CN111431546A - Digital microwave signal anti-distortion circuit - Google Patents
Digital microwave signal anti-distortion circuit Download PDFInfo
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- CN111431546A CN111431546A CN202010428301.XA CN202010428301A CN111431546A CN 111431546 A CN111431546 A CN 111431546A CN 202010428301 A CN202010428301 A CN 202010428301A CN 111431546 A CN111431546 A CN 111431546A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04B1/0475—Circuits with means for limiting noise, interference or distortion
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Abstract
The invention discloses a digital microwave signal anti-distortion circuit, which comprises a signal sampling module and a frequency modulation detection module, wherein the signal sampling module uses a signal sampler J1 with the model of DAM-3056AH to sample a signal at a signal transmitting end in a digital microwave system, the frequency modulation detection module firstly uses an operational amplifier AR1, a diode D2 and a diode D3 to form a detection circuit to screen peak signals, and simultaneously divides the detection circuit into two paths for signal adjustment, one path uses an inductor L4, a capacitor C1 and a capacitor C3 to form a frequency modulation circuit to adjust the signal frequency, the other path uses an operational amplifier AR2, an operational amplifier AR4 and a capacitor C4 to form a buffer voltage stabilizing circuit to stabilize the signal waveform, uses a limiting circuit formed by the diode D4 and the diode D5 to limit the signal potential and then adjusts the output signal potential of the operational amplifier AR5, and finally uses the operational amplifier AR5 to buffer the signal and then sends the signal to a digital microwave system terminal through a signal transmitter E1, so.
Description
Technical Field
The invention relates to the technical field of microwaves, in particular to a digital microwave signal anti-distortion circuit.
Background
Digital microwave is used as a transmission mode of a communication network, can form the whole communication transmission network together with other transmission modes, in order to transmit multi-channel signals on a microwave line at the same time, a digital microwave system usually adopts a time division multiplexing technology as a multiplexing technology, multiplexing levels in the digital microwave system are subjected to step-by-step multiplexing according to the levels defined by PDH, and channels of a microwave control system of the time division multiplexing technology are interconnected and act.
Disclosure of Invention
In view of the above situation, an object of the present invention is to provide an anti-distortion circuit for digital microwave signals, which can sample and adjust node signals in a digital microwave control system and convert the node signals into reference analysis signals of a digital microwave system terminal.
The technical scheme includes that the digital microwave signal anti-distortion circuit comprises a signal sampling module and a frequency modulation detection module, wherein the signal sampling module uses a signal sampler J1 with the model of DAM-3056AH to sample a signal at a signal transmitting end in a digital microwave system, the frequency modulation detection module firstly uses an operational amplifier AR1, a diode D2 and a diode D3 to form a detection circuit to screen peak signals, and simultaneously divides the detection circuit into two paths for signal adjustment, one path uses an inductor L, a capacitor C1 and a capacitor C3 to form a frequency modulation circuit to adjust signal frequency, the other path uses an operational amplifier AR2, an operational amplifier AR4 and a capacitor C4 to form a buffer voltage stabilizing circuit to stabilize signal waveforms, uses a thyristor Q5 to detect an output signal of the operational amplifier AR2 and a signal potential difference of an emitter of a triode Q1, high-level signals pass through the triode Q2 and a triode Q3 to form a push-pull circuit for adjustment, and uses a diode D4 and a diode D5 to form a circuit to limit signal potential and then adjust the output signal potential of the operational amplifier AR5, and finally uses the signal buffer 5 to be sent;
the frequency modulation detection module comprises an operational amplifier AR, the in-phase input end of the operational amplifier AR is connected with the anode of a diode D, one end of a resistor R, the reverse phase input end of the operational amplifier AR is connected with one end of the resistor R, the other end of the resistor R is grounded, the output end of the operational amplifier AR is connected with the cathode of the diode D, the anode of the diode D, the cathode of the diode D is connected with the other end of the resistor R and the resistor R, one end of a capacitor C and one end of a capacitor C, the other end of the capacitor C is connected with one end of an inductor 4, the other end of the capacitor C is connected with one end of an emitter of a triode Q, the drain of a controlled silicon Q and the emitter of a triode Q, the base of the triode Q is connected with the inductor 4 and the other end of the capacitor C, the collector of the triode Q is connected with a power supply +5V, the other end of the resistor R is connected with the in-phase input end of the operational amplifier AR and one end of the capacitor C, the other end of the operational amplifier AR is connected with one end of the emitter of the resistor R, the emitter of the operational amplifier AR and the emitter of the resistor Q, the emitter of the triode Q are connected with the collector of the transistor Q, the emitter of the operational amplifier, the transistor Q, the emitter of the transistor Q, the transistor Q is connected with the emitter of the transistor Q, the emitter of the transistor Q.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages;
