CN106656363A - Parameter extraction circuit for broadcast supervision receiver and parameter extraction method thereof - Google Patents
Parameter extraction circuit for broadcast supervision receiver and parameter extraction method thereof Download PDFInfo
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- CN106656363A CN106656363A CN201611099397.XA CN201611099397A CN106656363A CN 106656363 A CN106656363 A CN 106656363A CN 201611099397 A CN201611099397 A CN 201611099397A CN 106656363 A CN106656363 A CN 106656363A
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- 230000003321 amplification Effects 0.000 claims abstract description 26
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 26
- 238000001514 detection method Methods 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 11
- 230000005236 sound signal Effects 0.000 claims abstract description 9
- 239000003990 capacitor Substances 0.000 claims description 29
- 239000000284 extract Substances 0.000 claims description 27
- 239000000919 ceramic Substances 0.000 claims description 25
- 239000000203 mixture Substances 0.000 claims description 21
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- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/29—Performance testing
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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
- H04B1/06—Receivers
- H04B1/16—Circuits
Abstract
The invention provides a parameter extraction circuit for a broadcast supervision receiver and a parameter extraction method thereof, which belong to the field of communication and circuits. The parameter extraction circuit mainly comprises a power circuit, a detection circuit, a low-frequency amplifier circuit and a signal output circuit, wherein the power circuit provides power for the detection circuit, an operational amplifier circuit and the signal output circuit; the detection circuit receives target intermediate-frequency signals in need of parameter extraction and sequentially carries out rectification, signal amplification and filtering; signals after detection are inputted to the low-frequency amplifier circuit for low-frequency amplification; signals after low-frequency amplification are inputted to the signal output circuit; the signal output circuit processes the received signals and outputs audio signals, and the peak voltage, the valley voltage, and the mean voltage of detection signals after low-frequency amplification are outputted at the same time. The broadcast supervision receiver parameter extraction method comprises steps of signal input, rectification, signal amplification, filtering, low-frequency amplification, signal voltage extraction and audio output.
Description
Technical field
The present invention relates to the parameter extraction circuit and its parameter extracting method of a kind of broadcast prison wave receiver, belong to communication neck
Domain.
Background technology
With the fast development increased with broadcast technology of broadcast program, people are more next for the requirement of broadcast program contents
Higher, the covering scale of broadcast transmitting station is also increasing.Once there are a lot of great mistakes of broadcasting by mistake and broadcast and demagogy in the country
The event of reaction speech, additionally due to lacking the regulatory measure in effective programme content and source, intercutting for remote districts is illegal
The event of advertisement is also countless, therefore the monitoring to broadcast program is always the heavier problem for regarding of China.
At present, China about sets up more than 2,000 broadcast broadcasting agency.For the management of so many broadcast broadcasting agency
The radio and television departments in corresponding place at different levels have been set up again, and they are the Industry regulatory bodies of radio and television, are specifically designed in broadcast
The program played on TV carries out administration, mainly carries out subsequent supervision in terms of content, playing duration etc. is played.Currently
Broadcast monitoring means be mainly manually to monitor, based on measuring apparatus, multichannel monitor.Its monitoring precision is not high, prison
Survey monitoring data and be unable to real time record.Present broadcast supervision department can pass through automatic data collection broadcast singal in the urgent need to one kind
Parameter supervises broadcast system come the broadcast for monitoring broadcast playback.
The content of the invention
The parameter extraction circuit and its ginseng of a kind of broadcast prison wave receiver are provided during the technical problem to be solved
Number extracting method, can extract crest voltage, valley point voltage and the equal threshold voltage of rectified signal, while exports audio signal,
The modulation degree of signal can be calculated by these data, it is also possible to as the feedback parameter of automatic growth control, realize to this
Shake the automatic growth control of signal.
The technical solution used in the present invention is：A kind of parameter extraction circuit of broadcast prison wave receiver, including power circuit
1st, detecting circuit 2, low-frequency amplifier circuit 3, signal output apparatus 4,
The power circuit 1 is connected to detecting circuit 2, low-frequency amplifier circuit 3, the corresponding power end of signal output apparatus 4,
The output end of detecting circuit 2 connects the input of low-frequency amplifier circuit 3, the output end connection signal output of low-frequency amplifier circuit 3
The input of circuit 4, the power circuit 1 includes that direct voltage source U1, direct voltage source U1 can export+12V's and -12V
DC voltage, detecting circuit 2 be used for receive need extracting parameter target intermediate-freuqncy signal carry out rectification, signal amplify and
Filtering, low-frequency amplifier circuit 3 is used to carry out the signal after the process of detecting circuit 2 low frequency amplification, and signal output apparatus 4 are used to carry
Take crest voltage, equal threshold voltage, valley point voltage and the audio signal of the rectified signal after low frequency amplifies.
