CN1043593A - Double ring automatic power level control circuit for transmitter - Google Patents
Double ring automatic power level control circuit for transmitter Download PDFInfo
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- CN1043593A CN1043593A CN 89105437 CN89105437A CN1043593A CN 1043593 A CN1043593 A CN 1043593A CN 89105437 CN89105437 CN 89105437 CN 89105437 A CN89105437 A CN 89105437A CN 1043593 A CN1043593 A CN 1043593A
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Abstract
The invention discloses the high standing wave of a kind of compatibility and protect the double ring automatic power level control circuit of energy automatically, it belongs to the automated radio frequency output power level control circuit in broadcasting, communication, radar and the similar transmitter thereof.It is mainly by the bidirectional power coupler, the one or two transmission channel and anti-phase amplification, and first and second loop switching alarm, filtering, gain can automatically controlledly be penetrated and be put and the high standing wave in n road such as protects to form automatically at circuit.The present invention has exempted high power amplifier part the most expensive in the common transmitter with the work of single loop automatic electric-level control mode with extremely low cost and has caused the possibility that blasting is impaired even burn because of the automatic electric-level control loop is out of control.
Description
The invention discloses the double ring automatic power level control circuit of the high standing wave automatic protection functions of a kind of compatibility.It belongs to the automated radio frequency output power level control circuit in broadcasting, TV, communication, radar and the similar transmitter thereof.
The principle of existing automatic electric-level control technology is seen accompanying drawing 1 in the transmitter at present.For being called " monocycle automatic level control circuit ", its radio-frequency input signals V with for the purpose of the present invention's difference
InBe input to can be automatically controlled variable gain radio frequency amplifier (being usually operated on the radio frequency low level) or variable radio frequency attenuator A1 that can be automatically controlled, its output de-energisation transmitter high power amplifier A
3,
Radio frequency high-power signal after the amplification arrives antenna TX emission through forward power coupler GO1.
Usually the gain of the radio-frequency power of A3 is all very big, and the level of its output radio-frequency power is also very high.But its fluctuation is bigger, and relevant with several factors: the variation of input stimulus level; Wide-band transmitter is worked on the different carrier frequency points in wave band; Similar but different radio-frequency power devices; The varying environment temperature; " hot " when " cold conditions " when starting shooting soon and steady operation etc.
For stablizing the radio frequency power output level of transmitter, the rf power signal of forward transmitted is partly coupling in GO1, through diode BG1 detection again through similar by inductance L 1, capacitor C 1, the filter filtering that elements such as C2 are formed, dc control signal after the decoupling arrives the inverting input of direct current amplifier A2 through transmission line (cable or wire etc.) L1, and the reference voltage that is provided with another input of A2 relatively, direct-current control voltage after the anti-phase amplification of A2 is oppositely controlled the rf gain (or rf attenuation amount) of A1, automatically adjust and enter the RF excited level of A3, thereby make the forward radio frequency power level automatic steady of A3 output.
Because A3 power gain height, power output is big, the working temperature height, so it is very easily because of blasting damage or burn power device (high power semi-conductor power device make height put all the more so), therefore the defective of existing automatic electric-level control technology shown in Figure 1 is as transmission line L1 rosin joint to take place, bad connection, BG1 lost efficacy, inductance L 1 is opened a way and is formed off state, or L1, C1, C2, when meeting accident short circuit, the automatic electric-level control direct voltage delivering path fault automatic electric-level control loop of GO1 output lost efficacy, A2 is output as high level, A1 is in highest-gain (or minimum attenuation) state, the RF excited that arrives A3 is excessive, A3 is in the blasting state, causes the particularly A3 of semiconductor device making of high power amplifier A3(the most expensive in the transmitter) may damage or burn.
The double ring automatic power level control circuit that the purpose of this invention is to provide a kind of novelty, and it can be compatible mutually with high standing wave automatic protection functions.This circuit has been exempted high power amplifier part the most expensive in the common transmitter with the work of monocycle automatic electric-level control mode with extremely low cost and has been caused the possibility that blasting is impaired even burn because of the automatic electric-level control loop is out of control; Work as the first automatic electric-level control loop fault (circuit of making by the present invention goes out alarm signal immediately) among the present invention simultaneously, the second automatic electric-level control loop is with the automatic connection operate as normal, so may greatly reducing of the transmitter interrupt that operate as normal emission improved the functional reliability of transmitter.