1. the operational amplifier AR1, the diode D2 and the diode D3 are used for forming a detection circuit to screen peak signals, the diode D2 and the diode D3 are used for unidirectional conduction to limit low-level signals, namely, screening peak signals, for next adjustment pretreatment, the method is divided into two paths of signal adjustment at the same time, one path of signal adjustment is formed by the inductor L4 and the capacitor C1-C3 to form a frequency modulation circuit to adjust signal frequency, the capacitor C2 and the capacitor C3 filter low-frequency components of signals, the inductor L4 filters high-frequency components of signals, meanwhile, the triode Q1 and the capacitor C2 are used for charging and discharging, the time of the emitter of the triode Q1 is delayed, namely, under the condition that the phase is unchanged, the signal output signal is changed, and the effect of adjusting the signal;
2. the operational amplifier AR2, the operational amplifier AR4 and the capacitor C4 are used to form a buffer voltage stabilizing circuit to stabilize the signal waveform, and the thyristor Q5 is used for detecting the potential difference between the output signal of the operational amplifier AR2 and the emitter signal of the triode Q1, detecting whether the signal of the inverting input end of the operational amplifier AR5 needs fine adjustment, when the signal contains high level peak signal, the silicon controlled rectifier Q5 is triggered to conduct, the high level signal is conducted and forms a push-pull circuit through the triode Q2 and the triode Q3 for regulation, the push-pull circuit inhibits the interference of common mode signal, ensures the stability of fine tuning signal, meanwhile, the diode D4 and the diode D5 are used for forming an amplitude limiting circuit to limit the signal potential, then the output signal potential of the operational amplifier AR5 is adjusted, the amplitude limiting circuit plays a role of a protection circuit, finally the operational amplifier AR5 is used for buffering signals and then the signals are sent to the digital microwave system terminal through the signal transmitter E1, and the digital microwave system terminal receives signals and adjusts and corrects the signals of the signal transmitting end in time.
Drawings
Fig. 1 is a schematic circuit diagram of an anti-distortion circuit for digital microwave signals according to the present invention.
Fig. 2 is a block diagram of a frequency modulation detection circuit of the digital microwave signal anti-distortion circuit of the present invention.
Detailed Description
The foregoing and other aspects, features and advantages of the invention will be apparent from the following more particular description of embodiments of the invention, as illustrated in the accompanying drawings in which reference is made to figures 1-2. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
The signal sampling module samples a signal at a signal transmitting end in a digital microwave system by using a signal sampler J1 with the model of DAM-3056AH, the FM detection module firstly uses an operational amplifier AR1, a diode D2 and a diode D3 to form a detection circuit to screen peak signals and simultaneously divides the peak signals into two paths for signal adjustment, one path uses an inductor L, a capacitor C1 and a capacitor C3 to form frequency modulation circuit adjustment signal frequency, the other path uses an operational amplifier AR2, an operational amplifier AR4 and a capacitor C4 to form a buffer voltage stabilizing circuit to stabilize signal waveforms, a thyristor Q5 is used to detect an output signal of the operational amplifier AR2 and a signal potential difference of an emitter of a triode Q1, a high-level signal is guided through a triode Q2 and a triode Q3 to form a buffer circuit adjustment, and simultaneously a diode D7378 and a diode 686D 6 are used to form a buffer circuit limiting signal potential and then adjust the output signal potential of the operational amplifier AR5, and finally the signal potential is sent to a terminal of an AR1 transmitter through an AR 7378 and a buffer circuit;
