CN220440571U - High-precision voltage feedback circuit for base station rectifying module - Google Patents
High-precision voltage feedback circuit for base station rectifying module Download PDFInfo
- Publication number
- CN220440571U CN220440571U CN202320967553.9U CN202320967553U CN220440571U CN 220440571 U CN220440571 U CN 220440571U CN 202320967553 U CN202320967553 U CN 202320967553U CN 220440571 U CN220440571 U CN 220440571U
- Authority
- CN
- China
- Prior art keywords
- resistor
- circuit
- operational amplifier
- input end
- capacitor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000002955 isolation Methods 0.000 claims abstract description 35
- 230000005540 biological transmission Effects 0.000 claims abstract description 32
- 230000003287 optical effect Effects 0.000 claims abstract description 14
- 230000003321 amplification Effects 0.000 claims abstract description 12
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 12
- 230000008878 coupling Effects 0.000 claims abstract description 4
- 238000010168 coupling process Methods 0.000 claims abstract description 4
- 238000005859 coupling reaction Methods 0.000 claims abstract description 4
- 239000003990 capacitor Substances 0.000 claims description 103
- 238000006243 chemical reaction Methods 0.000 claims description 35
- 101000932768 Conus catus Alpha-conotoxin CIC Proteins 0.000 claims description 2
- 230000010354 integration Effects 0.000 claims 3
- 238000000034 method Methods 0.000 claims 1
- 230000004044 response Effects 0.000 abstract description 8
- 230000009286 beneficial effect Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 4
- 238000005070 sampling Methods 0.000 description 4
- 230000003750 conditioning effect Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Landscapes
- Amplifiers (AREA)
Abstract
The utility model relates to a high-precision voltage feedback circuit for a base station rectifying module, which comprises a front-stage signal amplifying circuit, a linear optical coupler isolation transmission circuit and a rear-stage signal arrangement circuit, wherein the input end of the front-stage signal amplifying circuit is connected with direct-current voltage, and the front-stage signal amplifying circuit, the linear optical coupler isolation transmission circuit and the rear-stage signal arrangement circuit are electrically connected in sequence. The direct-current voltage output by the switching power supply is subjected to differential amplification treatment through the front-stage signal amplifying circuit, so that the direct-current voltage can still be accurately controlled when the input voltage is low, the direct-current voltage is subjected to optical coupling isolation through the linear optical coupling isolation transmission circuit, signals output by the front-stage signal amplifying circuit are linearly transmitted to the rear-stage signal finishing circuit while cold and hot grounds are isolated, finally, the signals are subjected to signal treatment through the rear-stage signal finishing circuit, noise is eliminated, response speed is ensured, and finally, the signals are output to the digital signal processor for processing and driving PWM waveforms are generated, so that the performance of the rectifying module is remarkably improved, and the size of the rectifying module is greatly reduced.
Description
Technical Field
The utility model relates to the technical field of electronic circuits, in particular to a high-precision voltage feedback circuit for a base station rectifying module.
Background
The precision requirement of the communication power supply field on the direct current voltage-stabilizing output is higher and is generally within 5 per mill. A high precision voltage feedback circuit design is employed inside the rectifying module. The traditional voltage feedback circuit has poor anti-interference capability, linearity and response speed can not meet the requirements of a digital power supply, and becomes a short board for restricting the improvement of the performance of the switching power supply.
Disclosure of Invention
The technical problem to be solved by the utility model is to provide a high-precision voltage feedback circuit for a base station rectifying module aiming at the defects in the prior art.
The technical scheme for solving the technical problems is as follows: the high-precision voltage feedback circuit for the base station rectifying module comprises a front-stage signal amplifying circuit, a linear optocoupler isolation transmission circuit and a rear-stage signal arrangement circuit, wherein the input end of the front-stage signal amplifying circuit is connected with direct-current voltage, the output end of the front-stage signal amplifying circuit is electrically connected with the input end of the linear optocoupler isolation transmission circuit, and the output end of the linear optocoupler isolation transmission circuit is electrically connected with the input end of the rear-stage signal arrangement circuit.
The beneficial effects of the utility model are as follows: the high-precision voltage feedback circuit for the base station rectifying module provided by the utility model has the advantages that the direct-current voltage output by the switching power supply is subjected to differential amplification treatment through the front-stage signal amplifying circuit, so that the accurate control can be ensured when the input voltage is low, the linear optocoupler isolation transmission circuit is used for carrying out optocoupler isolation, the cold and hot ground is isolated, the signal output by the front-stage signal amplifying circuit is linearly transmitted to the rear-stage signal arranging circuit, the signal processing is carried out through the rear-stage signal arranging circuit, the noise is eliminated, the response speed is ensured, and the signal is finally output to the digital signal processor for processing and generating a driving PWM waveform, so that the performance of the rectifying module is obviously improved, and the size of the rectifying module is greatly reduced.