Specifically, described detecting circuit 2 include resistance R10, R11, R12, R13, R14, R15, diode D1 and two D2,
Ceramic condenser C8, operational amplifier UC1, wherein resistance R10, R11, R12 and diode D1, D2 and operational amplifier UC1 are constituted
Rectification circuit, resistance R13, R14 and operational amplifier UC1 composition composition operational amplification circuits, resistance R15 and ceramic condenser C8 groups
Into filter circuit, the operational amplifier that rectification circuit and operational amplification circuit are used is on same integrated operational amplifier UC
Different port, operational amplifier UC adopts the operational amplifier of model AD827；
Access the target intermediate-freuqncy signal for needing extracting parameter, another terminating resistor R11 of resistance R10 in one end of resistance R10
One end and diode D1 positive pole and 2 pins of operational amplifier UC1；The negative pole of another terminating diode D2 of resistance R11
With one end and one end of resistance R13 of resistance R12；The negative pole of diode D1 meets the positive pole of diode D2 and operational amplifier UC1
1 pin, the other end ground connection of 3 pins of operational amplifier UC1 and R12；One end of another termination R14 of resistance R13 and fortune
Calculate 6 pins of amplifier UC1；One end of another terminating resistor R15 of R14 and 7 pins of operational amplifier UC1, operation amplifier
5 pins of device UC1 and one end ground connection of ceramic condenser C8；The other end of another termination ceramic condenser C8 of resistance R15, and thus
Tie point accesses low-frequency amplifier circuit 3 as output end.
Specifically, described low-frequency amplifier circuit 3 includes resistance R16, R18, potentiometer R17, operational amplifier UA, computing
Amplifier UA adopts the operational amplifier of model TL084, the output end of a termination detecting circuit 2 of resistance R16, resistance R16
One end of another termination potentiometer R17 and 2 pins of operational amplifier UA；One end of resistance R18 and 3 pipes of operational amplifier UA
Pin is grounded；4 pins and 11 pins of operational amplifier UA meet respectively+the 12V and -12V of direct voltage source U1 in power circuit 1；
Two ends and three ends of potentiometer R17 connect after connecting resistance R18 the other end and 1 pin of operational amplifier UA, and put by computing
1 pin of big device UA is connected to signal output apparatus 4 as output end.
Specifically, the signal output apparatus 4 include, resistance R19, R20, R21, R22, R23, R24, R25, R26, R27,
Potentiometer R28, operational amplifier UA, operational amplifier UA using model TL084 operational amplifier, diode D3, D4,
D5, D6, electrochemical capacitor C9, C10, C11, ceramic condenser C12, output interface U14, wherein, resistance R19, R20, R21 and diode
D3, D4 and operational amplifier UA and electrochemical capacitor C9 composition DC voltage peak values extract circuit, resistance R22, R23 and operation amplifier
Device UA and electrochemical capacitor C10 composition DC voltage averages extract circuit, resistance R24, R25, R26 and diode D5, D6 and computing
Amplifier UA and electrochemical capacitor C11 composition DC voltage valleies extract circuit, resistance R27 and potentiometer R28 and ceramic condenser C12
Composition audio output circuit；
The input that one end of resistance R19, R22, R24, R27 connects as signal output apparatus 4, reception is put from low frequency
The signal of the big output end of circuit 3；The other end of resistance R19, R22, R24, R27 connects respectively 5 pins of operational amplifier UA, 12 pipes
One end of pin, 10 pins and potentiometer R28；7 pins of operational amplifier UA connect the negative of the positive pole of diode D3 and diode D4
Pole, 6 pins of operational amplifier UA connect the positive pole of diode D4 and one end of resistance R20, another terminating diode of resistance R20
One end of the negative pole of D3 and 1 pin of output interface U14 and resistance R21, another termination electrochemical capacitor C9 of resistance R21 is just
Pole, the minus earth of electrochemical capacitor C9；13 pins of operational amplifier UA connect 14 pins of operational amplifier UA and resistance R23's
One end, 2 pins and the positive pole of electrochemical capacitor C10 of another termination output interface U14 of resistance R23, the negative pole of electrochemical capacitor C10
Ground connection；8 pins of operational amplifier UA connect the negative pole of diode D5 and the positive pole of diode D6,9 pins of operational amplifier UA
Connect the negative pole of diode D6 and one end of resistance R25, the positive pole and output interface U14 of another terminating diode D5 of resistance R25
3 pins and resistance R26 one end, the positive pole of another termination electrochemical capacitor C11 of resistance R26, the negative pole of electrochemical capacitor C11 connects
Ground；Two ends and three ends of potentiometer R28 connect respectively one end of ceramic condenser C12 and ground, another termination output of ceramic condenser C12
4 pins of interface U14.