the frequency modulation detection module firstly uses an operational amplifier AR1, a diode D2 and a diode D3 to form a detection circuit to screen peak signals, uses the unidirectional conduction of a diode D2 and a diode D3 to limit low-level signals, namely, to screen peak signals, and is used for next adjustment pretreatment, and is simultaneously divided into two paths of signal adjustment, one path uses an inductor L, a capacitor C1 and a capacitor C3 to form a frequency modulation circuit to adjust signal frequency, the capacitor C2 and the capacitor C3 filter low-frequency components of signals, the inductor L filters high-frequency components of signals, and simultaneously uses the charging and discharging of a triode Q1 and a capacitor C2 to delay the signal output time of an emitter of the triode Q2, namely, under the condition that the phase is not changed, the signal output signal is changed to play a role in adjusting signal frequency, two paths use the operational amplifier AR2, the operational amplifier AR2 and the capacitor C2 to form a buffer stable signal waveform of signals, and uses the SCR Q2 to detect the potential difference between the output signal of the operational amplifier AR 72 and an emitter of the triode Q72 and a signal emitter of a high-adjustable digital signal after the phase of the operational amplifier is changed, the operational amplifier is used for detecting whether the operational amplifier, the operational amplifier AR 72, the operational amplifier needs to adjust the phase-inverted signal, the peak signal is used for the terminal, the terminal of the operational amplifier, the operational amplifier is used for triggering a high-adjustable digital signal of the gain circuit, the gain circuit;
the frequency modulation detection module is characterized in that the in-phase input end of the operational amplifier AR is connected with the anode of a diode D, one end of a resistor R, the reverse phase input end of the operational amplifier AR is connected with one end of the resistor R, the other end of the resistor R is grounded, the output end of the operational amplifier AR is connected with the cathode of the diode D, the cathode of the diode D is connected with the other end of the resistor R and one end of a capacitor C, the other end of the capacitor C is connected with one end of an inductor 4, the other end of the capacitor C is connected with one end of a capacitor C and the emitter of a triode Q, the drain of the thyristor Q and the emitter of the triode Q, the base of the triode Q is connected with the inductor 4 and the other end of the capacitor C, the collector of the triode Q is connected with a power supply +5V, the other end of the resistor R is connected with the in-phase input end of the operational amplifier AR and one end of the capacitor C, the other end of the reverse phase input end of the resistor R and one end of the emitter of the resistor R, the operational amplifier AR is connected with the grid of the operational amplifier Q, the base of the transistor Q and the emitter of the triode Q, the collector of the operational amplifier are connected with the emitter of the triode Q, the emitter of the transistor Q, the collector of the transistor Q and the emitter of the transistor Q, the emitter of the transistor Q are connected with the emitter of the transistor Q, the emitter of the.
On the basis of the scheme, the signal sampling module selects a DAM-3056AH signal sampler J1 to sample a signal at a signal transmitting end in a digital microwave system, a power supply end of a signal sampler J1 is connected with +5V, a grounding end of the signal sampler J1 is grounded, an output end of the signal sampler J1 is connected with a negative electrode of a voltage regulator tube D1 and one end of a resistor R1, a positive electrode of a voltage regulator tube D1 is grounded, and the other end of the resistor R1 is connected with a non-inverting input end of a carrier AR 1.
When the digital microwave signal anti-distortion circuit is used, the digital microwave signal anti-distortion circuit comprises a signal sampling module and a frequency modulation detection module, wherein the signal sampling module uses a signal sampler J1 with the model of DAM-3056AH to sample a signal at a signal transmitting end in a digital microwave system, the frequency modulation detection module firstly uses an operational amplifier AR1, a diode D2 and a diode D3 to form a detection circuit to screen peak signals, uses the unidirectional conduction of a diode D2 and a diode D3 to limit low-level signals, namely, screen peak signals, and is used for next adjustment preprocessing, and is divided into two paths of signal adjustment, one path uses an inductor L, a capacitor C1 and a capacitor C3 to form a frequency modulation circuit to adjust the signal frequency, the capacitor C2 and the capacitor C2 to filter low-frequency components, the inductor 2 to filter high-frequency components of signals, simultaneously uses the charge and discharge of a triode Q2 and a capacitor C2 to delay the emitter of the triode Q2 and the triode Q2 to delay the emitter of the triode Q2 to output signal, namely, the emitter of the triode Q2 and the emitter of the AR circuit to delay the triode Q2, and the triode Q2, the triode is used for stably outputting signals, and the emitter of a triode 2, and a triode 2 to detect whether the peak signal buffering circuit after the triode 2 is connected with a stable signal, the triode 2, and a triode 2, the emitter 2, the triode is connected signal is connected, and a triode 2, the triode 2, and a triode 2, the triode 2 is connected circuit is connected with a triode 2, the triode 2, and a triode 2, the triode is used for stably connected circuit, the.
While the invention has been described in further detail with reference to specific embodiments thereof, it is not intended that the invention be limited to the specific embodiments thereof; for those skilled in the art to which the present invention pertains and related technologies, the extension, operation method and data replacement should fall within the protection scope of the present invention based on the technical solution of the present invention.
Claims (2)
1. A digital microwave signal distortion prevention circuit comprises a signal sampling module and a frequency modulation detection module, and is characterized in that the signal sampling module samples a signal at a signal transmitting end in a digital microwave system by using a signal sampler J1 with the model of DAM-3056AH, the frequency modulation detection module firstly uses an operational amplifier AR1, a diode D2 and a diode D3 to form a detection circuit to screen peak signals, and simultaneously divides the peak signals into two paths for signal adjustment, one path uses an inductor L, a capacitor C1 and a capacitor C3 to form frequency modulation circuit adjustment signal frequency, the other path uses an operational amplifier AR2, an operational amplifier AR4 and a capacitor C4 to form a buffer voltage stabilizing circuit to stabilize signal waveforms, uses a thyristor Q5 to detect an output signal of the operational amplifier AR2 and a signal potential difference of an emitter of a triode Q1, a high-level signal is guided through a triode Q2 and a triode Q3 to form a buffer circuit adjustment, and simultaneously uses a diode D7378 and a diode 686D 6 to form a limiter circuit to limit signal potential and then adjust the output signal potential after the signal potential, and finally, the signal is sent to a transmitter 5 to a;
the frequency modulation detection module comprises an operational amplifier AR, the in-phase input end of the operational amplifier AR is connected with the anode of a diode D, one end of a resistor R, the reverse phase input end of the operational amplifier AR is connected with one end of the resistor R, the other end of the resistor R is grounded, the output end of the operational amplifier AR is connected with the cathode of the diode D, the anode of the diode D, the cathode of the diode D is connected with the other end of the resistor R and the resistor R, one end of a capacitor C and one end of a capacitor C, the other end of the capacitor C is connected with one end of an inductor 4, the other end of the capacitor C is connected with one end of an emitter of a triode Q, the drain of a controlled silicon Q and the emitter of a triode Q, the base of the triode Q is connected with the inductor 4 and the other end of the capacitor C, the collector of the triode Q is connected with a power supply +5V, the other end of the resistor R is connected with the in-phase input end of the operational amplifier AR and one end of the capacitor C, the other end of the operational amplifier AR is connected with one end of the emitter of the resistor R, the emitter of the operational amplifier AR and the emitter of the resistor Q, the emitter of the triode Q are connected with the collector of the transistor Q, the emitter of the operational amplifier, the transistor Q, the emitter of the transistor Q, the transistor Q is connected with the emitter of the transistor Q, the emitter of the transistor Q.
2. The digital microwave signal distortion prevention circuit as claimed in claim 1, wherein the signal sampling module comprises a signal sampler J1 with model number DAM-3056AH, a power supply end of a signal sampler J1 is connected with +5V, a ground end of the signal sampler J1 is connected with ground, an output end of the signal sampler J1 is connected with a negative electrode of a voltage regulator D1 and one end of a resistor R1, an anode of the voltage regulator D1 is connected with ground, and the other end of the resistor R1 is connected with a non-inverting input end of a carrier AR 1.
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| CN202010428301.XA CN111431546B (en) | 2020-05-20 | 2020-05-20 | Digital microwave signal anti-distortion circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111859459A (en) * | 2020-07-31 | 2020-10-30 | 唐有钢 | Block chain data security management platform |
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| CN111082818A (en) * | 2020-01-09 | 2020-04-28 | 南阳理工学院 | Internet carrier signal regulating circuit |
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2020
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109849681A (en) * | 2019-03-30 | 2019-06-07 | 郝蕾 | The torque signal compensation circuit of the four-wheel drive system of electric car |
| CN110233633A (en) * | 2019-06-18 | 2019-09-13 | 郑州工程技术学院 | A kind of data transfer of computer system based on Internet of Things |
| CN111049551A (en) * | 2019-12-31 | 2020-04-21 | 郑州航空工业管理学院 | Anti-interference transmission device of network signal |
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