The double ring automatic power level control circuit of the high standing wave automatic protection functions of this compatibility is mainly by two forward power couplers; transmit the transmission channel of first loop control voltage; transmit the transmission channel of second loop control voltage; the first loop direct-current control voltage see-saw circuit; the second loop direct-current control voltage see-saw circuit; the one the second control loop switching alarm circuit; level and smooth decoupling filter circuit; rf gain can be automatically controlled radio frequency amplifying circuit; high standing wave automatic protection circuit in n road and accessory circuit thereof are formed.
Below with reference to accompanying drawing the present invention is described in further detail.
Fig. 1 is existing in the present transmitter (monocycle) automatic electric-level control technology schematic diagram.
Fig. 2 is a machine double ring automatic power level control circuit of the present invention.
In the double ring automatic power level control circuit of accompanying drawing transmitter with compatible high standing wave automatic protection functions:
Two forward power coupler GO2 comprise: the first loop detector diode BG1, first loop low pass filter that is made of inductance L 1, capacitor C 1 and C2 interconnection; The second loop detector diode BG2, the second loop low pass filter that constitutes by inductance L 2, capacitor C 3 and C4 interconnection; And coupled transmission line etc.In GO2, the output port of the high power amplifier A3 of transmitter links the input port of GO2, and the antenna output end mouth of GO2 connects antenna TX, and most radio frequency power outputs of A3 are launched by antenna TX.The forward rf power signal that fraction is used for the first automatic electric-level control loop in GO2 is coupled to the anode of BG1, input first loop low pass filter leads to the input port of transmission channel L1 again after the BG1 detection, thereby the first loop direct-current control voltage of the pulsation of BG1 detection output forms the input port that the first level and smooth loop direct-current control voltage arrives transmission channel L1 through the first loop low pass filter filtering.The forward rf power signal that another fraction is used for the second automatic flat control loop in GO2 is coupled to the anode of BG2.Input second loop low pass filter leads to the input port of transmission channel L2 again after the BG2 detection, thereby the second loop direct-current control voltage of the pulsation of BG2 detection output arrives the input port of transmission channel L2.
The first loop direct-current control voltage see-saw circuit comprises: the potentiometer W1 that adjusts first loop direct-current control voltage size usefulness; Buffering amplifier A4; By resistance R 1～R4, capacitor C 5, and the anti-phase direct current amplifier that constitutes of amplifier A6 etc.L1 leads to W1, and the travelling arm of W1 links "+" input of A4.R1, R2, C5 form the dc partial voltage filter network, and the output after its dividing potential drop is admitted to "+" reference potential input of A6 as the reference voltage of A6.The end of R3 links the output port of A4, and the other end of R3 is connected to "-" input port of A6 with the port of R4, and the other end of R4 links the output port of A6.The voltage gain of the first loop direct-current control voltage see-saw circuit is mainly determined by the ratio of R4/R3.Thereby the first loop direct-current control voltage that comes of L1 transmission is sent to the input port of A4 after W1 adjusts its size, and through the A4 buffering, A6 is anti-phase to amplify the output port that the back arrives A6.
The second loop direct-current control voltage see-saw circuit comprises: the potentiometer W2 that adjusts second loop direct-current control voltage size usefulness; Buffering amplifier A5; Anti-phase direct current amplifier that constitutes by resistance R 5～R8, capacitor C 6, amplifier A7 etc.L2 leads to W2, and the cursor slide end of W2 links "+" input port of A5.R5, R6, C6 form the dc partial voltage filter network, and the output after its dividing potential drop is admitted to "+" reference potential input of A7 as the reference voltage of A7.The end of R7 links the output port of A5, and the other end of R7 connects "-" input port of A7 with the port of R8, and the another port of R8 is connected to the output port of A7.The voltage gain of the second loop direct-current control voltage see-saw circuit is mainly determined by the ratio of R8/R7.Thereby the second loop direct-current control voltage that comes of L2 transmission is sent to the defeated port of A5 after W2 adjusts its size, and through the A5 buffering, A7 is anti-phase to amplify the output port that the back arrives A7.
