CN110504931A - A kind of computer network signal transmission amplifying circuit - Google Patents
A kind of computer network signal transmission amplifying circuit Download PDFInfo
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- CN110504931A CN110504931A CN201910815674.XA CN201910815674A CN110504931A CN 110504931 A CN110504931 A CN 110504931A CN 201910815674 A CN201910815674 A CN 201910815674A CN 110504931 A CN110504931 A CN 110504931A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/45—Differential amplifiers
- H03F3/45071—Differential amplifiers with semiconductor devices only
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/68—Combinations of amplifiers, e.g. multi-channel amplifiers for stereophonics
Abstract
A kind of computer network signal of the invention transmits amplifying circuit, the differential reception circuit receives computer network signal input part signal using high input impedance difference amplifier, enter low noise pre-amplification circuit later, preposition amplify by a small margin by the low-noise amplification circuit that metal-oxide-semiconductor T1 is core, and pass through signal of the triode Q1 and triode Q2 amendment higher than+5V or the signal lower than 0V, operational amplifier AR3 is by output signal positive feedback or negative-feedback, to guarantee the stability of amplification, triode Q3 is used through complementary feedback modulation circuit again later, Q4, the voltage regulator circuit combination metal-oxide-semiconductor T2 of Q5 composition, triode Q6 and metal-oxide-semiconductor T3, the 0-5V signal of input is switched to stable+3V-15V signal by the complementary circuit of triode Q8 composition, realization linearly may be used Control amplification is most output to computer network signal output end after emitter following output circuit reduces output impedance, pressure stabilizing, further filters afterwards.Avoid that output signal strength is unstable and the problem that cannot be detected.
Description
Technical field
The present invention relates to network signal transmission technique fields, transmit amplification electricity more particularly to a kind of computer network signal
Road.
Background technique
It is all that geographical location is different, and multiple computer systems with standalone feature pass through communication equipment and route company
The system for picking up and, and realize network resources locating with the network software of perfect in shape and function, can be described as computer network, it is people
The tool that information interchange uses, and when network signal in the prior art is through some transmission medium, no matter wire transmission is situated between
Matter or wireless transmission medium, the intensity of signal all can carry out different degrees of decaying with the increase of distance, affect network letter
Number transmission speed, will cause network signal output end (receiver) non-detectable problem when serious, therefore, need to be to entering network
The network signal of signal output end (receiver) amplifies.
The prior art application No. is: a kind of 201510024084.7 network signal transmits amplifying circuit, by network signal
Amplified by the first amplifier, amplified signal is amplified through the second amplifier, amplified signal again later through third capacitor filtering
It is exported after triode amplifies again again, improves work efficiency, is easy to use, there is the value promoted and used, still, on
It states that device structure is simple, the amplification of multiple can only be fixed, different degrees of put cannot be carried out according to the network signal intensity of input
Greatly, it will cause the unstable problem of output signal strength.
So the present invention provides the new scheme of one kind to solve the problems, such as this.
Summary of the invention
For above situation, for the defect for overcoming the prior art, purpose of the present invention is to provide a kind of computer networks
Signal transmits amplifying circuit, have be skillfully constructed, the characteristic of human oriented design, the effective solution prior art cannot according to net
Network signal strength carries out different degrees of amplification, causes the problem that output signal strength is unstable.
Its technical solution solved is, including differential reception circuit, low noise pre-amplification circuit, complementary feedback amplitude modulation electricity
Road, emitter following output circuit, the differential high input resistance for receiving circuit and operational amplifier AR1, AR2 being used to form for core
Anti- differential amplifier receives computer network signal input part signal, to obtain maximum computer network signal network signal,
Later enter low noise pre-amplification circuit, by metal-oxide-semiconductor T1 be core low-noise amplification circuit carry out it is preposition amplify by a small margin, and
By signal of the triode Q1 and triode Q2 amendment higher than+5V or lower than the signal of 0V, operational amplifier AR3 is by output signal
Positive feedback or negative-feedback, to guarantee the stability of amplification, it is defeated that the complementary feedback modulation circuit receives low noise pre-amplification circuit
Signal out, voltage regulator circuit combination metal-oxide-semiconductor T2, the triode Q6 and metal-oxide-semiconductor T3, triode Q8 formed with triode Q3, Q4, Q5
The 0-5V signal of input is switched to stable+3V-15V signal by the complementary circuit of composition, linear controllable amplification is realized, most afterwards through penetrating
Pole follows output circuit emitter following reduction output impedance, voltage-stabiliser tube pressure stabilizing, filter circuit to be output to calculating after further filtering
Machine network signal output end.