Preferably, described diode D1, D2, D3, D4, D5, D6 uses the diode of model 1N60.
Preferably, the times magnification of low frequency amplification can be controlled by adjusting the resistance of potentiometer R17 in low-frequency amplifier circuit 3
Number.
A kind of parameter extracting method of broadcast prison wave receiver, comprises the steps：
The first step, the input of detecting circuit 2 receives the target intermediate-freuqncy signal for needing extracting parameter, carry out successively rectification,
Signal amplifies and filters, and by the signal output after detection to low-frequency amplifier circuit 3；
Second step, the input of low-frequency amplifier circuit 3 receives the signal from the output end of detecting circuit 2, carries out low frequency and puts
Greatly, the signal output after and is amplified low frequency is to signal output apparatus 4；
3rd step, the input of signal output apparatus 4 receives the signal from the output end of low-frequency amplifier circuit 3, Jing Guoxin
DC voltage peak value in number output circuit 4 extracts circuit, DC voltage average and extracts circuit, DC voltage valley and extracts electricity
Road, audio output circuit, output low frequency amplifies crest voltage, equal threshold voltage, valley point voltage and the audio frequency letter of post-detection signal
Number.
The present invention operation principle be：Power circuit 1 is detecting circuit 2, operational amplification circuit 3 and signal output apparatus 4
Power supply, detecting circuit 2 receives the target intermediate-freuqncy signal for needing extracting parameter, rectification, signal is carried out successively and is amplified and is filtered, detection
Signal input low-frequency amplifier circuit 3 afterwards carries out low frequency amplification, the signal input signal output apparatus 4 after low frequency amplification, signal
The signal of 4 pairs of receptions of output circuit is processed, exports audio signal, while the peak value of the rectified signal after output low frequency amplifies
Voltage, valley point voltage, equal threshold voltage.
The invention has the beneficial effects as follows：The integrated electricity such as operational amplifier A D827 and TL084 is adopted in the circuit of the present invention
Road, increased the integrated level of circuit, reduce the complexity of circuit, make the installation and debugging of circuit convenient；Electricity of the invention
Road can extract crest voltage, valley point voltage and the equal threshold voltage of rectified signal, while exports audio signal, by these numbers
According to the modulation degree that can calculate signal, it is also possible to as the feedback parameter of automatic growth control, realize to local oscillation signal from
Dynamic gain control.
Description of the drawings
Fig. 1 is the circuit block diagram of parameter extraction circuit of the present invention；
Fig. 2 is the flow chart of parameter extracting method of the present invention；
Fig. 3 is the circuit diagram of power circuit 1 in Fig. 1；
Fig. 4 is the circuit diagram of detecting circuit 2 in Fig. 1；
Fig. 5 is the circuit diagram of low-frequency amplifier circuit 3 in Fig. 1；
Fig. 6 is the circuit diagram of signal output apparatus 4 in Fig. 1；
Fig. 7 is the complete circuit diagram of connection of parameter extraction circuit of the present invention.
Respectively it is numbered in figure：1- power circuits, 2- detecting circuits, 3- low-frequency amplifier circuits, 4- signal output apparatus.
Specific embodiment
Below in conjunction with drawings and Examples, the present invention is further elaborated, but the content of the invention of the present invention be not limited to it is described
Scope.