Based on the technical scheme, the utility model can also be improved as follows:
further: the front-stage signal amplifying circuit comprises a voltage dividing circuit and a differential amplifying circuit, wherein two input ends of the voltage dividing circuit are respectively and correspondingly and electrically connected with positive and negative output ends of external direct-current voltage, two output ends of the voltage dividing circuit are respectively and correspondingly and electrically connected with two input ends of the differential amplifying circuit, and the output end of the differential amplifying circuit is electrically connected with the input end of the linear optocoupler isolation transmission circuit.
The beneficial effects of the above-mentioned further scheme are: the voltage dividing circuit is arranged, so that the amplitude of an input signal is within the allowable range of the operational amplifier input, and the normal operation of a subsequent differential amplifying circuit is ensured.
Further: the differential amplifying circuit voltage dividing circuit comprises a resistor R1, a resistor R2, a resistor R3, a capacitor C1 and a capacitor C2, wherein the capacitor C1 is electrically connected between positive and negative output ends of external direct-current voltage, the resistor R1, the resistor R2 and the resistor R3 are sequentially connected in series between the positive output end and the negative output end of the external direct-current voltage, the common end of the resistor R2 and the resistor R3 is electrically connected with the positive input end of the differential amplifying circuit, and the negative output end of the external direct-current voltage is electrically connected with the negative input end of the differential amplifying circuit.
The beneficial effects of the above-mentioned further scheme are: the voltage dividing circuit is formed by the resistor R1, the resistor R2 and the resistor R3, so that the amplitude of an input signal is controlled, the voltage input to the differential amplifying circuit is ensured to be in an allowable range, and meanwhile, the capacitor C1 and the capacitor C2 play a role in filtering common mode and differential mode signal interference.
Further: the differential amplifying circuit comprises a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a capacitor C3, a capacitor C4 and an integrated operational amplifier U1.1, wherein the negative output end of external direct voltage is electrically connected with the inverting input end of the integrated operational amplifier U1.1 through the resistor R5, the inverting input end of the integrated operational amplifier U1.1 is connected with a power supply +2.5V through the resistor R4, the resistor R8 is electrically connected between the inverting input end and the output end of the integrated operational amplifier U1.1, the positive output end of the voltage dividing circuit is electrically connected with the non-inverting input end of the integrated operational amplifier U1.1 through the resistor R6, the non-inverting input end of the integrated operational amplifier U1.1 is connected with a power supply +2.5V through the resistor R9, the non-inverting input end of the integrated operational amplifier U1.1 is connected with a positive power supply +12V, and the non-inverting input end of the integrated operational amplifier U1.1.1 is connected with the input end of the integrated operational amplifier U1.1 in parallel, and the non-inverting input end of the integrated operational amplifier U1.1 is connected with the capacitor C1.1.
The beneficial effects of the above-mentioned further scheme are: the differential amplifying circuit is formed by the resistor R4, the resistor R5, the resistor R6, the resistor R7, the resistor R8, the resistor R9, the capacitor C3, the capacitor C4 and the integrated operational amplifier U1.1, so that the sampling voltage can be amplified for the first stage.
Further: the linear optocoupler isolation transmission circuit comprises an LED driving circuit and a conversion circuit for converting current into voltage, wherein the input end of the LED driving circuit is electrically connected with the output end of the front-stage signal amplification circuit, one output end of the LED driving circuit is electrically connected with one output end of the conversion circuit, and the other output end of the LED driving circuit is correspondingly and electrically connected with the input end of the conversion circuit.
The beneficial effects of the above-mentioned further scheme are: the LED driving circuit can generate a driving signal according to the signal output by the front-stage signal amplifying circuit and drive the converting circuit to convert the output current into voltage output.
Further: the LED driving circuit comprises a resistor R10, a resistor R11, a resistor R12, a capacitor C5, a triode Q1 and an integrated operational amplifier U1.2, wherein the output end of the front-stage signal amplifying circuit is electrically connected with the inverting input end of the integrated operational amplifier U1.2 through the resistor R10, the capacitor C5 is electrically connected between the inverting input end and the output end of the integrated operational amplifier U1.2, the non-inverting input end of the integrated operational amplifier U1.2 is grounded, the output end of the integrated operational amplifier U1.2 is electrically connected with the base electrode of the triode Q1 through the resistor R11, the collector electrode of the triode Q1 is grounded, and the emitter electrode of the triode Q1 is electrically connected with one input end of the conversion circuit, and the output end of the front-stage signal amplifying circuit is also electrically connected with one output end of the conversion circuit through the resistor R10.