Due to the use of above technical scheme, the invention has the following advantages over the prior art: using high input resistance
Anti- differential amplifier receives computer network signal input part signal, to obtain maximum computer network signal network signal,
Later by metal-oxide-semiconductor T1 be core low-noise amplification circuit carry out it is preposition amplify by a small margin, and pass through triode Q1 and triode
Signal of the Q2 amendment higher than+5V or the signal lower than 0V, operational amplifier AR3 is by output signal positive feedback or negative-feedback, to protect
The stability of amplification is demonstrate,proved, output meets the 0-5V signal of signal amplitude requirement, then the pressure stabilizing by triode Q3, Q4, Q5 composition
The complementary circuit of circuit combination metal-oxide-semiconductor T2, triode Q6 and metal-oxide-semiconductor T3, triode Q8 composition switchs to the 0-5V signal of input
Stable+3V-15V signal realizes controllable linear amplification, most reduces output impedance, voltage-stabiliser tube pressure stabilizing, filtering through emitter following afterwards
Circuit is output to computer network signal output end after further filtering, different degrees of put can be carried out according to network signal intensity
Greatly, avoid that output signal strength is unstable and the problem that cannot be detected.
Detailed description of the invention
Fig. 1 is differential reception circuit diagram of the invention.
Fig. 2 is low noise pre-amplification circuit schematic diagram of the invention.
Fig. 3 is complementary feedback modulation circuit schematic diagram of the invention.
Fig. 4 is emitter following output circuit schematic diagram of the invention.
Specific embodiment
For the present invention aforementioned and other technology contents, feature and effect, in following cooperation with reference to figures 1 through Fig. 4 pairs
In the detailed description of embodiment, can clearly it present.The structure content being previously mentioned in following embodiment is attached with specification
Figure is reference.
Each exemplary embodiment of the invention is described below with reference to accompanying drawings.
A kind of computer network signal transmission amplifying circuit, including differential reception circuit, low noise pre-amplification circuit, complementation
Modulation circuit, emitter following output circuit are fed back, the low noise pre-amplification circuit receives the differential signal for receiving circuit output,
Pass through the low noise amplification of metal-oxide-semiconductor T1, resistance R6, resistance R7, resistance R12- resistance R14 and potentiometer RW1, capacitor C2, C3 composition
Circuit carries out preposition amplification, (since when amplifying small-signal, the noise of amplifier itself is very serious to the interference of signal, benefit
With the characteristic that field-effect tube T1 input impedance is big and output impedance is small, low noise amplifier is formed), amplified signal is through potentiometer
It is added to the base stage of triode Q1 and triode Q2 after RW1 sampling through resistance R15, resistance R16 respectively, the signal higher than+5V is added to
The emitter junction of triode Q1, triode Q1 conducting, for the signal of+5V to rear class circuit transmission, the signal lower than 0V is added to triode
The emitter junction of Q2, triode Q2 conducting, the signal of 0V plays the role of correcting abnormal signal to rear class circuit transmission, and passes through
Acquisition is added to the non-inverting input terminal and inverting input terminal of operational amplifier AR3 by the amplified signal before and after resistance R14, than
When the fluctuation of signal forward direction is big after relatively, diode D2 conducting, signal negative-feedback to the source electrode of metal-oxide-semiconductor T1 reduces the amplitude of fluctuation, bears
To when fluctuating big, diode D1 conducting, the positive and negative grid for being fed to metal-oxide-semiconductor T1 of signal reduces the amplitude of fluctuation, to guarantee low noise
Big stability, output meet the 0-5V signal of signal amplitude requirement, including one end of resistance R6, resistance R6 connect operation amplifier
The output end of device AR2, the other end of resistance R6 are separately connected one end of ground resistance R7, one end of ground capacity C2, resistance R13
One end, metal-oxide-semiconductor T1 grid, the source electrode of metal-oxide-semiconductor T1 is separately connected one end of one end of ground resistance R12, ground capacity C3,
