synthesis output circuit in source.
In order to achieve the above-mentioned object of the invention, the present invention provides following technical schemes:
A kind of synthesis output circuit for radio frequency synthetic source, including pre- level alc circuit, the amplification of the first gain adjustment
Circuit, the second gain adjustment amplifying circuit, low-pass filter group, the first modulator, the second modulator, the first amplifier, second
Amplifier, the first power splitter, the second power splitter, carrier level ALC loop, the first RF switch, the second RF switch, third
RF switch, the first analog switch, the second analog switch, single-pole double-throw switch (SPDT), generating circuit from reference voltage, audio signal tune
Manage circuit；
Radio-frequency input signals is after pre- level alc circuit stablizes carrier power, and into the first RF switch, switch is cut
It changes and is divided into high-frequency signal and low frequency signal, high-frequency signal enters the first gain adjustment amplifying circuit and improved and amplified, low frequency
Signal enters the second gain adjustment amplifying circuit and is improved and amplified, and right latter two signal is entered by the second RF switch
Low-pass filter group, filtered each road signal are divided into high-frequency signal and low frequency signal, high frequency letter by third RF switch again
Number successively by the first modulator is modulated, the first amplifier amplifies, the first power splitter carries out power distribution, low frequency
Signal successively pass through the second modulator is modulated, the second amplifier amplifies, the second power splitter carry out power distribution, so
Latter two signal is exported by single-pole double-throw switch (SPDT) in the same output port；Wherein, the second output of the first power splitter
End separates a part of power output with the second output terminal of the second power splitter respectively and connects carrier wave electricity by the second analog switch
Flat ALC loop, and according to generating circuit from reference voltage generate carrier level reference voltage and audio signal conditioning circuit it is defeated
Out, carrier level ALC loop generates feedback control signal, and feedback control signal enters the first analog switch and is divided into the anti-of high frequency
The feedback control signal of feedforward control signal and low frequency, difference the first modulator of feedback control and the second modulator.
The pre- level alc circuit includes attenuator, amplifier and detecting circuit；Radio frequency input is adjusted by attenuator
Afterwards, amplify into amplifier, be then output to first RF switch, while being output to the decaying of detecting circuit feedback control
Device.
The carrier level ALC loop includes comparator, integrator, ALC driving circuit, the second detecting circuit.External sound
Frequency amplitude-modulated signal passes through the Audio processing circuit, is added on ALC loop by the ALC driving circuit, controls the inspection
The detecting circuit variation that wave device generates, changes the electric current of electrically controlled attenuator in modulator, to control level of RF signals variation
The ALC driving circuit includes that the slope of curve adjusts circuit and curve offset adjusting circuit；The slope of curve adjusts electricity
Road includes multiple triodes, and the signal of the integrator output is adjusted according to DAC converter a output；Curve offset tune
Economize on electricity road includes multiple triodes, and the signal of the integrator output is adjusted according to DAC converter a output.
Compared with prior art, beneficial effects of the present invention: by RF switch, analog switch and single-pole double-throw switch (SPDT),
Low frequency output board (200M~3.5GHz) and two plate of high frequency output plate (3.5~6GHz) are combined into an access, exported at one piece
It is realized in plate, under the premise of not influencing circuit board performance, the volume for reducing circuit board mitigates the weight of circuit board.
Detailed description of the invention:
Fig. 1 is structural block diagram of the invention.
Fig. 2 is the circuit connection diagram for including pre- level alc circuit.
Fig. 3 be include the first RF switch, the first gain adjustment amplifying circuit, the second gain adjustment amplifying circuit and
The circuit connection diagram of two RF switches.
Fig. 4 is the circuit connection diagram for including modulator.
Fig. 5 includes the circuit connection diagram of the second analog switch.
Fig. 6 is the circuit connection diagram for including single-pole double-throw switch (SPDT).
Fig. 7 is the circuit connection diagram for including Audio processing circuit.