First and second control loop control switching circuit comprises: the reverse voltage comparator that is made of resistance R 9～R12, electric capacity and amplifier A8 etc.; First can be automatically controlled on-off switch circuit SW1; The second reverse voltage comparator that constitutes by resistance R 13～R16, capacitor C 8 and amplifier A9 etc.; Second can be automatically controlled on-off switch circuit SW2 etc.R9, R10, C7 form the dc partial voltage filter network, and the output after its dividing potential drop is admitted to "+" reference potential input of A8 as the comparative voltage of A8.The end of R11 links the output port of A6, and another end of R11 links "-" input port of A8 with the port of R12, and the another port of R12 links the output port of A8.The voltage gain of the first reverse voltage comparator is mainly determined by the ratio of R12/R11.R13, R14, C8 form the dc partial voltage filter network, and the output after its dividing potential drop is admitted to "+" reference potential input of A9 as the comparison reference voltage of A9.The end of R15 links the output port of A8, and the other end of R15 links "-" input port of A9 with the port of R16, and the another port of R16 links the output port of A9.The voltage gain of the second reverse voltage comparator is mainly determined by the ratio of R16/R15.The automatically controlled port S1 of the delivery outlet of A8 and the break-make of SW1 links.A8 output high level when the A6 output potential is lower than the reference potential of A8 "+" input port, thereby SW1 connects.Because A6 output links to each other with input port with SW1, so the first loop direct-current control voltage that arrives the A6 output port is by SW1 and be transported to the ∑ point.The power on/off control port S2 of the output port of A9 and SW2 links.When A8 output high level, A8 output port current potential is higher than the reference potential of A9 "+" input port, the A9 output low level, thereby SW2 disconnects the second loop DC control of arrival A7 output
Pressure can't be crossed SW2 and arrive the ∑ point.Equally, when A6 output port current potential is higher than the reference potential of A8 "+" input port, the A8 output low level; This moment, the reference potential of A9 "+" input port was higher than the low level that A8 exports, so A9 output high level.Thereby SW1 disconnects because of its automatically controlled port S1 low level, and the voltage of A6 output port can't arrive the ∑ point by SW1.And this moment, SW2 was switched on because of its automatically controlled port S2 high level, and the second loop direct-current control voltage of A7 output port can be crossed SW2 smoothly and arrive the ∑ point.The switching alarm circuit is made up of resistance R 17, R18, transistor BG6 and LED (R) etc.Wherein R17 is the resistance of base stage current limliting, and R18 is collection limit leakage resistance, is serially connected with the LED(R of BG6 collector electrode) whether luminous (whether flowing through suitable BG6 collected current) just controlled by BG6 base stage incoming level.Because the end of R17 links output port and the SW2 port of A9 simultaneously, therefore SW1 conducting when A8 output port (being the S1 port of SW1) is high level, A9 output port (being the S2 port) is a low level, BG6 ends, and LED(R) extinguishes unglazed.Circuit SW1 conducting just often that Here it is, first loop control voltage of A6 output arrives the ∑ point by SW1, SW2 disconnects, LED(R when second loop control voltage can't arrive ∑ point) be non-luminous.And when A8 output port (being S1) is low level, SW1 disconnects, A6 output port voltage can't arrive the ∑ point by SW1, A9 output port (S2) is a high level simultaneously, the SW2 conducting, the second loop direct-current control voltage of A7 output arrives the ∑ point by SW2, and is fully encouraged saturation conduction because of BG6 simultaneously, flows through an amount of electric current in LED(R) to send ruddiness.
Level and smooth decoupling filter LPF is made up of inductance L 3, resistance R 19, R20 and capacitor C 9～C14.∑ point is the input port of LPF, and second grid of dual-gate mos field effect transistor BG3 (being control gate) G2 port is the output port of LPF.L3, R19, R20, C9～C14 form LC, the level and smooth decoupling filter of RC type more piece.First or the second loop automatic electric-level control signal voltage that arrives ∑ point is transferred to the G2 point after the level and smooth decoupling filtering of LPF.Because the voltage at electric capacity two ends can not suddenly change, so the C9 among the LPF～C14 electric capacity has the effect of memory message.Thereby first and second control loop to switch the transient process of moment be very mild.