The drain electrode of metal-oxide-semiconductor T1 be separately connected one end of resistance R14, the lower end of potentiometer RW1, resistance R9 one end, resistance R13's is another
End, the upper end of potentiometer RW1, triode Q1 collector be all connected with power supply+5V, the adjustable end of potentiometer RW1 connects resistance R15
One end, one end of resistance R16, triode Q1 base stage, the base stage of the other end connecting triode Q2 of resistance R16, triode
The collector of Q2 connects ground, and the other end of resistance R14 is separately connected one end of one end of resistance R10, capacitor C6, and capacitor C6's is another
The emitter of the emitter of one end connecting triode Q1, triode Q2, the other end of resistance R10 are separately connected operational amplifier
One end of the inverting input terminal of AR3, resistance R11, the other end of resistance R9 are separately connected the homophase input of operational amplifier AR3
End, ground resistance R8 one end, the output end of operational amplifier AR3 be separately connected the other end of resistance R11, diode D1 it is negative
Pole, diode D2 anode, the grid of the anode connection metal-oxide-semiconductor T1 of diode D1, the cathode connection metal-oxide-semiconductor T1 of diode D2
Source electrode；
The complementary feedback modulation circuit receives low noise pre-amplification circuit output signal, with triode Q3, Q4, Q5, resistance
The voltage regulator circuit of R17- resistance R18 composition carries out controllable pressure stabilizing, in conjunction with metal-oxide-semiconductor T2, triode Q6 and metal-oxide-semiconductor T3, triode Q8
The 0-5V signal of input is switched to stable+3V-15V signal by the complementary circuit of composition, and wherein triode Q3, Q4 is compound adjustment
Pipe, when the CE for being added to triode Q5, which ties signal (namely photoelectrical coupler feed back voltage) amplitude of variation, is less than 0.3V,
The CE junction voltage of triode Q5 is also fluctuated in 0.3V range, and compound adjustment pipe BE junction voltage is basically unchanged, and output voltage is constant, greatly
When 0.3V, the size of the CE junction voltage of triode Q5 causes compound adjustment pipe BE junction voltage with variation, exports steady change
+ 3V-+15V, and the complementation that the CE junction voltage of triode Q5 is made of metal-oxide-semiconductor T2, triode Q6 and metal-oxide-semiconductor T3, triode Q8
The 0-5V signal of input is amplified to the control of+3V-15V signal, specially metal-oxide-semiconductor T2, resistance R20, resistance R21, resistance by circuit
+ 1V-+5V signal is carried out Linear Amplifer, metal-oxide-semiconductor T3, resistance R22, resistance R24, resistance by R23, triode Q9, diode D3
0-+0.9V signal is carried out Linear Amplifer by R27, triode Q7, voltage-stabiliser tube Z1, is most put afterwards through triode Q6, triode Q7 output
+ 3V-15V signal after big, feedback arrives the input terminal of photoelectrical coupler U1 later, changes the voltage of input terminal and then changes output
The voltage at end, and then the CE junction voltage of triode Q5 is controlled, most afterwards through diode D4, D5 series connection clipping after+3V-15V
To rear class circuit transmission, different degrees of amplification can be carried out according to network signal intensity, it is unstable to avoid output signal strength
And the problem that cannot be detected, including resistance R33, resistance R33 one end connection resistance R14 the other end, resistance R33's is another
End is separately connected the emitter point of the collector of triode Q3, the collector of triode Q4, one end of resistance R17, triode Q3
Not Lian Jie one end of resistance R18, resistance R19 one end, the base stage of the other end connecting triode Q5 of resistance R18, resistance R19's
The other end is separately connected, the collector of triode Q5, one end of resistance R21, the anode of diode D4, diode D5 cathode,
The cathode of anode the connection power supply+3V, diode D5 of diode D5 connect power supply+15V, and the other end of resistance R21 is separately connected
The grid of metal-oxide-semiconductor T2, the anode of diode D3, one end of resistance R22, the cathode of voltage-stabiliser tube Z1, metal-oxide-semiconductor T3 grid, metal-oxide-semiconductor
The drain electrode of T2 connects power supply+15V, the cathode connecting triode Q9 of diode D3 by resistance R20 with the collector of triode Q6
Collector, one end of the emitter connection resistance R23 of triode Q9, the other end of resistance R23 is separately connected triode Q6's
Base stage, the base stage of triode Q9, metal-oxide-semiconductor T2 source electrode, the collector of the drain electrode of metal-oxide-semiconductor T3 and triode Q8 passes through resistance R27