The beneficial effects of the above-mentioned further scheme are: the gain of the optocoupler can be determined through the resistor R10, a driving circuit is formed through the resistor R11, the resistor R12, the capacitor C5, the triode Q1 and the integrated operational amplifier U1.2, and a driving signal is generated according to a signal output by the pre-stage signal amplifying circuit so as to drive the converting circuit to complete the conversion from current to voltage.
Further: the conversion circuit comprises an optocoupler U2, a resistor R13, a resistor R14, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9, a capacitor C10 and an integrated operational amplifier U4.1, wherein the power input end of the optocoupler U2 is connected with a power supply +12V, the grounding end of the optocoupler U2 is grounded, the input end of the optocoupler U2 is electrically connected with the emitting electrode of the triode Q1, one output end of the optocoupler U2 is electrically connected with the output end of the front-stage signal amplification circuit through the resistor R10, the positive electrode and the negative electrode of the other output end of the optocoupler U2 are respectively and correspondingly electrically connected with the non-inverting input end and the inverting input end of the integrated operational amplifier U4.1, the non-inverting input end of the integrated operational amplifier U4.1 is grounded, the capacitor C6 and the resistor R13 are connected in parallel between the inverting input end and the output end of the integrated operational amplifier U4.1, the positive power supply input end of the integrated operational amplifier U4.1 is connected with the power supply +5V, and the positive power supply input end of the integrated operational amplifier U4.1 is connected with the power supply +1V 6 and the inverting input end of the integrated operational amplifier U4.1 in parallel, and the positive electrode of the integrated operational amplifier U2 is connected with the input end of the capacitor C1 and the input end of the integrated operational amplifier U4.1 is connected with the input end of the capacitor C1 through the capacitor C7.
The beneficial effects of the above-mentioned further scheme are: and a conversion circuit is formed by the resistor R13, the resistor R14, the capacitor C6, the capacitor C7, the capacitor C8 and the integrated operational amplifier U4.1, and the current output by the optocoupler U2 is converted into voltage and is output to the post-stage signal arrangement circuit.
Further: the post-stage signal arrangement circuit comprises a resistor R18, a capacitor C14 and an integrating circuit, wherein the output end of the linear optocoupler isolation transmission circuit is electrically connected with the input end of the integrating circuit, the output end of the integrating circuit is electrically connected with a digital-to-analog conversion input end of an external DSP, the resistor R18 and the capacitor C14 are connected in series between the output end of the linear optocoupler isolation transmission circuit and the ground, and the common end of the resistor R18 and the capacitor C14 is electrically connected with the other digital-to-analog conversion input end of the external DSP.
The beneficial effects of the above-mentioned further scheme are: the voltage of the signal at the output end of the optical coupler U2 is converted through the integrating circuit and is output to a digital-to-analog conversion input end of an external DSP; the signal output by the optocoupler U2 is filtered through the resistor R18 and the capacitor C14 and then is sent to the other digital-to-analog conversion input end of the external DSP.
Further: the integrating circuit comprises a resistor R15, a resistor R16, a capacitor C11, a capacitor C12, an integrated operational amplifier U4.2 and an integrated operational amplifier U5.1, wherein the output end of the linear optical coupling isolation transmission circuit is electrically connected with the non-inverting input end of the integrated operational amplifier U4.2, the inverting input end of the integrated operational amplifier U4.2 is electrically connected with the output end, the resistor R15 and the capacitor C11 are connected in series between the output end of the integrated operational amplifier U4.2 and the ground, the resistor R16 and the capacitor C12 are connected in series between the common end of the resistor R15 and the capacitor C11 and the ground, the common end of the resistor R16 and the capacitor C12 are electrically connected with the non-inverting input end of the integrated operational amplifier U5.1, the inverting input end of the integrated operational amplifier U5.1 is connected with the output end of a power supply +5V, the source input end of the integrated operational amplifier U5.1 is connected with the power supply-5V, the common end of the resistor R16 and the capacitor C13 are connected in series between the output end of the integrated operational amplifier U5.1 and the ground, and the common end of the resistor C13 is connected in series between the output end of the integrated operational amplifier U.1 and the capacitor C13 and the output end of the integrated operational amplifier U.1.