Fig. 8 is the circuit connection diagram for including the second detecting circuit, comparator and integrator.
Specific embodiment
Below with reference to test example and specific embodiment, the present invention is described in further detail.But this should not be managed
For the scope of the above subject matter of the present invention is limited to the following embodiments, all technologies realized based on the content of present invention are belonged to solution
In the scope of the present invention.
A kind of synthesis output circuit for radio frequency synthetic source, including pre- level alc circuit, the amplification of the first gain adjustment
Circuit, the second gain adjustment amplifying circuit, low-pass filter group, the first modulator, the second modulator, the first amplifier, second
Amplifier, the first power splitter, the second power splitter, carrier level ALC loop, the first RF switch, the second RF switch, third
RF switch, the first analog switch, the second analog switch, single-pole double-throw switch (SPDT)；
The radio-frequency input signals of 0.2~6GHz stablizes carrier power, such as Fig. 2, pre- level ALC by pre- level alc circuit
Circuit is a simple automatic gain control loop, pre- level ALC control unit by PIN attenuator HSMP-3832 (V4,
V5, V6, V9), broad band amplifier HMC311ST89 (N5, N6) and the first detecting circuit composition, major function is by carrier wave function
Rate is stablized in numerical value appropriate；Wherein, detecting circuit uses electric resistance partial pressure, single tube peak-detector circuit, utilizes precision resistance
A part of RF radio-frequency power of function point is output to wave detector to R215, R216, R217, R219 composition resistance power-devided circuit in proportion
HSMS-2865 (V56, V57), it is relatively small that this function divides mode to influence RF output power signal, pre- level carrier power
Voltage is set to be controlled by the output of the port E of 12-bits DAC converter AD7568 (D11).Because of RF radiofrequency signal bandwidth
Wider (200~6000MHz), wave detector will also meet this requirement, wave detector selection selection surface mount Schottky microwave inspection
Wave diode component HSMS-2865 (V56, V57).Using Schottky diode and external capacitive C146 come to RF input voltage
Peak plant quarantine wave is carried out, detecting circuit output is for rear end compared with carrier level reference voltage.Detection tube direct current biasing is about
0.1mA；The setting voltage of pre- level carrier power by 12-bits DAC converter AD7568 (D11) E output pin PRE
LEVEL REF DAC control.
Then 0.2~6GHz signal enter the first RF switch, such as Fig. 3, switching be divided into 3.5~6GHz signal and
0.2~3.5GHz signal, 3.5~6GHz signal pass through 2 PIN pipe HSMP-3812 (V79, V80) current regulations in series
First gain adjustment amplifying circuit of electrically controlled attenuator and amplifier is improved and is amplified, and 0.2~3.5GHz signal passes through 2
The electrically controlled attenuator of a PIN pipe HSMP-3812 (V1, V2) current regulation in series and the second gain adjustment of amplifier are put
Big circuit is improved and is amplified；First gain adjustment amplifying circuit and the second gain adjustment amplifying circuit use open-loop gain
Control, for compensating the frequency response of access and the frequency response of low-pass filter group, including electrically controlled attenuator and amplifier, the gain
Adjusting circuit (2) includes electrically controlled attenuator and amplifier.Electrically controlled attenuator uses 12-bits DAC converter AD7568
(D11) open-loop gain controls, and gain adjustment voltage GAIN ADJUST DAC is by 12-bits DAC converter AD7568 (D11)
C output pin GAIN_ADJUST_DAC control, gain adjustment unit ensures the radio-frequency power into ALC loop on the left side 10dBm
It is right.