Rf gain can comprise by automatically controlled radio frequency amplifying circuit: the radio-frequency input signals coupling matching network that is made of capacitor C 15, C16 and resistance R 25; By resistance R 21～R28, capacitor C 17, C18, the radio frequency amplifier that the rf gain that inductance L 4 and dual-gate mos field effect transistor BG3 constitute can be automatically controlled; By resistance R 29～R32, capacitor C 19, the radio frequency buffering device that radio frequency crystals triode BG4, BG5 constitute etc.In the radio-frequency input signals coupling network, C15, C16 are the stopping direct current coupling capacitance, and R25 is a build-out resistor.This matching network is with radio-frequency input signals voltage V
InBe coupled to the first grid (the signal input grid) G1 of BG3.In be made of the radio frequency amplifier that rf gain can be automatically controlled BG3 etc., the Dc bias of G1 grid is provided by the dc partial voltage network that R23, R24 form; The Dc bias of G2 grid is provided by the dc partial voltage network that R21, R22 form, and the resistance of R21, R22 (for example megaohm magnitude) should be much larger than R19, R20, so that first and second loop automatic electric-level control is respond well.R26, R27 are the DC stabilization resistance of source S, and C18 is for exchanging shunt capacitance, and low resistance R26 has also played an amount of radio frequency and exchanged negative feedback.The distributed capacitance over the ground of the drain D of L4 and BG3 forms the output-parallel resonant tank, and low resistance R28 plays damping action, thereby this circuit has broadband character.In the radio frequency buffering device, BG4, BG5 press the Darlington complex form and connect, and BG4 base resistance R29 rises and prevents that parasitism from shaking
Effect, this buffer output end mouth is attached to the input port of A3.Radio-frequency input signals voltage V
InEnter the signal grid G1 of BG3 through radio-frequency input signals coupling matching network, amplify by BG3, signal amplification factor is controlled by the first or second loop dc control signal voltage that is sent to the control gate G2 of BG3 by LPF, controlled, the radiofrequency signal after amplifying is coupled to the R29 of radio frequency buffering device BG4 through coupling capacitance C17, and the output radiofrequency signal voltage V0 of this buffer is the rf excitation signal of the A3 after controlled.
N road high standing wave automatic protection circuit BH and auxiliary circuit thereof comprise: by adjusting the potentiometer W3 that compares current potential and use, the automatic relatively device of anti-phase direct voltage of protecting of the high standing wave of the first via that resistance R 33～R35, amplifier A10 etc. constitute; By adjusting the second tunnel high standing wave that relatively potentiometer W4, resistance R 36～R38, amplifier A11 etc. the constitute anti-phase direct voltage of protection device relatively automatically; By adjusting the potentiometer W5 that compares current potential and use, the automatic relatively device of anti-phase direct voltage of protecting of the high standing wave in n road that resistance R 39～R41, amplifier A12 etc. constitute; And the auxiliary circuit that constitutes by the capacitor C 20～C22 that plays the decoupling filter action, radio frequency chokes Quan L5, germanium switching diode BG7～BG9 etc. of playing the on-off switch effect.Operate as normal detects each the road reflection direct-current control voltage V that obtains by each reflection power detection port that the transmitter high power amplifies in the delivering path
～V
Value is low value (because of detected port is low standing wave).Anti-phase amplification because of A10～A12, so their output is high level, the negative electrode level of BG7～BG9 is higher than anode level separately, so BG7～BG9 is in cut-off state during operate as normal, add the decoupling filter action of electric capacity such as radio frequency chokes volume L5 and C20～C22, BH and auxiliary circuit thereof almost do not have influence to double ring automatic power level control circuit.When certain road, for example the reflection direct-current control voltage V that this road respective detection obtains high standing wave appears, in the corresponding reflection power detection port of the first via (NO.1)
Vsw1Increase; A10 output low level when it surpasses the reference comparative level of the definite A10 of this road W3; be connected the BG7 conducting of A10 output port; the G2 electrode potential of BG3 is pulled on the low level of BH output by pincers; the output of BG3 radio frequency is by big high attenuation; thereby high power amplifier A3 is cut off output because of pumping signal lowers greatly, and corresponding high-power component is protected in the transmitter.The second tunnel (NO.2) ... (NO, the automatic protection philosophy of high standing wave n) is identical with the NO.1 road on the n road.So the high standing wave automatic protection functions in the present invention and n road is compatible well.
Design philosophy according to double ring automatic power level control circuit of the present invention, comprise one to power coupler and two automatic electric-level control loops, the more reliable more ring automatic level control circuits of the work that can be extended to during the work of dicyclo automatic electric-level control mode.Many ring automatic electric-level control modes comprise a corresponding multichannel forward power coupler and corresponding a plurality of level control loops when working.
Transmitter with the two forward power couplers in the double ring automatic power level control circuit of compatible standing wave automatic protection functions according to the different transformer coupled or microstrip transmission line couplings of frequency range; but coaxial transmission line coupling; or waveguide coupling; or optical cable transmission coupling, and simple capacitive couplings mode.The forward power coupling unit of two forward power couplers also can comprise the attenuation network that a decay decoupling is used.The detection mode of its detection device BG1, BG2 is the mode of multiplication of voltage detection or other full-wave detection also.Detection output filter network (L1, C1, C2 and L2, C3, C4) also other low passes, the band that constitute of the LC that has nothing in common with each other of parts number or RC logical or their mix the filter network that forms, and ripple can further be set fall into circuit.But the memory cell electric capacity of previous control level message, but also can use other devices instead, as inductance or other information storage devices.
Double ring automatic power level control circuit for transmitter and can be extended to many ring automatic level control circuits can be compatible mutually with the high standing wave automatic protection circuit in n road, also available other diodes of its germanium switching diode BG1～BG9, transistor, field-effect transistor, relay: controllable silicon replaces.Controlled on-off switch SW1, SW2 are integrated switching circuits, but the also switching circuit formed such as diode, triode, field effect transistor, and the controlled on-off circuit of control device such as relay.
Automatic electric-level control loop switching alarm switch element is common transistor BG6, but also available diode network, field effect transistor, integrated circuit, relay, controllable silicon.Switching alarm mode LED(R) glows, also can change different modes such as sending other coloured light, the sound, gauge outfit indication and digital indication into.The transmission channel of automatic electric-level control voltage is cable, lead but the also transmission channel that forms of optical coupling.
Active controlled device dual-gate MOS field effect transistor BG3 also can use difference pipe and the corresponding integrated circuit thereof that is made of transistor, field effect transistor instead, and also diode or diode mix controlled radio frequency attenuator or the controlled variable gain radio frequency amplifier that constitutes with triode.
The double ring automatic power level control circuit of the compatible high standing wave automatic protection functions of the specific embodiments work of recommending by the present invention, the second loop automatic disconnection when its first loop work.When aforementioned " monocycle automatic level control circuit " such control voltage transmission approach fault takes place, this circuit sends alarm signal (light, the sound maybe can supply the signal of telecommunication of gauge outfit indication etc.) automatically, and for example: the mode of sending ruddiness (or other coloured light) with LED is alarmed.And the second not road automatic connection work meanwhile, A3 continues operate as normal on the power level of former output, the possibility that A3 damages because of blasting or burns when having avoided the first loop direct-current control voltage delivering path fault effectively, and reduced the possibility of interrupting normal transmission, improved the functional reliability of transmitter.And whether the direct-current control voltage delivering path fault of second loop does not all influence the first loop operate as normal, isolates good between loop.Owing to be provided with the imformation memory element of dc control signal, thereby the automatically switch transient process of moment of first and second loop is very mild in the specific embodiments that the present invention recommends.
The present invention has exempted the possibility that the most expensive high power amplifier damages even burns because of blasting in the emitter that causes because of monocycle automatic electric-level control voltage transmission approach fault in the general transmit machine with extremely low cost; Greatly improved the functional reliability of emitter; Emitter complete machine wideband operation characteristic is good; And well compatible with the high standing wave automatic protection functions in n road. Thereby the present invention can be used as the automated radio frequency output power level control circuit in broadcasting, TV, communication, radar and the similar transmitter thereof.