Embodiment 1：As shown in figs. 1-7, a kind of parameter extraction circuit of broadcast prison wave receiver, including power circuit 1, inspection
Wave circuit 2, low-frequency amplifier circuit 3, signal output apparatus 4,
The power circuit 1 is connected to detecting circuit 2, low-frequency amplifier circuit 3, the corresponding power end of signal output apparatus 4,
The output end of detecting circuit 2 connects the input of low-frequency amplifier circuit 3, the output end connection signal output of low-frequency amplifier circuit 3
The input of circuit 4, the power circuit 1 includes that direct voltage source U1, direct voltage source U1 can export+12V's and -12V
DC voltage, detecting circuit 2 be used for receive need extracting parameter target intermediate-freuqncy signal carry out rectification, signal amplify and
Filtering, low-frequency amplifier circuit 3 is used to carry out the signal after the process of detecting circuit 2 low frequency amplification, and signal output apparatus 4 are used to carry
Take crest voltage, equal threshold voltage, valley point voltage and the audio signal of the rectified signal after low frequency amplifies.
Further, described detecting circuit 2 includes resistance R10, R11, R12, R13, R14, R15, diode D1 and two
D2, ceramic condenser C8, operational amplifier UC1, wherein resistance R10, R11, R12 and diode D1, D2 and operational amplifier UC1 groups
Into rectification circuit, resistance R13, R14 and operational amplifier UC1 composition composition operational amplification circuits, resistance R15 and ceramic condenser C8
Composition filter circuit, the operational amplifier that rectification circuit and operational amplification circuit are used is on same integrated operational amplifier UC
Different port, operational amplifier UC using model AD827 operational amplifier；
Access the target intermediate-freuqncy signal for needing extracting parameter, another terminating resistor R11 of resistance R10 in one end of resistance R10
One end and diode D1 positive pole and 2 pins of operational amplifier UC1；The negative pole of another terminating diode D2 of resistance R11
With one end and one end of resistance R13 of resistance R12；The negative pole of diode D1 meets the positive pole of diode D2 and operational amplifier UC1
1 pin, the other end ground connection of 3 pins of operational amplifier UC1 and R12；One end of another termination R14 of resistance R13 and fortune
Calculate 6 pins of amplifier UC1；One end of another terminating resistor R15 of R14 and 7 pins of operational amplifier UC1, operation amplifier
5 pins of device UC1 and one end ground connection of ceramic condenser C8；The other end of another termination ceramic condenser C8 of resistance R15, and thus
Tie point accesses low-frequency amplifier circuit 3 as output end.
Further, described low-frequency amplifier circuit 3 includes resistance R16, R18, potentiometer R17, operational amplifier UA, fortune
Calculate operational amplifiers of the amplifier UA using model TL084, the output end of a termination detecting circuit 2 of resistance R16, resistance
One end of another termination potentiometer R17 of R16 and 2 pins of operational amplifier UA；One end of resistance R18 and operational amplifier UA's
3 pins are grounded；4 pins and 11 pins of operational amplifier UA connect respectively in power circuit 1+the 12V of direct voltage source U1 and-
12V；Two ends and three ends of potentiometer R17 connect after connecting resistance R18 the other end and 1 pin of operational amplifier UA, and by transporting
1 pin of amplifier UA is calculated as output end, signal output apparatus 4 are connected to.