Power supply+3V is connected, the emitter of the collector of the positive connecting triode Q7 of voltage-stabiliser tube Z1, triode Q7 connects resistance R24's
One end, triode Q8 base stage, the other end of resistance R24 is separately connected the source electrode of the base stage of triode Q7, metal-oxide-semiconductor T3, three poles
One end of the emitter connection resistance R25 of pipe Q6, one end of the emitter connection resistance R26 of triode Q7, resistance R25's is another
End is separately connected the pin 1 of the other end of resistance R26, photoelectrical coupler U1, and the pin 2 of photoelectrical coupler U1 connects ground, photoelectricity
The pin 4 of coupler U1 is separately connected the emitter of the other end of resistance R17, the base stage of triode Q4, triode Q5, triode
The base stage of the emitter connecting triode Q3 of Q4, the collector of the 3 connecting triode Q5 of pin of photoelectrical coupler U1；
The differential height for receiving circuit and being formed using operational amplifier AR1, AR2, resistance R1- resistance R5, inductance L1, capacitor C1
Input impedance difference amplifier receives computer network signal input part signal, to obtain maximum (namely maximum journey as far as possible
The acquisition of degree) computer network signal network signal, wherein resistance R1- electricity is arranged in operational amplifier AR1, resistance R1- resistance R3(
It is equal to hinder R3 resistance value) composition follower, computer network signal net is received using the low feature of its input impedance high output impedance
The input anode of network signal is added to the non-inverting input terminal of operational amplifier AR2, computer network signal network letter through resistance R4
Number input cathode the inverting input terminal of operational amplifier AR2, operational amplifier AR2 are input to after inductance L1 smothing filtering
It is exported after carrying out subtraction to two input signals for subtracter, wherein capacitor C1 connects two input terminals in operational amplifier AR2
Between, play anti-crosstalk, including resistance R1, inductance L1, one end of resistance R1 and one end of inductance L1 are separately connected network
The anode and cathode of signal input part, the non-inverting input terminal of the other end connection operational amplifier AR1 of resistance R1, operational amplifier
The inverting input terminal of AR1 is separately connected one end of one end of ground resistance R2, resistance R3, and the other end of resistance R3 is separately connected fortune
Calculate one end of the output end of amplifier AR1, resistance R4, the other end of resistance R4 is separately connected one end of capacitor C1, resistance R5
One end, operational amplifier AR2 non-inverting input terminal, the other end of inductance L1 is separately connected the other end of capacitor C1, operation amplifier
The inverting input terminal of device AR2, the output end of the other end connection operational amplifier AR2 of resistance R5；
The emitter following output circuit receives the signal of complementary feedback modulation circuit output, passes through resistance R28, resistance R31, three
The emitter follower of pole pipe Q9 composition reduces output impedance, the T-type filter of voltage-stabiliser tube Z2 pressure stabilizing, inductance L2, L3 and capacitor C4 composition
Wave circuit is output to computer network signal output end after further filtering, concatenated resistance R32 and capacitor C5 will believe after filtering
Number feedback arrives the emitter of triode Q9, plays the role of stable quiescent point, including resistance R28, one end of resistance R28 connects
The other end of connecting resistance R19, the other end of resistance R28 are separately connected one end of resistance R29, one end of resistance R30, triode Q9
Base stage, the collector of triode Q9 connects power supply+20V with the other end of resistance R29, and the emitter of triode Q9 is separately connected
One end of resistance R31, the cathode of voltage-stabiliser tube Z2, inductance L2 one end, the other end of inductance L2 be separately connected capacitor C4 one end,
One end of inductance L3, the other end of inductance L3 are the output plus terminal of network signal, and the other end of inductance L3 is also connected with resistance R22's
One end, one end of the other end connection capacitor C5 of resistance R22, the emitter of the other end connecting triode Q9 of capacitor C5, resistance
The other end of R30, the other end of resistance R31, the anode of voltage-stabiliser tube Z2, capacitor C4 the other end link together, capacitor C4's
The other end is the output plus terminal of network signal.
When the present invention is specifically used, differential reception circuit uses operational amplifier AR1, AR2, resistance R1- resistance R5, inductance
The high input impedance difference amplifier of L1, capacitor C1 composition receives computer network signal input part signal, maximum to obtain
(namely obtaining to the greatest extent as far as possible) computer network signal network signal, enters low noise pre-amplification circuit later, leads to
Cross the low noise amplification electricity of metal-oxide-semiconductor T1, resistance R6, resistance R7, resistance R12- resistance R14 and potentiometer RW1, capacitor C2, C3 composition
Road carries out preposition amplification, and amplified signal is added to the base stage of triode Q1, Q2, the signal higher than+5V after potentiometer RW1 sampling
It is added to the emitter junction of triode Q1, triode Q1 conducting, for the signal of+5V to rear class circuit transmission, the signal lower than 0V is added to three
The emitter junction of pole pipe Q2, triode Q2 conducting, the signal of 0V play the role of correcting abnormal signal to rear class circuit transmission, and
By acquiring by the amplified signal before and after resistance R14, it is added to the non-inverting input terminal and anti-phase input of operational amplifier AR3
End, when the fluctuation of signal forward direction is big after comparing, diode D2 conducting, signal negative-feedback to the source electrode of metal-oxide-semiconductor T1 reduces the width of fluctuation
Degree, when negative sense fluctuation is big, diode D1 conducting, the positive and negative grid for being fed to metal-oxide-semiconductor T1 of signal reduces the amplitude of fluctuation, to guarantee
The stability of low noise amplification, output meets the 0-5V signal of signal amplitude requirement, controllable through complementary feedback modulation circuit again later
Linear Amplifer carries out controllable pressure stabilizing with the voltage regulator circuit of triode Q3, Q4, Q5, resistance R17- resistance R18 composition, in conjunction with MOS
The 0-5V signal of input is switched to stable+3V- by the complementary circuit that pipe T2, triode Q6 and metal-oxide-semiconductor T3, triode Q8 are formed
15V signal, wherein triode Q3, Q4 is compound adjustment pipe, is less than 0.3V when the CE for being added to triode Q5 ties signal intensity amplitude
When, the CE junction voltage of triode Q5 is also fluctuated in 0.3V range, and compound adjustment pipe BE junction voltage is basically unchanged, and output voltage is not
Become, when being greater than 0.3V, the size of the CE junction voltage of triode Q5 causes compound adjustment pipe BE junction voltage with variation, and output is stablized
+ the 3V-+15V of variation, and the CE junction voltage of triode Q5 is made of metal-oxide-semiconductor T2, triode Q6 and metal-oxide-semiconductor T3, triode Q8
Complementary circuit by the 0-5V signal of input be amplified to+3V-15V signal control, specially metal-oxide-semiconductor T2, resistance R20, resistance R21,
Resistance R23, triode Q9, diode D3 by+1V-+5V signal carry out Linear Amplifer, metal-oxide-semiconductor T3, resistance R22, resistance R24,
0-+0.9V signal is carried out Linear Amplifer by resistance R27, triode Q7, voltage-stabiliser tube Z1, most defeated through triode Q6, triode Q7 afterwards
Amplified+3V-15V signal out, feedback arrives the input terminal of photoelectrical coupler U1 later, changes the voltage of input terminal and then changes
The voltage of output end, and then control the CE junction voltage of triode Q5, most afterwards through diode D4, D5 series connection clipping in+3V-15V,
Signal is finally by emitter following output circuit after clipping, emitter following reduce output impedance, voltage-stabiliser tube pressure stabilizing, filter circuit into
Computer network signal output end is output to after the filtering of one step.
Claims (4)
1. a kind of computer network signal transmits amplifying circuit, which is characterized in that including differential reception circuit, the preposition amplification of low noise
Circuit, complementary feedback modulation circuit, emitter following output circuit, the differential reception circuit use operational amplifier AR1, AR2
High input impedance difference amplifier for core composition receives computer network signal input part signal, to obtain maximum calculating
Machine network signal network signal, later enter low noise pre-amplification circuit, by metal-oxide-semiconductor T1 be core low-noise amplification circuit into
Row is preposition to be amplified by a small margin, and passes through signal of the triode Q1 and triode Q2 amendment higher than+5V or the signal lower than 0V, operation
Amplifier AR3 is by output signal positive feedback or negative-feedback, and to guarantee the stability of amplification, the complementary feedback modulation circuit is received
Low noise pre-amplification circuit output signal, voltage regulator circuit combination metal-oxide-semiconductor T2, the triode Q6 formed with triode Q3, Q4, Q5
The 0-5V signal of input is switched to stable+3V-15V signal with the complementary circuit of metal-oxide-semiconductor T3, triode Q8 composition, realizes line
Property controllably amplify, most reduce output impedance, voltage-stabiliser tube pressure stabilizing, filter circuit into one through emitter following output circuit emitter following afterwards
Computer network signal output end is output to after step filtering.
2. a kind of computer network signal transmits amplifying circuit as described in claim 1, which is characterized in that put before the low noise
Big circuit includes resistance R6, and one end of resistance R6 connects the output end of operational amplifier AR2, and the other end of resistance R6 is separately connected
One end of ground resistance R7, one end of ground capacity C2, one end of resistance R13, metal-oxide-semiconductor T1 grid, the source electrode of metal-oxide-semiconductor T1 point
Not Lian Jie one end of ground resistance R12, ground capacity C3 one end, the drain electrode of metal-oxide-semiconductor T1 be separately connected one end of resistance R14,
The lower end of potentiometer RW1, resistance R9 one end, the other end of resistance R13, the upper end of potentiometer RW1, triode Q1 collector
Be all connected with power supply+5V, adjustable end connection one end of resistance R15 of potentiometer RW1, one end of resistance R16, triode Q1 base
Pole, the base stage of the other end connecting triode Q2 of resistance R16, the collector of triode Q2 connect ground, the other end point of resistance R14
Not Lian Jie one end of resistance R10, capacitor C6 one end, emitter, the triode Q2 of the other end connecting triode Q1 of capacitor C6
Emitter, the other end of resistance R10 is separately connected one end of the inverting input terminal of operational amplifier AR3, resistance R11, resistance
The other end of R9 is separately connected one end of the non-inverting input terminal of operational amplifier AR3, ground resistance R8, operational amplifier AR3's
Output end is separately connected the anode of the other end of resistance R11, the cathode of diode D1, diode D2, and the anode of diode D1 is even
Connect the grid of metal-oxide-semiconductor T1, the source electrode of the cathode connection metal-oxide-semiconductor T1 of diode D2.
3. a kind of computer network signal transmits amplifying circuit as described in claim 1, which is characterized in that the complementary feedback tune
Width circuit includes resistance R33, and one end of resistance R33 connects the other end of resistance R14, and the other end of resistance R33 is separately connected three
The collector of pole pipe Q3, the collector of triode Q4, one end of resistance R17, triode Q3 emitter be separately connected resistance R18
One end, resistance R19 one end, the base stage of the other end connecting triode Q5 of resistance R18, the other end of resistance R19 connects respectively
Connect, the collector of triode Q5, one end of resistance R21, the anode of diode D4, diode D5 cathode, diode D5 is just
Pole connects power supply+3V, and the cathode of diode D5 connects power supply+15V, and the other end of resistance R21 is separately connected the grid of metal-oxide-semiconductor T2
Pole, the anode of diode D3, one end of resistance R22, the cathode of voltage-stabiliser tube Z1, metal-oxide-semiconductor T3 grid, the drain electrode of metal-oxide-semiconductor T2 and
The collector of triode Q6 is by the collector of the cathode connecting triode Q9 of resistance R20 connection power supply+15V, diode D3, and three
One end of the emitter connection resistance R23 of pole pipe Q9, the other end of resistance R23 are separately connected the base stage of triode Q6, triode
The source electrode of the base stage of Q9, metal-oxide-semiconductor T2, the drain electrode of metal-oxide-semiconductor T3 and the collector of triode Q8 by resistance R27 connect power supply+
The collector of the positive connecting triode Q7 of 3V, voltage-stabiliser tube Z1, one end, three poles of the emitter connection resistance R24 of triode Q7
The base stage of pipe Q8, the other end of resistance R24 are separately connected the source electrode of the base stage of triode Q7, metal-oxide-semiconductor T3, the transmitting of triode Q6
Pole connects one end of resistance R25, one end of the emitter connection resistance R26 of triode Q7, and the other end of resistance R25 is separately connected
The pin 2 of the pin 1 of the other end of resistance R26, photoelectrical coupler U1, photoelectrical coupler U1 connects ground, photoelectrical coupler U1's
Pin 4 is separately connected the emitter of the other end of resistance R17, the base stage of triode Q4, triode Q5, the emitter of triode Q4
The base stage of connecting triode Q3, the collector of the 3 connecting triode Q5 of pin of photoelectrical coupler U1.
4. a kind of computer network signal transmits amplifying circuit as described in claim 1, which is characterized in that the differential reception electricity
Road includes resistance R1, inductance L1, one end of resistance R1 and one end of inductance L1 be separately connected network signal input terminal anode and
Cathode, the non-inverting input terminal of the other end connection operational amplifier AR1 of resistance R1, the inverting input terminal point of operational amplifier AR1
Not Lian Jie one end of ground resistance R2, resistance R3 one end, the other end of resistance R3 is separately connected the output of operational amplifier AR1
It holds, one end of resistance R4, the other end of resistance R4 is separately connected one end of capacitor C1, one end of resistance R5, operational amplifier AR2
Inverting input terminal, the other end of inductance L1 is separately connected the non-inverting input terminal of the other end of capacitor C1, operational amplifier AR2,
The output end of the other end connection operational amplifier AR2 of resistance R5；
The emitter following output circuit includes resistance R28, the other end of one end connection resistance R19 of resistance R28, resistance R28
The other end be separately connected one end of resistance R29, one end of resistance R30, triode Q9 base stage, the collector of triode Q9 and
The other end of resistance R29 connects power supply+20V, and the emitter of triode Q9 is separately connected one end of resistance R31, voltage-stabiliser tube Z2
One end of cathode, inductance L2, the other end of inductance L2 are separately connected one end of one end of capacitor C4, inductance L3, and inductance L3's is another
One end is the output plus terminal of network signal, and the other end of inductance L3 is also connected with one end of resistance R22, and the other end of resistance R22 connects
Connect one end of capacitor C5, the emitter of the other end connecting triode Q9 of capacitor C5, the other end of resistance R30, resistance R31 it is another
One end, the anode of voltage-stabiliser tube Z2, capacitor C4 the other end link together, the other end of capacitor C4 be the output of network signal just
End.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111432536A (en) * | 2020-03-14 | 2020-07-17 | 上海创容电子有限公司 | Signal processing system for energy-saving lighting device |
| CN112564640A (en) * | 2020-11-24 | 2021-03-26 | 中国电子科技集团公司第十三研究所 | Negative feedback type amplifier |
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2019
- 2019-08-30 CN CN201910815674.XA patent/CN110504931A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111432536A (en) * | 2020-03-14 | 2020-07-17 | 上海创容电子有限公司 | Signal processing system for energy-saving lighting device |
| CN111432536B (en) * | 2020-03-14 | 2022-03-01 | 上海创容电子有限公司 | Signal processing system for energy-saving lighting device |
| CN112564640A (en) * | 2020-11-24 | 2021-03-26 | 中国电子科技集团公司第十三研究所 | Negative feedback type amplifier |
| CN112564640B (en) * | 2020-11-24 | 2023-04-25 | 中国电子科技集团公司第十三研究所 | Negative feedback type amplifier |
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Application publication date: 20191126 |
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