The beneficial effects of the above-mentioned further scheme are: the resistor R15, the resistor R16, the capacitor C11, the capacitor C12, the integrated operational amplifier U4.2 and the integrated operational amplifier U5.1 form an integrating circuit, signals at the output end of the optocoupler U2 are subjected to voltage conversion and output to a digital-to-analog conversion input end of an external DSP, so that noise interference can be reduced, the precision is ensured, instantaneous signals are sampled, and the response speed is ensured.
Drawings
FIG. 1 is a schematic diagram of a high-precision voltage feedback circuit for a base station rectifier module according to an embodiment of the present utility model;
FIG. 2 is a schematic circuit diagram of a pre-stage signal amplifying circuit according to an embodiment of the present utility model;
FIG. 3 is a schematic circuit diagram of a linear optocoupler isolation transmission circuit according to an embodiment of the utility model;
fig. 4 is a circuit diagram of a post-stage signal conditioning circuit according to an embodiment of the present utility model.
Detailed Description
The principles and features of the present utility model are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the utility model and are not to be construed as limiting the scope of the utility model.
As shown in fig. 1, the high-precision voltage feedback circuit for the base station rectification module comprises a front-stage signal amplification circuit, a linear optical coupler isolation transmission circuit and a rear-stage signal arrangement circuit, wherein the input end of the front-stage signal amplification circuit is connected with direct-current voltage, the output end of the front-stage signal amplification circuit is electrically connected with the input end of the linear optical coupler isolation transmission circuit, and the output end of the linear optical coupler isolation transmission circuit is electrically connected with the input end of the rear-stage signal arrangement circuit.
The high-precision voltage feedback circuit for the base station rectifying module disclosed by the utility model has the advantages that the direct-current voltage output by the switching power supply is subjected to differential amplification treatment through the front-stage signal amplifying circuit, so that the accurate control can be ensured when the input voltage is lower, the linear optocoupler isolation transmission circuit is used for carrying out optocoupler isolation, the signal output by the front-stage signal amplifying circuit is linearly transmitted to the rear-stage signal arranging circuit while cold and hot grounds are isolated, finally, the signal processing is carried out through the rear-stage signal arranging circuit, the noise is eliminated, the response speed is ensured, the signal is finally output to the digital signal processor for processing and generating a driving PWM waveform, the isolated optocoupler is used for transmitting sampling signals, and the digital processor is used for compensating the sampling signals in real time, so that the performance of the rectifying module is obviously improved, and the volume of the rectifying module is greatly reduced.
In one or more embodiments of the present utility model, the pre-stage signal amplifying circuit includes a voltage dividing circuit and a differential amplifying circuit, two input ends of the voltage dividing circuit are respectively and correspondingly electrically connected with positive and negative output ends of an external direct current voltage, two output ends of the voltage dividing circuit are respectively and correspondingly electrically connected with two input ends of the differential amplifying circuit, and an output end of the differential amplifying circuit is electrically connected with an input end of the linear optocoupler isolation transmission circuit. The voltage dividing circuit is arranged, so that the amplitude of an input signal is within the allowable range of the operational amplifier input, and the normal operation of a subsequent differential amplifying circuit is ensured.
Specifically, as shown in fig. 2, in one or more embodiments of the present utility model, the voltage dividing circuit of the differential amplifying circuit includes a resistor R1, a resistor R2, a resistor R3, a capacitor C1 and a capacitor C2, where the capacitor C1 is electrically connected between positive and negative output ends of an external dc voltage, the resistor R1, the resistor R2 and the resistor R3 are sequentially connected in series between the positive output end and the negative output end of the external dc voltage, and a common end of the resistor R2 and the resistor R3 is electrically connected with the positive input end of the differential amplifying circuit, and the negative output end of the external dc voltage is electrically connected with the negative input end of the differential amplifying circuit. The voltage dividing circuit is formed by the resistor R1, the resistor R2 and the resistor R3, so that the amplitude of an input signal is controlled, the voltage input to the differential amplifying circuit is ensured to be in an allowable range, and meanwhile, the capacitor C1 and the capacitor C2 play a role in filtering common mode and differential mode signal interference.