Right latter two signal enters low-pass filter group by the second RF switch, and filtered each road signal is by penetrating
Frequency switch (3) N28 is divided into 3.5~6GHz signal and 0.2~3.5GHz signal, such as Fig. 4 again, and 3.5~6GHz signal successively passes through
First modulator is modulated, the first amplifier amplifies, the first power splitter carries out power distribution, the letter of 0.2~3.5GHz
Number successively by the second modulator is modulated, the second amplifier amplifies, the second power splitter carries out power distribution, first
Modulator include 5 PIN diode HSMP-3832 (V99, V100, V101, V102, V103) current regulations in series can
Become attenuator, the second modulator includes 5 PIN diode HSMP-3832 (V30, V31, V32, V33, V34) electricity in series
The variable attenuator adjusted is flowed, the first modulator and the second modulator can provide the linear regulation range of 40dB.
Right latter two signal is exported by single-pole double-throw switch (SPDT) K2A in the same output port, such as Fig. 6.
Wherein, the second output terminal of the first power splitter and the second output terminal of the second power splitter separate a part of function respectively
Rate output is believed by the second analog switch N31 connection carrier level ALC loop, and according to carrier level reference voltage and audio
The output of number conditioning circuit, carrier level ALC loop generate feedback control signal, and feedback control signal enters the first simulation and opens
N30 points are closed as the feedback control signal of 3.5~6GHz signal and the feedback control signal of 0.2~3.5GHz signal, is fed back respectively
Control the first modulator and the second modulator, such as Fig. 3.
The low-pass filter group is used to filter out the harmonic components of signal, is made of 9 low-pass filters, low-pass filtering
Device group is divided into (200MHz~310MHz), (310MHz~510MHz), (510MHz~850MHz), (850MHz~
1300MHz), (1300MHz~2000MHz), (2000MHz~3000MHz), (3000MHz~3700MHz), (3700MHz~
4500MHz), (4500MHz~6000MHz) 9 groups of low-pass filters.1300MHz low-pass filter below is using discrete first device
The low-pass filter of the LC low-pass filter of part composition, 1300MHz or more uses microstrip line low-pass filter.
Such as Fig. 7, the Audio processing circuit include comprising a logarithmic amplifying circuit, a piecewise linearity amplifying circuit,
Logarithmic amplifying circuit is mainly made of amplifier OP27GS (N24) and nonlinear device LM3046M (N19) etc., piecewise linearity amplification
Circuit is mainly made of amplifier OP27GS (N26).
Such as Fig. 8, the ALC carrier level ALC loop includes comparator, integrator, ALC driving circuit, the second detection electricity
Road.External audio amplitude-modulated signal passes through the Audio processing circuit, is added on ALC loop by the ALC driving circuit,
The detecting circuit variation that the wave detector generates is controlled, the electric current of electrically controlled attenuator in modulator is changed, to control radio frequency letter
Number level change ultimately forms amplitude-modulated signal output.ALC fixed amplitude circuit can provide the linear gain adjustable range of 40dB, use
Amplitude modulation function is compensated and generated in complete machine radio frequency amplitude.
For another example shown in Fig. 1,4,7,8, after input signal is modulated into the modulator, through the RF amplifying circuit
Then amplification generates RF output signal by first output end of power splitter；The second output terminal of the power splitter is by one
Divide radio-frequency power to be output to the wave detector, then generate signal " DET LOG " after the wave detector, the reference voltage produces
The Signal averaging that the carrier level reference voltage and the Audio processing circuit that raw circuit generates generate forms signal " AM+
REF ", the signal " DET LOG " that signal " AM+REF " is generated with the detecting circuit is compared into the comparator, poor
Value is converted to electric current and drives the integrator, and the output of the integrator passes through described in the ALC driving circuit feedback control
The electric current of electrically controlled attenuator in modulator forms feedback loop, exports RF output signal with firm power；Wherein, defeated
The size of power is determined by the numerical value of the carrier level reference voltage out.ALC driving circuit is modulator linearity circuit,
Two DC voltages of " ALC_MOD_DRIVER_BIAS/GAIN_DAC " and " ALC_MOD _ OFFSET_DAC " therein change respectively