Claims (3)
1; a kind of comprise can be automatically controlled the variable gain radio frequency amplifier or variable radio frequency attenuator (A1) that can be automatically controlled; the high effect of transmitter (A3); forward power coupler GO1; the transmitter of antenna TX double loop automatic level control circuit; the double ring automatic power level control circuit that it is characterized in that compatible high standing wave automatic protection functions is mainly by two forwards or rate coupler; transmit the transmission channel of first loop control voltage; transmit the transmission channel of second loop control voltage; the first loop direct-current control voltage see-saw circuit; the second loop direct-current control voltage see-saw circuit; the one the second control loop control switching circuits, the one the second loop switching alarm circuit; level and smooth decoupling filter circuit; rf gain can be automatically controlled radio frequency amplifier or variable radio frequency attenuator that can be automatically controlled; the high standing wave automatic protection circuit in n road is formed.
Two forward power coupler GO2 comprise: the first loop detector diode BG1, first loop low pass filter that is made of inductance L 1 capacitor C 1 and C2 interconnection; The second loop detector diode BG2, by inductance L 2, second loop low pass filter that capacitor C 3 and C4 interconnection constitute; And coupled transmission line; The output port of the high power amplifier A3 of transmitter links the input port of GO2, and the antenna output end mouth of GO2 links antenna TX, and most radio frequency power outputs of A3 are launched by antenna TX; Fraction forward rf power signal is coupled to the anode of BG1 in GO2, input first loop low pass filter leads to the input port of L1 again after the BG1 detection, another fraction forward rf power signal is coupled to the anode of BG2 in GO2, and the input second loop bandpass filter leads to the input port of transmission channel L2 again after the BG2 detection;
The first loop direct-current control voltage see-saw circuit mainly comprises: the electrical equipment W1 that adjusts first loop direct-current control voltage size usefulness, buffer A4, by resistance R 1～R4, capacitor C 5, and the anti-phase direct current amplifier that constitutes of amplifier A6, transmission channel L1 leads to W1, the travelling arm of W1 links A4's, "+" input, R1, R2, C5 forms the dc partial voltage filter network, one end of resistance R 3 links the output port of A4, and the other end of resistance R 3 is connected to " one " input port of A6 with the port of R4, and the other end of resistance R 4 links the output port of A6.
The second loop direct-current control voltage see-saw circuit comprises: the potentiometer W2 that adjusts second loop direct-current control voltage size usefulness; Buffering amplifier A5; The anti-phase direct current amplifier that constitutes by resistance R 5～R8, capacitor C 6, amplifier A7; Transmission channel L2 leads to W2, the sliding end of W2 links "+" input port of A5, R5, R6, C6 form " ten " reference potential input that its output of dc partial voltage filter network is admitted to A7, the end of R7 links the output port of A5, the port of the other end of R7 and R8 links " one " input port of A7, and the another port of R8 is connected to the output port of A7;
First and second control loop control switching circuit mainly comprises: the reverse voltage comparator that is made of resistance R 9～R12, capacitor C 7 and amplifier A8 etc.; First can be automatically controlled on-off switch circuit SW1; The second reverse voltage comparator that constitutes by resistance R 13～R16, capacitor C8 and amplifier A9; Second can be automatically controlled on-off switch circuit SW2; R9, R10, C7 forms the dc partial voltage filter network, the comparative voltage that A8 is made in output after the dividing potential drop is admitted to "+" reference potential input of A8, the end of R11 links the output port of A6, the other end of R11 links "-" input port of A8 with the port of R12, the another port of R12 links the output port of A8, R13, R14, C8 forms the dc partial voltage filter network, output is admitted to "+" reference potential input of A9 after the dividing potential drop as the comparison reference voltage of A9, the end of R15 links the output port of A8, the other end of R15 links "-" input port of A9 with the port of R16, and the another port of R16 links the output port of A9;
The switching alarm circuit mainly is made up of base stage current-limiting resistance R17, collector electrode current-limiting resistance R18, transistor BG6 and LED (R).LED (R) is gone here and there in the BG6 collector electrode, and R17 one end links the output port of A9 and the S2 port of SW2 simultaneously;