Specifically, as shown in fig. 2, in one or more embodiments of the present utility model, the differential amplifying circuit includes a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a capacitor C3, a capacitor C4, and an integrated operational amplifier U1.1, the negative output terminal of the external direct voltage is electrically connected to the inverting input terminal of the integrated operational amplifier U1.1 through the resistor R5, the inverting input terminal of the integrated operational amplifier U1.1 is connected to a power +2.5v through the resistor R4, the inverting input terminal of the integrated operational amplifier U1.1 is electrically connected to the resistor R8, the positive output terminal of the voltage dividing circuit is electrically connected to the non-inverting input terminal of the integrated operational amplifier U1.1 through the resistor R6, the non-inverting input terminal of the integrated operational amplifier U1.1 is connected to a power +2.5v through the resistor R7, the non-inverting input terminal of the integrated operational amplifier U1.1 is connected to a ground through the resistor R9, and the inverting input terminal of the integrated operational amplifier U1.1 is connected to the positive input terminal of the integrated operational amplifier U1.1 is connected to the output terminal of the integrated operational amplifier U1.1, and the positive input terminal of the integrated operational amplifier is connected to the output terminal of the integrated operational amplifier is connected to the positive input terminal of the integrated amplifier U1.1.1. The differential amplifying circuit is formed by the resistor R4, the resistor R5, the resistor R6, the resistor R7, the resistor R8, the resistor R9, the capacitor C3, the capacitor C4 and the integrated operational amplifier U1.1, so that the sampling voltage can be amplified for the first stage.
In one or more embodiments of the present utility model, the linear optocoupler isolation transmission circuit includes an LED driving circuit and a conversion circuit for converting a current into a voltage, wherein an input end of the LED driving circuit is electrically connected to an output end of the pre-stage signal amplification circuit, one output end of the LED driving circuit is electrically connected to one output end of the conversion circuit, and the other output end of the LED driving circuit is correspondingly electrically connected to an input end of the conversion circuit. The LED driving circuit can generate a driving signal according to the signal output by the front-stage signal amplifying circuit and drive the converting circuit to convert the output current into voltage output.
Specifically, as shown in fig. 3, in one or more embodiments of the present utility model, the LED driving circuit includes a resistor R10, a resistor R11, a resistor R12, a capacitor C5, a triode Q1, and an integrated operational amplifier U1.2, an output end of the front-stage signal amplifying circuit is electrically connected to an inverting input end of the integrated operational amplifier U1.2 through the resistor R10, the capacitor C5 is electrically connected between the inverting input end and an output end of the integrated operational amplifier U1.2, a non-inverting input end of the integrated operational amplifier U1.2 is grounded, an output end of the integrated operational amplifier U1.2 is electrically connected to a base electrode of the triode Q1 through the resistor R11, a collector electrode of the triode Q1 is grounded, an emitter electrode of the triode Q1 is electrically connected to an input end of the conversion circuit, and an output end of the front-stage signal amplifying circuit is also electrically connected to an output end of the conversion circuit through the resistor R10. The gain of the optocoupler can be determined through the resistor R10, a driving circuit is formed through the resistor R11, the resistor R12, the capacitor C5, the triode Q1 and the integrated operational amplifier U1.2, and a driving signal is generated according to a signal output by the pre-stage signal amplifying circuit so as to drive the converting circuit to complete the conversion from current to voltage.
Specifically, as shown in fig. 3, in one or more embodiments of the present utility model, the conversion circuit includes an optocoupler U2, a resistor R13, a resistor R14, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9, a capacitor C10, and an integrated operational amplifier U4.1, where a power input end of the optocoupler U2 is connected to a power supply +12v, a ground of the optocoupler U2 is grounded, an input end of the optocoupler U2 is electrically connected to an emitter of the triode Q1, an output end of the optocoupler U2 is electrically connected to an output end of the front-stage signal amplification circuit through the resistor R10, a positive electrode and a negative electrode of another output end of the optocoupler U2 are respectively and electrically connected to a non-inverting input end and an inverting input end of the integrated operational amplifier U4.1, a non-inverting input end of the integrated operational amplifier U4.1 is grounded, the capacitor C6 and the resistor R13 are connected in parallel between the inverting input end and the output end of the integrated operational amplifier U4.1, and the integrated input end of the integrated operational amplifier U4.1 is connected to the power supply V1, and the input end of the integrated amplifier U4.1 is connected to the input end of the integrated amplifier U4.1 through the capacitor V, and the positive electrode is connected to the input end of the integrated amplifier U4.1 is connected to the capacitor V1. The resistor R13, the resistor R14, the capacitor C6, the capacitor C7, the capacitor C8 and the integrated operational amplifier U4.1 form a conversion circuit, the current output by the optocoupler U2 is converted into voltage and output to the post-stage signal arrangement circuit, and +12V is connected to the power supply end of the U2 through the R12 to play a role of current limiting, so that the LED works in a linear region.