Become slope and the offset of controlling curve, two signals are the control parameters of amplitude modulation calibration, the former influences amplitude modulation distortion；The latter is not
Amplitude modulation distortion is only influenced, also changes the radio frequency amplitude difference when open loop of ALC circuit and closed loop, the two voltages are respectively by 12-
The G output pin and H output pin of bits DAC converter AD7568 (D11) controls.Second detecting circuit is that a logarithm is put
Big circuit is mainly made of amplifier OPA627AU (N38) and nonlinear device MMPQ3906 (N40) etc., " DET_LOG_
The operating point of detection logarithmic amplification is arranged in OFFSET_DAC ", is influenced by detection tube parameter, and detecting circuit is constant just without adjusting
It is whole；" BULK_R_DAC " is the fine gains control signal of logarithmic amplifying circuit, a variable resistance is equivalent to, in complete machine tune
For reducing amplitude modulation distortion in width calibration.Detecting circuit forms a detection logarithmic signal " DET_LOG ".It is obtained by conditioning
Audio signal " AM " is superimposed to form " REF_PLUS_AM " with " ALC_REF_DAC " carrier level reference voltage, with detection logarithm
Signal " DET_LOG " compares, and difference is converted to electric current and drives the integrator being made of amplifier OP42GS (N41), integrator
Output changes the electric current of electrically controlled attenuator by ALC driving circuit, flows through series connection PIN diode HSMP-3832 by control
The electric current of (V30, V31, V32, V33, V34) and HSMP-3832 (V99, V100, V101, V102, V103) changes its radio frequency
Impedance controls the size of its decaying, to control the level of final radio frequency output signal.12-bits D/A converter
AD7568 (D11) provides above-mentioned accurate adjustable dc voltage " ALC_MOD_DRIVER_BIAS/GAIN_DAC ", " ALC_
MOD_OFFSET_DAC”、“DET_LOG_OFFSET_DAC”、 “BULK_R_DAC”、“ALC_REF_DAC”。
The above, the only detailed description of the specific embodiment of the invention, rather than limitation of the present invention.Related skill
The technical staff in art field the various replacements made, modification and changes in the case where not departing from principle and range of the invention
Into should all be included in the protection scope of the present invention.
Claims (4)
1. a kind of synthesis output circuit for radio frequency synthetic source, which is characterized in that including pre- level alc circuit, the first gain
Adjust amplifying circuit, the second gain adjustment amplifying circuit, low-pass filter group, the first modulator, the second modulator, the first amplification
Device, the second amplifier, the first power splitter, the second power splitter, carrier level ALC loop, the first RF switch, the second radio frequency are opened
It closes, third RF switch, the first analog switch, the second analog switch, single-pole double-throw switch (SPDT), generating circuit from reference voltage, audio
Signal conditioning circuit；
Radio-frequency input signals is after the processing of pre- level alc circuit, and into the first RF switch, switching is divided into high-frequency signal
And low frequency signal, high-frequency signal enter the first gain adjustment amplifying circuit, low frequency signal enters the second gain adjustment amplifying circuit,
Right latter two signal enters low-pass filter group by the second RF switch, and filtered each road signal passes through third RF switch
It is divided into high-frequency signal and low frequency signal again, high-frequency signal sequentially enters the first modulator, the first amplifier, the first power splitter, low
Frequency signal sequentially enters the second modulator, the second amplifier, the second power splitter, and right latter two signal is existed by single-pole double-throw switch (SPDT)
The same output port is exported；Wherein, the second output terminal of the first power splitter and the second output terminal of the second power splitter are logical
The second analog switch connection carrier level ALC loop is crossed, carrier level ALC loop is defeated according to the generating circuit from reference voltage
The feedback control signal generated out with the output of the audio signal conditioning circuit enters the first analog switch and is divided into the anti-of high frequency
The feedback control signal of feedforward control signal and low frequency, difference the first modulator of feedback control and the second modulator.
2. the synthesis output circuit according to claim 1 for radio frequency synthetic source, which is characterized in that the pre- level
Alc circuit includes attenuator, amplifier and detecting circuit；Radio frequency inputs after attenuator is adjusted, and amplifies into amplifier, so
After be output to first RF switch, while being output to detecting circuit feedback control attenuator.
3. the synthesis output circuit according to claim 1 for radio frequency synthetic source, which is characterized in that the carrier level
ALC loop includes comparator, integrator, ALC driving circuit, the second detecting circuit.External audio amplitude-modulated signal passes through the sound
Frequency conditioning circuit is added on ALC loop by the ALC driving circuit, is controlled the detecting circuit that the wave detector generates and is become
Change, change the electric current of electrically controlled attenuator in modulator, to control level of RF signals variation.
4. the synthesis output circuit according to claim 1 for radio frequency synthetic source, which is characterized in that the ALC driving
Circuit includes that the slope of curve adjusts circuit and curve offset adjusting circuit；It includes multiple triodes, root that the slope of curve, which adjusts circuit,
The signal of the integrator output is adjusted according to an output of DAC converter；It includes multiple triodes that curve offset, which adjusts circuit,
The signal of the integrator output is adjusted according to DAC converter a output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811592615.2A CN109687878B (en) | 2018-12-25 | 2018-12-25 | Synthetic output circuit for radio frequency synthetic source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811592615.2A CN109687878B (en) | 2018-12-25 | 2018-12-25 | Synthetic output circuit for radio frequency synthetic source |
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| Publication Number | Publication Date |
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| CN109687878A true CN109687878A (en) | 2019-04-26 |
| CN109687878B CN109687878B (en) | 2024-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811592615.2A Active CN109687878B (en) | 2018-12-25 | 2018-12-25 | Synthetic output circuit for radio frequency synthetic source |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110001563A1 (en) * | 2008-02-22 | 2011-01-06 | Antonio Carugati | PIN-DIODE Linearized Automatic Gain Control Circuits |
| CN103546172A (en) * | 2013-11-06 | 2014-01-29 | 南京国睿安泰信科技股份有限公司 | Radio-frequency signal generator |
| CN104393857A (en) * | 2014-10-10 | 2015-03-04 | 中国电子科技集团公司第四十一研究所 | Large-dynamic-range automatic level control (ALC) system for microwave signal generator |
| CN104734656A (en) * | 2013-12-24 | 2015-06-24 | 苏州普源精电科技有限公司 | Radio frequency signal source with amplitude modulation and automatic level control functions |
| CN106603168A (en) * | 2016-11-14 | 2017-04-26 | 南京熊猫电子股份有限公司 | Transmitter ALC design universal test platform and test method |
| CN209170347U (en) * | 2018-12-25 | 2019-07-26 | 成都前锋电子仪器有限责任公司 | Synthesis output circuit for radio frequency synthetic source |
-
2018
- 2018-12-25 CN CN201811592615.2A patent/CN109687878B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110001563A1 (en) * | 2008-02-22 | 2011-01-06 | Antonio Carugati | PIN-DIODE Linearized Automatic Gain Control Circuits |
| CN103546172A (en) * | 2013-11-06 | 2014-01-29 | 南京国睿安泰信科技股份有限公司 | Radio-frequency signal generator |
| CN104734656A (en) * | 2013-12-24 | 2015-06-24 | 苏州普源精电科技有限公司 | Radio frequency signal source with amplitude modulation and automatic level control functions |
| CN104393857A (en) * | 2014-10-10 | 2015-03-04 | 中国电子科技集团公司第四十一研究所 | Large-dynamic-range automatic level control (ALC) system for microwave signal generator |
| CN106603168A (en) * | 2016-11-14 | 2017-04-26 | 南京熊猫电子股份有限公司 | Transmitter ALC design universal test platform and test method |
| CN209170347U (en) * | 2018-12-25 | 2019-07-26 | 成都前锋电子仪器有限责任公司 | Synthesis output circuit for radio frequency synthetic source |
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| CN109687878B (en) | 2024-03-19 |
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