Further, the signal output apparatus 4 include, resistance R19, R20, R21, R22, R23, R24, R25, R26,
R27, potentiometer R28, operational amplifier UA, operational amplifier UA using model TL084 operational amplifier, diode D3,
D4, D5, D6, electrochemical capacitor C9, C10, C11, ceramic condenser C12, output interface U14, wherein, resistance R19, R20, R21 and two
Pole pipe D3, D4 and operational amplifier UA and electrochemical capacitor C9 composition DC voltage peak values extract circuit, resistance R22, R23 and computing
Amplifier UA and electrochemical capacitor C10 composition DC voltage averages extract circuit, resistance R24, R25, R26 and diode D5, D6 and
Operational amplifier UA and electrochemical capacitor C11 composition DC voltage valleies extract circuit, resistance R27 and potentiometer R28 and ceramic electrical
Hold C12 composition audio output circuits；
The input that one end of resistance R19, R22, R24, R27 connects as signal output apparatus 4, reception is put from low frequency
The signal of the big output end of circuit 3；The other end of resistance R19, R22, R24, R27 connects respectively 5 pins of operational amplifier UA, 12 pipes
One end of pin, 10 pins and potentiometer R28；7 pins of operational amplifier UA connect the negative of the positive pole of diode D3 and diode D4
Pole, 6 pins of operational amplifier UA connect the positive pole of diode D4 and one end of resistance R20, another terminating diode of resistance R20
One end of the negative pole of D3 and 1 pin of output interface U14 and resistance R21, another termination electrochemical capacitor C9 of resistance R21 is just
Pole, the minus earth of electrochemical capacitor C9；13 pins of operational amplifier UA connect 14 pins of operational amplifier UA and resistance R23's
One end, 2 pins and the positive pole of electrochemical capacitor C10 of another termination output interface U14 of resistance R23, the negative pole of electrochemical capacitor C10
Ground connection；8 pins of operational amplifier UA connect the negative pole of diode D5 and the positive pole of diode D6,9 pins of operational amplifier UA
Connect the negative pole of diode D6 and one end of resistance R25, the positive pole and output interface U14 of another terminating diode D5 of resistance R25
3 pins and resistance R26 one end, the positive pole of another termination electrochemical capacitor C11 of resistance R26, the negative pole of electrochemical capacitor C11 connects
Ground；Two ends and three ends of potentiometer R28 connect respectively one end of ceramic condenser C12 and ground, another termination output of ceramic condenser C12
4 pins of interface U14.
The operational amplifier that rectification circuit and operational amplification circuit in detecting circuit 2 is used is that same integrated computation is put
Different port on big device UC, operational amplifier UC adopts the operational amplifier of model AD827.Low-frequency amplifier circuit 3 and letter
DC voltage peak value in number output circuit 4 extracts circuit, DC voltage average and extracts circuit, DC voltage valley and extracts circuit
The different port on same integrated operational amplifier UA, operational amplifier UA is used to adopt the computing of model TL084
Amplifier.
Further, described diode D1, D2, D3, D4, D5, D6 uses the diode of model 1N60.
Further, the amplification of low frequency amplification can be controlled by adjusting the resistance of potentiometer R17 in low-frequency amplifier circuit 3
Multiple.
It is a kind of broadcast prison wave receiver parameter extracting method, including signal input, rectification, signal amplify and filter, it is low
Frequency amplification, parameter extraction and audio output, specially following steps：
The first step, the input of detecting circuit 2 receives the target intermediate-freuqncy signal for needing extracting parameter, carry out successively rectification,
Signal amplifies and filters, and by the signal output after detection to low-frequency amplifier circuit 3；
Second step, the input of low-frequency amplifier circuit 3 receives the signal from the output end of detecting circuit 2, carries out low frequency and puts
Greatly, the signal output after and is amplified low frequency is to signal output apparatus 4；
3rd step, the input of signal output apparatus 4 receives the signal from the output end of low-frequency amplifier circuit 3, Jing Guoxin
DC voltage peak value in number output circuit 4 extracts circuit, DC voltage average and extracts circuit, DC voltage valley and extracts electricity
Road, audio output circuit, output low frequency amplifies crest voltage, equal threshold voltage, valley point voltage and the audio frequency letter of post-detection signal
Number.
The output end of detecting circuit connects one end of R16 in low-frequency amplifier circuit in Fig. 5 in Fig. 4, and low frequency amplifies electricity in Fig. 5
The output end on road connects one end of R22 in signal output apparatus in Fig. 6.
Referring to Fig. 1, Fig. 2 and Fig. 7, it would be desirable to which the target intermediate-freuqncy signal of extracting parameter is input into the receiving terminal of detecting circuit, i.e.,
One end of resistance R10, sequentially passes through rectification circuit, operational amplification circuit, the filter circuit in detecting circuit, by resistance R15 and
Rectified signal is input to the receiving terminal of low-frequency amplifier circuit, i.e. resistance R16 by the tie point of ceramic condenser C8 as output end
One end, and the multiple that low frequency amplifies is controlled by adjusting potentiometer R17, by 1 pin of operational amplifier UA as output end, will
, to the receiving terminal of signal output apparatus, the signal after low frequency amplification is by signal output apparatus for signal input after low frequency amplification
DC voltage peak value extract circuit, DC voltage average extract circuit, DC voltage valley extract circuit, audio output circuit
It is sequentially output crest voltage, valley point voltage, equal threshold voltage and audio signal that low frequency amplifies post-detection signal.
Broadcast can be drawn by the crest voltage to extracting, valley point voltage, the analysis of average voltage parameter and calculating
The modulation degree of amplitude-modulated wave, it is also possible to which these parameters are used as into the feedback parameter of automatic growth control, for example, by the average electricity for extracting
Pressure parameter returns to the local oscillation signal input of receiver, can pass through to differentiate the threshold value whether equal threshold voltage exceedes setting,
To control the magnitude of voltage of local oscillation signal, so that output average voltage stabilization reaches the mesh of automatic growth control in threshold range
's.The audio signal that signal output apparatus are exported accesses the equipment such as sound equipment, plays out.
Above in association with accompanying drawing to the present invention specific embodiment be explained in detail, but the present invention be not limited to it is above-mentioned
Embodiment, in the ken that those of ordinary skill in the art possess, can be with before without departing from present inventive concept
Put that various changes can be made.
Claims (8)
1. the parameter extraction circuit of wave receiver is supervised in a kind of broadcast, it is characterised in that：Including power circuit (1), detecting circuit
(2), low-frequency amplifier circuit (3), signal output apparatus (4),
The power circuit (1) is connected to the corresponding electricity of detecting circuit (2), low-frequency amplifier circuit (3), signal output apparatus (4)
Source, the input of output end connection low-frequency amplifier circuit (3) of detecting circuit (2), the output end of low-frequency amplifier circuit (3) connects
The input of signal output apparatus (4) is connect, including direct voltage source U1, direct voltage source U1 can be defeated for the power circuit (1)
Go out the DC voltage of+12V and -12V, detecting circuit (2) to the target intermediate-freuqncy signal of extracting parameter that needs for receiving for entering
Row rectification, signal are amplified and are filtered, and low-frequency amplifier circuit (3) is put for carrying out low frequency to the signal after detecting circuit (2) process
Greatly, signal output apparatus (4) for extract the crest voltage of rectified signal after low frequency amplifies, equal threshold voltage, valley point voltage and
Audio signal.
2. the parameter extraction circuit of wave receiver is supervised in a kind of broadcast according to claim 1, it is characterised in that：Described inspection
Wave circuit (2) includes resistance R10, R11, R12, R13, R14, R15, diode D1 and two D2, ceramic condenser C8, operational amplifier
UC1, wherein resistance R10, R11, R12 and diode D1, D2 and operational amplifier UC1 composition rectification circuit, resistance R13, R14 and
Operational amplifier UC1 composition composition operational amplification circuit, resistance R15 and ceramic condenser C8 composition filter circuit, rectification circuit and
The operational amplifier that operational amplification circuit is used is the different port on same integrated operational amplifier UC, operational amplifier UC
Using the operational amplifier of model AD827；
The target intermediate-freuqncy signal for needing extracting parameter is accessed in one end of resistance R10, and the one of another terminating resistor R11 of resistance R10
End and the positive pole and 2 pins of operational amplifier UC1 of diode D1；The negative pole and electricity of another terminating diode D2 of resistance R11
One end of resistance R12 and one end of resistance R13；The negative pole of diode D1 connects 1 pipe of the positive pole of diode D2 and operational amplifier UC1
Pin, 3 pins of operational amplifier UC1 and the other end ground connection of R12；One end of another termination R14 of resistance R13 and operation amplifier
6 pins of device UC1；One end of another terminating resistor R15 of R14 and 7 pins of operational amplifier UC1, operational amplifier UC1's
One end ground connection of 5 pins and ceramic condenser C8；The other end of another termination ceramic condenser C8 of resistance R15, and be thus connected a little
Low-frequency amplifier circuit (3) is accessed as output end.
3. the parameter extraction circuit of wave receiver is supervised in a kind of broadcast according to claim 1, it is characterised in that：Described is low
Frequency amplifying circuit (3) includes resistance R16, R18, and potentiometer R17, operational amplifier UA, operational amplifier UA adopts model
The operational amplifier of TL084, the output end of termination detecting circuit (2) of resistance R16, another termination potentiometer R17 of resistance R16
One end and operational amplifier UA 2 pins；One end of resistance R18 and the 3 pins ground connection of operational amplifier UA；Operational amplifier
4 pins and 11 pins of UA meet respectively+the 12V and -12V of direct voltage source U1 in power circuit (1)；Two ends of potentiometer R17
1 pin of the other end of connecting resistance R18 and operational amplifier UA after connecting with three ends, and made by 1 pin of operational amplifier UA
For output end, signal output apparatus (4) are connected to.
4. the parameter extraction circuit of wave receiver is supervised in a kind of broadcast according to claim 1, it is characterised in that：
The signal output apparatus (4) include, resistance R19, R20, R21, R22, R23, R24, R25, R26, R27, potentiometer
R28, operational amplifier UA, operational amplifier UA adopt the operational amplifier of model TL084, diode D3, D4, D5, D6, electricity
Solution electric capacity C9, C10, C11, ceramic condenser C12, output interface U14, wherein, resistance R19, R20, R21 and diode D3, D4 and
Operational amplifier UA and electrochemical capacitor C9 composition DC voltage peak values extract circuit, resistance R22, R23 and operational amplifier UA and
Electrochemical capacitor C10 composition DC voltage averages extract circuit, resistance R24, R25, R26 and diode D5, D6 and operational amplifier
UA and electrochemical capacitor C11 composition DC voltage valleies extract circuit, resistance R27 and potentiometer R28 and ceramic condenser C12 composition sounds
Frequency output circuit；
The input that one end of resistance R19, R22, R24, R27 connects as signal output apparatus (4), receives and amplifies from low frequency
The signal of circuit (3) output end；The other end of resistance R19, R22, R24, R27 connects respectively 5 pins of operational amplifier UA, 12 pipes
One end of pin, 10 pins and potentiometer R28；7 pins of operational amplifier UA connect the negative of the positive pole of diode D3 and diode D4
Pole, 6 pins of operational amplifier UA connect the positive pole of diode D4 and one end of resistance R20, another terminating diode of resistance R20
One end of the negative pole of D3 and 1 pin of output interface U14 and resistance R21, another termination electrochemical capacitor C9 of resistance R21 is just
Pole, the minus earth of electrochemical capacitor C9；13 pins of operational amplifier UA connect 14 pins of operational amplifier UA and resistance R23's
One end, 2 pins and the positive pole of electrochemical capacitor C10 of another termination output interface U14 of resistance R23, the negative pole of electrochemical capacitor C10
Ground connection；8 pins of operational amplifier UA connect the negative pole of diode D5 and the positive pole of diode D6,9 pins of operational amplifier UA
Connect the negative pole of diode D6 and one end of resistance R25, the positive pole and output interface U14 of another terminating diode D5 of resistance R25
3 pins and resistance R26 one end, the positive pole of another termination electrochemical capacitor C11 of resistance R26, the negative pole of electrochemical capacitor C11 connects
Ground；Two ends and three ends of potentiometer R28 connect respectively one end of ceramic condenser C12 and ground, another termination output of ceramic condenser C12
4 pins of interface U14.
5. the parameter extraction circuit of wave receiver is supervised in a kind of broadcast according to claim 2, it is characterised in that：Described two
Pole pipe D1, D2 uses the diode of model 1N60.
6. the parameter extraction circuit of wave receiver is supervised in a kind of broadcast according to claim 4, it is characterised in that：Described two
Pole pipe D3, D4, D5, D6 use the diode of model 1N60.
7. the parameter extraction circuit of wave receiver is supervised in a kind of broadcast according to claim 3, it is characterised in that：Low frequency amplifies
The multiplication factor of low frequency amplification can be controlled in circuit (3) by adjusting the resistance of potentiometer R17.
8. the parameter extracting method of wave receiver is supervised in a kind of broadcast, it is characterised in that：Comprise the steps：
The first step, the input of detecting circuit (2) receives the target intermediate-freuqncy signal for needing extracting parameter, and rectification, letter are carried out successively
Number amplify and filter, and by the signal output after detection to low-frequency amplifier circuit (3)；
Second step, the input of low-frequency amplifier circuit (3) receives the signal from detecting circuit (2) output end, carries out low frequency and puts
Greatly, the signal output after and is amplified low frequency is to signal output apparatus (4)；
3rd step, the input of signal output apparatus (4) receives the signal from low-frequency amplifier circuit (3) output end, Jing Guoxin
DC voltage peak value in number output circuit (4) extracts circuit, DC voltage average and extracts circuit, DC voltage valley and extracts electricity
Road, audio output circuit, output low frequency amplifies crest voltage, equal threshold voltage, valley point voltage and the audio frequency letter of post-detection signal
Number.
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