In one or more embodiments of the present utility model, as shown in fig. 4, the post-stage signal conditioning circuit includes a resistor R18, a capacitor C14, and an integrating circuit, where an output end of the linear optocoupler isolation transmission circuit is electrically connected to an input end of the integrating circuit, an output end of the integrating circuit is electrically connected to a digital-to-analog input end of the external DSP, the resistor R18 and the capacitor C14 are connected in series between the output end of the linear optocoupler isolation transmission circuit and ground, and a common end of the resistor R18 and the capacitor C14 is electrically connected to another digital-to-analog input end of the external DSP. The voltage conversion is carried out on the signal of the output end of the optical coupler U2 through the integrating circuit, a digital-to-analog conversion input end for outputting to the external DSP; the signal output by the optocoupler U2 is filtered through the resistor R18 and the capacitor C14 and then is sent to the other digital-to-analog conversion input end of the external DSP.
Specifically, as shown in fig. 4, in one or more embodiments of the present utility model, the integrating circuit includes a resistor R15, a resistor R16, a capacitor C11, a capacitor C12, an integrated op-amp U4.2, and an integrated op-amp U5.1, the output end of the linear optocoupler isolation transmission circuit is electrically connected to the non-inverting input end of the integrated op-amp U4.2, the inverting input end of the integrated op-amp U4.2 is electrically connected to the output end, the resistor R15 and the capacitor C11 are connected in series between the output end of the integrated op-amp U4.2 and the ground, the resistor R16 and the capacitor C12 are connected in series between the common end of the resistor R15 and the capacitor C11 and the ground, the common end of the resistor R16 and the capacitor C12 is electrically connected to the non-inverting input end of the integrated op-amp U5.1, the positive power supply input end of the integrated op-amp U5.1 is connected to the power supply +5v, the common end of the DSP 5.1 is connected to the digital-analog converter, and the common end of the resistor C17 is connected to the output end of the resistor C13 and the output end of the integrated op-amp U5.1 is connected in series between the common end of the resistor R13 and the output end of the resistor C13. The resistor R15, the resistor R16, the capacitor C11, the capacitor C12, the integrated operational amplifier U4.2 and the integrated operational amplifier U5.1 form an integrating circuit, signals at the output end of the optocoupler U2 are subjected to voltage conversion and output to a digital-to-analog conversion input end of an external DSP, so that noise interference can be reduced, the precision is improved, instantaneous signals are sampled, and the response speed is ensured.
According to the high-precision voltage feedback circuit of the rectifying module for the base station, the input is biased through the front-stage signal amplifying circuit, so that the input voltage can be accurately controlled when the input voltage is low, the linear optocoupler isolation transmission circuit is used for optocoupler isolation transmission, the signal output by the front-stage signal amplifying circuit is linearly transmitted to the rear-stage signal sorting circuit while cold and hot grounds are isolated, the integral circuit is adopted in the rear-stage signal sorting large-circuit, noise can be eliminated, instantaneous signals are sampled, the response speed is guaranteed, the performance of the rectifying module is obviously improved when the circuit is applied to a digital power supply, and the size of the rectifying module is greatly reduced.
The high-precision voltage feedback circuit for the base station rectifying module of the utility model is used as a voltage feedback loop to participate in output feedback control, the algorithm matched with the digital processor can achieve high output voltage precision, high load adjustment rate and high transient response.
The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the utility model are intended to be included within the scope of the utility model.
Claims (8)
1. A high-precision voltage feedback circuit for a base station rectifying module is characterized in that: the device comprises a front-stage signal amplifying circuit, a linear optical coupler isolation transmission circuit and a rear-stage signal arrangement circuit, wherein the input end of the front-stage signal amplifying circuit is connected with direct-current voltage, the output end of the front-stage signal amplifying circuit is electrically connected with the input end of the linear optical coupler isolation transmission circuit, and the output end of the linear optical coupler isolation transmission circuit is electrically connected with the input end of the rear-stage signal arrangement circuit;
the post-stage signal arrangement circuit comprises a resistor R18, a capacitor C14 and an integration circuit, wherein the output end of the linear optocoupler isolation transmission circuit is electrically connected with the input end of the integration circuit, the output end of the integration circuit is electrically connected with one digital-to-analog conversion input end of the external DSP, the resistor R18 and the capacitor C14 are connected in series between the output end of the linear optocoupler isolation transmission circuit and the ground, and the common end of the resistor R18 and the capacitor C14 is electrically connected with the other digital-to-analog conversion input end of the external DSP.