Level and smooth decoupling filter LPF mainly is made up of inductance L 3, resistance R 19, R20 and capacitor C 9～C14.The Σ point is the input port of LPF, and the G2 port is the defeated port of LPF;
Rf gain can comprise by automatically controlled radio frequency amplifying circuit: the radio-frequency input signals coupling matching network that is made of capacitor C 15, C16, resistance R 25; The rf gain that constitutes by resistance R 21～R28, capacitor C 17, C18, inductance L 4 and double grid MDS field-effect transistor BG3 can be automatically controlled radio frequency amplifier; By resistance R 29～R32, capacitor C 19, radio frequency crystals triode BG4, the radio frequency buffering device that BG5 constitutes;
N road high standing wave automatic protection circuit BH and auxiliary circuit thereof comprise: the high standing wave of the first via is protection and anti-phase direct voltage device relatively automatically, constitutes by adjusting potentiometer W3, the resistance R 33～R35 amplifier A10 that current potential relatively uses; The second tunnel high standing wave is the anti-phase direct voltage of protection device relatively automatically, constitutes by adjusting potentiometer W4, resistance R 36～R38, the amplifier A11 that current potential relatively uses; By adjusting the current potential W5 that compares current potential and use, the automatic relatively device of anti-phase direct voltage of protecting of the high standing wave in n road that resistance R 39～R41 amplifier A12 constitutes; And play the auxiliary circuit that the germanium switching diode BG7～BG9 of on-off switch effect constitutes by the capacitor C 20～C22 that plays the decoupling filter action, radio frequency chokes volume L5.
2, according to claim: described double ring automatic power level control circuit for transmitter, it is characterized in that being extended to many ring automatic level control circuits, can be compatible mutually with the high standing wave automatic protection circuit in n road.
3, according to claim: described double ring automatic power level control circuit for transmitter, it is characterized in that the two forward power couplers in the double ring automatic power level control circuit can be by transformer coupled according to the frequency range difference, or microstrip transmission line coupling, the coaxial transmission line coupling, the waveguide coupling, optical cable transmission coupling, and simple capacitive coupled modes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89105437 CN1015850B (en) | 1989-12-28 | 1989-12-28 | Double ring automatic power level control circuit for transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89105437 CN1015850B (en) | 1989-12-28 | 1989-12-28 | Double ring automatic power level control circuit for transmitter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1043593A true CN1043593A (en) | 1990-07-04 |
| CN1015850B CN1015850B (en) | 1992-03-11 |
Family
ID=4856198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89105437 Expired CN1015850B (en) | 1989-12-28 | 1989-12-28 | Double ring automatic power level control circuit for transmitter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1015850B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102098420A (en) * | 2011-02-24 | 2011-06-15 | 广州视源电子科技有限公司 | Video signal output circuit |
| CN102355200A (en) * | 2011-08-01 | 2012-02-15 | 北京航空航天大学 | Single-ended input and differential output parallel dual-frequency low noise amplifier and design method thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102279385B (en) * | 2010-06-08 | 2015-04-15 | 中国科学院空间科学与应用研究中心 | High-linearity radiofrequency power detector |
-
1989
- 1989-12-28 CN CN 89105437 patent/CN1015850B/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102098420A (en) * | 2011-02-24 | 2011-06-15 | 广州视源电子科技有限公司 | Video signal output circuit |
| CN102355200A (en) * | 2011-08-01 | 2012-02-15 | 北京航空航天大学 | Single-ended input and differential output parallel dual-frequency low noise amplifier and design method thereof |
| CN102355200B (en) * | 2011-08-01 | 2014-03-26 | 北京航空航天大学 | Single-ended input and differential output parallel dual-frequency low noise amplifier and design method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1015850B (en) | 1992-03-11 |
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Correction item: Termination of patent right Correct: delete False: 89105437.5 Number: 44 Page: 110 Volume: 9 Correction item: Termination of patent right Correct: delete False: 19921125 Number: 44 Page: 110 Volume: 9 Correction item: Termination of patent right Correct: delete False: H04B1/04 Number: 44 Page: 110 Volume: 9 Correction item: Termination of patent right Correct: delete False: 19891228 Number: 44 Page: 110 Volume: 9 |
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