2. The high-precision voltage feedback circuit for a base station rectifier module according to claim 1, wherein: the front-stage signal amplifying circuit comprises a voltage dividing circuit and a differential amplifying circuit, wherein two input ends of the voltage dividing circuit are respectively and correspondingly and electrically connected with positive and negative output ends of external direct-current voltage, two output ends of the voltage dividing circuit are respectively and correspondingly and electrically connected with two input ends of the differential amplifying circuit, and the output end of the differential amplifying circuit is electrically connected with the input end of the linear optocoupler isolation transmission circuit.
3. The high-precision voltage feedback circuit for a base station rectifier module according to claim 2, wherein: the voltage dividing circuit comprises a resistor R1, a resistor R2, a resistor R3, a capacitor C1 and a capacitor C2, wherein the capacitor C1 is electrically connected between positive and negative output ends of external direct-current voltage, the resistor R1, the resistor R2 and the resistor R3 are sequentially connected in series between the positive output end and the negative output end of the external direct-current voltage, the public end of the resistor R2 and the resistor R3 is electrically connected with the positive input end of the differential amplifying circuit, and the negative output end of the external direct-current voltage is electrically connected with the negative input end of the differential amplifying circuit.
4. The high-precision voltage feedback circuit for a base station rectifier module according to claim 2, wherein: the differential amplifying circuit comprises a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a capacitor C3, a capacitor C4 and an integrated operational amplifier U1.1, wherein the negative output end of external direct voltage is electrically connected with the inverting input end of the integrated operational amplifier U1.1 through the resistor R5, the inverting input end of the integrated operational amplifier U1.1 is connected with a power supply +2.5V through the resistor R4, the resistor R8 is electrically connected between the inverting input end and the output end of the integrated operational amplifier U1.1, the positive output end of the voltage dividing circuit is electrically connected with the non-inverting input end of the integrated operational amplifier U1.1 through the resistor R6, the non-inverting input end of the integrated operational amplifier U1.1 is connected with a power supply +2.5V through the resistor R9, the non-inverting input end of the integrated operational amplifier U1.1 is connected with a positive power supply +12V, and the non-inverting input end of the integrated operational amplifier U1.1.1 is connected with the input end of the integrated operational amplifier U1.1 in parallel, and the non-inverting input end of the integrated operational amplifier U1.1 is connected with the capacitor C1.1.
5. The high-precision voltage feedback circuit for a base station rectifier module of claim 1, the method is characterized in that: the linear optocoupler isolation transmission circuit comprises an LED driving circuit and a conversion circuit for converting current into voltage, wherein the input end of the LED driving circuit is electrically connected with the output end of the front-stage signal amplification circuit, one output end of the LED driving circuit is electrically connected with one output end of the conversion circuit, and the other output end of the LED driving circuit is correspondingly and electrically connected with the input end of the conversion circuit.
6. The high-precision voltage feedback circuit for a base station rectifier module of claim 5 wherein: the LED driving circuit comprises a resistor R10, a resistor R11, a resistor R12, a capacitor C5, a triode Q1 and an integrated operational amplifier U1.2, wherein the output end of the front-stage signal amplifying circuit is electrically connected with the inverting input end of the integrated operational amplifier U1.2 through the resistor R10, the capacitor C5 is electrically connected between the inverting input end and the output end of the integrated operational amplifier U1.2, the non-inverting input end of the integrated operational amplifier U1.2 is grounded, the output end of the integrated operational amplifier U1.2 is electrically connected with the base electrode of the triode Q1 through the resistor R11, the collector electrode of the triode Q1 is grounded, and the emitter electrode of the triode Q1 is electrically connected with the input end of the conversion circuit, and the output end of the front-stage signal amplifying circuit is also electrically connected with one output end of the conversion circuit through the resistor R10.
7. The high-precision voltage feedback circuit for a base station rectifier module of claim 6 wherein: the conversion circuit comprises an optocoupler U2, a resistor R13, a resistor R14, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9, a capacitor C10 and an integrated operational amplifier U4.1, wherein the power input end of the optocoupler U2 is connected with a power supply +12V, the grounding end of the optocoupler U2 is grounded, the input end of the optocoupler U2 is electrically connected with the emitting electrode of the triode Q1, one output end of the optocoupler U2 is electrically connected with the output end of the front-stage signal amplification circuit through the resistor R10, the anode and the cathode of the other output end of the optocoupler U2 are respectively and correspondingly electrically connected with the in-phase input end and the opposite-phase input end of the integrated operational amplifier U4.1, the non-inverting input end of the integrated operational amplifier U4.1 is grounded, the capacitor C6 and the resistor R13 are connected in parallel between the inverting input end and the output end of the integrated operational amplifier U4.1, the positive power input end of the integrated operational amplifier U4.1 is connected with a power supply +5V, the capacitor C7 and the capacitor C8 are connected in parallel between the positive power input end and the ground of the integrated operational amplifier U4.1, the negative power input end of the integrated operational amplifier U4.1 is connected with a-5V power supply, the capacitor C9 and the capacitor C10 are connected in parallel between the negative power input end and the ground of the integrated operational amplifier U4.1, and the output end of the integrated operational amplifier U4.1 is electrically connected with the input end of the post signal arrangement circuit through the resistor R14.
8. The high-precision voltage feedback circuit for a base station rectifier module according to claim 1, wherein: the integrating circuit comprises a resistor R15, a resistor R16, a capacitor C11, a capacitor C12, an integrated operational amplifier U4.2 and an integrated operational amplifier U5.1, wherein the output end of the linear optical coupling isolation transmission circuit is electrically connected with the non-inverting input end of the integrated operational amplifier U4.2, the inverting input end of the integrated operational amplifier U4.2 is electrically connected with the output end, the resistor R15 and the capacitor C11 are connected in series between the output end of the integrated operational amplifier U4.2 and the ground, the resistor R16 and the capacitor C12 are connected in series between the common end of the resistor R15 and the capacitor C11 and the ground, the common end of the resistor R16 and the capacitor C12 are electrically connected with the non-inverting input end of the integrated operational amplifier U5.1, the inverting input end of the integrated operational amplifier U5.1 is connected with the output end of a power supply +5V, the source input end of the integrated operational amplifier U5.1 is connected with the power supply-5V, the common end of the resistor R16 and the capacitor C13 are connected in series between the output end of the integrated operational amplifier U5.1 and the ground, and the common end of the resistor C13 is connected in series between the output end of the integrated operational amplifier U.1 and the capacitor C13 and the output end of the integrated operational amplifier U.1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320967553.9U CN220440571U (en) | 2023-04-26 | 2023-04-26 | High-precision voltage feedback circuit for base station rectifying module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320967553.9U CN220440571U (en) | 2023-04-26 | 2023-04-26 | High-precision voltage feedback circuit for base station rectifying module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220440571U true CN220440571U (en) | 2024-02-02 |
Family
ID=89702338
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320967553.9U Active CN220440571U (en) | 2023-04-26 | 2023-04-26 | High-precision voltage feedback circuit for base station rectifying module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220440571U (en) |
-
2023
- 2023-04-26 CN CN202320967553.9U patent/CN220440571U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201533301U (en) | Photosensitive receiving circuit for optoelectronic coupler | |
| CN207939479U (en) | A kind of push-pull amplifier circuit and intermodulation distortion cancellation element | |
| CN220440571U (en) | High-precision voltage feedback circuit for base station rectifying module | |
| CN208589920U (en) | A kind of isolated form Wide-range voltage-stabilised power source circuit | |
| CN113835038A (en) | Isolated sampling method applied to power supply | |
| CN217931799U (en) | Wide voltage input signal acquisition circuit | |
| CN212115293U (en) | Low-frequency broadband analog signal isolation circuit | |
| CN109889201A (en) | Signal acquisition circuit and measuring instrument | |
| CN211015186U (en) | Voltage follower circuit | |
| CN210444248U (en) | Control guide circuit of alternating-current charging pile | |
| CN108418563A (en) | A kind of feedback control circuit of power amplifier | |
| CN209881480U (en) | Adapter control circuit and adapter | |
| CN213520697U (en) | High-power semiconductor laser | |
| CN210780732U (en) | High-precision analog quantity signal output circuit of simple PLC | |
| CN117459028A (en) | Voltage fast response accurate control system and method suitable for high-voltage pulse circuit | |
| CN219459033U (en) | PWM signal output circuit and charging device | |
| CN210864460U (en) | Low-voltage electronic equipment control system | |
| CN220368707U (en) | Isolation sampling circuit | |
| CN206077341U (en) | A kind of High Speed Data Acquisition Circuit | |
| CN220323793U (en) | Heating circuit, heating control system and mass spectrometer | |
| CN209805790U (en) | Electronic equipment analog signal calibration circuit | |
| CN210469268U (en) | Circuit for converting bipolar differential signal into unipolar single-ended signal | |
| CN218100031U (en) | Low-power-consumption constant current source output system | |
| CN210168036U (en) | Comprehensive energy management system | |
| CN220855025U (en) | MPPT charging current sampling circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |