CN108449062B - Control device of electronic product - Google Patents
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- CN108449062B CN108449062B CN201810229402.7A CN201810229402A CN108449062B CN 108449062 B CN108449062 B CN 108449062B CN 201810229402 A CN201810229402 A CN 201810229402A CN 108449062 B CN108449062 B CN 108449062B
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- 230000008054 signal transmission Effects 0.000 claims abstract description 17
- 230000000694 effects Effects 0.000 claims abstract description 12
- 239000003990 capacitor Substances 0.000 claims abstract description 11
- 238000001914 filtration Methods 0.000 claims abstract description 11
- 230000006641 stabilisation Effects 0.000 claims description 15
- 238000011105 stabilization Methods 0.000 claims description 15
- 230000000087 stabilizing effect Effects 0.000 claims description 15
- 230000003068 static effect Effects 0.000 claims description 7
- 230000036039 immunity Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G11/00—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general
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Abstract
The invention discloses a control device of an electronic product, which comprises a signal receiving circuit, a logarithmic differential feedback circuit and a comparison voltage-stabilizing output circuit, wherein the signal receiving circuit receives signals at the input end of a signal transmission channel in the control device of the electronic product, the logarithmic differential feedback circuit receives the signals output by the signal receiving circuit in two paths, one path of the signals is subjected to current limiting by a slide rheostat RW2 and then input into the non-inverting input end of an operational amplifier AR2, the other path of the signals is subjected to processing by a logarithmic circuit consisting of an operational amplifier AR4 and a triode Q1, the triode Q2 is used as an emitter and serves as a feedback signal to achieve the effects of adjusting the amplitude of the signals and feeding back stable signals, the comparison voltage-stabilizing output circuit receives the output signals of the logarithmic differential feedback circuit, an LC circuit consisting of an inductor L2 and a capacitor C1 which are connected in parallel is designed to output after filtering, namely input into the signal transmission channel in the control device of the electronic product, so that the signals in, the interference immunity of the signal is improved.
Description
Technical Field
The present invention relates to the field of electronic product control technologies, and in particular, to a control device for an electronic product.
Background
Along with the development of science and technology, various electronic products develop along with the development of the science and technology, the electronic products become an indispensable part of the life of people, great life convenience is brought to people, a control device of the electronic products is an important component in the use of the electronic products, signals in a signal transmission channel of the control device of the low-voltage electronic products are easy to be unstable and are subjected to electromagnetic interference of other similar electronic products, the change of signal amplitude is easy to be caused, the signal is disordered, even the electronic products can generate error information, the service life of the low-voltage electronic products is influenced, and the use experience of users is seriously influenced.
The present invention provides a new solution to this problem.
Disclosure of Invention
In view of the above situation, in order to overcome the defects of the prior art, the present invention aims to provide a control device for an electronic product, which has the characteristics of ingenious design and humanized design, effectively stabilizes the instability of signals in a signal transmission channel of the control device for a low-voltage electronic product, and improves the anti-interference performance of the signals.
The technical scheme includes that the control device of the electronic product comprises a signal receiving circuit, a logarithmic differential feedback circuit and a comparative voltage-stabilizing output circuit, wherein the signal receiving circuit receives signals at the input end of a signal transmission channel in the control device of the electronic product, the logarithmic differential feedback circuit receives signals output by the signal receiving circuit in two paths, one path of the signals is subjected to current limiting through a slide rheostat RW2 and then input into the non-inverting input end of an operational amplifier AR2, meanwhile, a power supply +10V provides a base potential for the non-inverting input end of the operational amplifier AR2, the other path of the signals is processed through a logarithmic circuit composed of an operational amplifier AR4 and a triode Q1, the signals output by the logarithmic circuit are the reverse-phase input base potential of the operational amplifier AR1, the operational amplifier AR2 and the operational amplifier AR1 form a differential circuit, a static working point of stable signal voltage is formed, output signals of the operational amplifier AR2 are respectively the non-inverting input end potential of a comparator AR3 and the collector potential of, the output signal of the operational amplifier AR1 is the base potential of the triode Q2 and the reverse phase input end potential of the comparator AR3, the triode Q2 is a feedback signal, the reverse phase input end potential of the operational amplifier AR1 is adjusted, the effects of adjusting the signal amplitude and feeding back a stable signal are achieved, finally the comparison voltage stabilization output circuit receives the output signal of the logarithmic difference feedback circuit, the comparator AR3 compares the signal, a voltage stabilization circuit consisting of the triode Q3 and a voltage stabilizing tube D7 is designed for stabilizing the voltage, an LC circuit consisting of an inductor L2 and a capacitor C1 which are connected in parallel is designed for filtering and outputting, and the signal is input into a signal transmission channel in a control device of an electronic product;
the logarithmic differential feedback circuit comprises an operational amplifier AR4, an inverting input terminal of the operational amplifier AR4 is connected with one end of a resistor R3 and a collector of a transistor Q1, the other end of the resistor R3 is connected with a cathode of a diode D2, a base of the transistor Q1 is grounded, an emitter of the transistor Q1 is connected with an output terminal of the operational amplifier AR4 and an inverting input terminal of the operational amplifier AR1 and one end of the resistor R1, a non-inverting input terminal of the operational amplifier AR1 is connected with one end of the resistor R1, the other end of the resistor R1 is grounded, a non-inverting input terminal of the operational amplifier AR1 is connected with one end of a contact 2 of a sliding rheostat RW1 and one end of the resistor R1, an output terminal of the operational amplifier AR1 is connected with one end of the resistor R1 and an anode of the diode D1, a cathode of the diode D1 is connected with one end of the contact 3 of the sliding rheostat 1, one end of the contact 1 of the sliding rheostat 1, one end of the resistor R1 and the output terminal of the inverting input terminal of the resistor R, the other end of the resistor R7 is connected with one end of a resistor R11 and one end of a resistor R12, the other end of the resistor R11 is connected with the anode of a diode D4, the cathode of a diode D4 is connected with the collector of a triode Q2, the base of a triode Q2 is connected with the other end of a resistor R9, the emitter of a triode Q2 is connected with the other end of a resistor R10, the non-inverting input end of an operational amplifier AR2 is connected with one end of a resistor R5, the other end of a resistor R5 is connected with one end of an inductor L3, the other end of the inductor L3 is connected with a contact 2 of a sliding rheostat RW 3, a contact 3 of the sliding rheostat 3 is connected with the cathode of the diode D3, a contact 1 of the sliding rheostat RW 3 is connected with the cathode of the diode D3, the anode of the diode D3 is connected with one end of the resistor R3, the other end of the resistor R3 is connected with the anode of the.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages;
1, the signal receiving circuit receives the signal at the input end of the signal transmission channel in the control device of the electronic product, the logarithmic differential feedback circuit receives the signal output by the signal receiving circuit in two paths, one path is input into the non-inverting input end of the operational amplifier AR2 after being limited by the slide rheostat RW2, meanwhile, the power supply +10V provides the base potential for the non-inverting input end of the operational amplifier AR2, the other path is processed by the logarithmic circuit composed of the operational amplifier AR4 and the triode Q1, the operational amplifier AR2 and the operational amplifier AR1 compose the differential circuit, the static working point of the signal voltage is stabilized, the triode Q2 is the emitter and is the feedback signal, the position of the inverting input end of the operational amplifier AR1 is adjusted, the effects of adjusting the signal amplitude and feeding back the stabilized signal are achieved, finally the comparison voltage stabilizing output circuit receives the output signal of the logarithmic differential feedback circuit, the comparator voltage stabilizing circuit AR3 compares the signal, and the voltage stabilization composed of the triode Q, and the LC circuit formed by connecting the inductor L2 and the capacitor C1 in parallel is designed to be filtered and then output, namely, the filtered signal is input into a signal transmission channel in a control device of an electronic product, so that the signal in the signal transmission channel of the control device of the low-voltage electronic product is effectively stabilized to be easy to be unstable, and the anti-interference performance of the signal is improved.
2, the logarithmic differential feedback circuit receives signals output by the signal receiving circuit in two paths, one path is subjected to current limiting by the slide rheostat RW2 and then input into the in-phase input end of the operational amplifier AR2, meanwhile, the +10V power supply supplies a base potential to the in-phase input end of the operational amplifier AR2 after being subjected to voltage division by the resistors R1 and R2, wherein the inductor L3 has a filtering effect, the diode D5 and the diode D6 have a function of unidirectional conduction current, the other path is processed by a logarithmic circuit consisting of the operational amplifier AR4 and the triode Q1, the signal output by the logarithmic circuit is the reverse phase input end group potential of the operational amplifier AR1, when the signal amplitude is abnormal, the triode Q2 is conducted, the triode Q2 is used as a transmitting electrode and is used as a feedback signal, the potential of the reverse phase input end of the operational amplifier AR1 is increased, namely the potential of the output end of the operational amplifier AR 1.
Drawings
Fig. 1 is a block diagram of a control device of an electronic product according to the present invention.
Fig. 2 is a schematic diagram of a control device of an electronic product according to the present invention.
Detailed Description
The foregoing and other technical matters, features and effects of the present invention will be apparent from the following detailed description of the embodiments, which is to be read in connection with the accompanying drawings of fig. 1 to 2. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
In the first embodiment, the control device of the electronic product includes a signal receiving circuit, a logarithmic differential feedback circuit and a comparative voltage stabilizing output circuit, the signal receiving circuit receives a signal at an input end of a signal transmission channel in the control device of the electronic product, the logarithmic differential feedback circuit receives signals output by the signal receiving circuit in two paths, one path of the signals is current-limited by a slide rheostat RW2 and then input into a non-inverting input end of an operational amplifier AR2, meanwhile, a power supply +10V provides a base potential for the non-inverting input end of the operational amplifier AR2, the other path of the signals is processed by a logarithmic circuit composed of an operational amplifier AR4 and a triode Q1, signals output by the logarithmic circuit are respectively a non-inverting input end potential of the operational amplifier AR1 and a non-inverting input end potential of the comparator AR 23, the operational amplifier AR2 and the operational amplifier AR 5 constitute a differential circuit, a static operating point of a stable signal voltage is provided, and output signals of the operational amplifier 46ar 35 are respectively a non-inverting input end potential of the comparator AR3 and a, the output signal of the operational amplifier AR1 is the base potential of the triode Q2 and the reverse phase input end potential of the comparator AR3, the triode Q2 is a feedback signal, the reverse phase input end potential of the operational amplifier AR1 is adjusted, the effects of adjusting the signal amplitude and feeding back a stable signal are achieved, finally the comparison voltage stabilization output circuit receives the output signal of the logarithmic difference feedback circuit, the comparator AR3 compares the signal, a voltage stabilization circuit consisting of the triode Q3 and a voltage stabilizing tube D7 is designed for stabilizing the voltage, an LC circuit consisting of an inductor L2 and a capacitor C1 which are connected in parallel is designed for filtering and outputting, and the signal is input into a signal transmission channel in a control device of an electronic product;
the logarithmic differential feedback circuit receives signals output by the signal receiving circuit in two paths, one path of the logarithmic differential feedback circuit is subjected to current limiting through a sliding rheostat RW2 and then is input into a non-inverting input end of an operational amplifier AR2, meanwhile, a power supply +10V is subjected to voltage division through resistors R1 and R2 and then provides a base potential for the non-inverting input end of the operational amplifier AR2, an inductor L3 plays a filtering effect, a diode D5 and a diode D6 play a role in unidirectional conduction current, the other path of the logarithmic circuit is processed through a logarithmic circuit formed by an operational amplifier AR4 and a triode Q1, the signals output by the logarithmic circuit are the reverse phase input end potential of the operational amplifier AR1, the operational amplifier AR2 and the operational amplifier AR1 form a differential circuit, the static working point of signal voltage is stabilized, the output signals of the operational amplifier AR2 are respectively the non-inverting input end potential of a comparator AR3 and the collector potential of a triode Q2, the output signals of the operational amplifier AR1 are the base potential of a triode, when the signal amplitude is abnormal, the triode Q2 is conducted, the triode Q2 is used as a transmitter and serves as a feedback signal, the potential of the inverting input end of the operational amplifier AR1 is increased, that is, the potential of the output end of the operational amplifier AR1 is decreased, so that the effects of adjusting the signal amplitude and feeding back a stable signal are achieved, the inverting input end of the operational amplifier AR4 is connected with one end of the resistor R3 and the collector of the triode Q1, the other end of the resistor R3 is connected with the negative electrode of the diode D2, the base of the triode Q1 is grounded, the emitter of the triode Q1 is connected with the output end of the operational amplifier AR4 and the inverting input end of the operational amplifier AR1 and one end of the resistor R10, the non-inverting input end of the operational amplifier AR4 is connected with one end of the resistor R4, the other end of the resistor R4 is grounded, the non-phase input end of the operational amplifier AR1 is connected with the contact 2 of the sliding rheostat RW1 and one end of, the cathode of the diode D8 is connected to one end of the resistor R13, the contact 3 of the sliding resistor RW1 is connected to the contact 1 of the sliding resistor RW1, one end of the resistor R6 and the inverting input terminal of the operational amplifier AR2, the other end of the resistor R6 is connected to the output terminal of the operational amplifier AR2 and one end of the resistor R7, the other end of the resistor R7 is connected to one end of the resistor R7 and one end of the resistor R7, the other end of the resistor R7 is connected to the anode of the diode D7, the cathode of the diode D7 is connected to the collector of the transistor Q7, the base of the transistor Q7 is connected to the other end of the resistor R7, the emitter of the transistor Q7 is connected to the other end of the resistor R7, the non-inverting input terminal of the operational amplifier AR 7, the other end of the resistor R7 is connected to one end of the inductor L7, the other end of the sliding resistor L7 is connected to the contact 2 of the sliding resistor RW 7, the cathode of the sliding resistor R3, the anode of the diode D6 is connected with one end of the resistor R2, the other end of the resistor R2 is connected with the anode of the diode D5 and one end of the resistor R1, the other end of the resistor R1 is connected with the power supply +10V, and the cathode of the diode D5 is grounded.
In the second embodiment, on the basis of the first embodiment, the signal receiving circuit receives a signal at the input end of a signal transmission channel in a control device of an electronic product, a voltage regulator tube D1 plays a role in voltage regulation, an inductor L1 performs filtering, one end of an inductor L1 is connected with the anodes of a diode D3 and a diode D2, the other end of an inductor L1 is connected with a signal output port and the cathode of a voltage regulator tube D1, and the anode of the voltage regulator tube D1 is grounded.
In a third embodiment, on the basis of the first embodiment, the comparison and voltage stabilization output circuit receives a signal output by a logarithmic differential feedback circuit, the comparator AR3 compares the signal, and simultaneously, a voltage stabilization circuit composed of a transistor Q3 and a voltage stabilization tube D7 is designed to stabilize the signal, and an LC circuit composed of an inductor L2 and a capacitor C1 in parallel is designed to output the signal after filtering, so as to improve the anti-interference performance of the signal, i.e., the signal is input into a signal transmission channel in a control device of an electronic product, the inverting input end of the comparator AR3 is connected to the other end of a resistor R13 and the other end of a resistor R12, the output end of the operational amplifier AR3 is connected to one end of a resistor R15 and the collector of a transistor Q3, the other end of a resistor R15 is connected to the base of a transistor Q3 and the cathode of a voltage stabilization tube D7, the anode of the voltage stabilization tube D7 is grounded, the emitter of a transistor Q7378 is connected to one end of an inductor L6866, the other end of the capacitor C1 is grounded, and the other end of the resistor R16 is connected with the signal output port.
When the invention is used in detail, the control device of the electronic product comprises a signal receiving circuit, a logarithmic differential feedback circuit and a comparison voltage-stabilizing output circuit, wherein the signal receiving circuit receives signals at the input end of a signal transmission channel in the control device of the electronic product, the logarithmic differential feedback circuit receives signals output by the signal receiving circuit in two paths, one path of the signals is subjected to current limiting through a slide rheostat RW2 and then is input into the non-inverting input end of an operational amplifier AR2, meanwhile, a power supply +10V provides a base potential for the non-inverting input end of the operational amplifier AR2, the other path of the signals is processed through a logarithmic circuit consisting of an operational amplifier AR4 and a triode Q1, signals output by the logarithmic circuit are respectively the base potential of the inverting input end of the operational amplifier AR1 and the potential of the inverting input end of a comparator AR3, the operational amplifier 2 and the operational amplifier AR1 form a differential circuit, the static working point of the signal voltage is stabilized, output signals of the operational amplifier 2 are respectively the potential of the base potential of the non-inverting input, the output signal of the operational amplifier AR1 is the base potential of the triode Q2 and the reverse phase input end potential of the comparator AR3, the triode Q2 is a feedback signal, the reverse phase input end potential of the operational amplifier AR1 is adjusted, the effects of adjusting the signal amplitude and feeding back a stable signal are achieved, finally the comparison voltage stabilization output circuit receives the output signal of the logarithmic difference feedback circuit, the comparator AR3 compares the signal, a voltage stabilization circuit consisting of the triode Q3 and a voltage stabilizing tube D7 is designed for stabilizing the voltage, an LC circuit consisting of an inductor L2 and a capacitor C1 which are connected in parallel is designed for filtering and outputting, and the signal is input into a signal transmission channel in a control device of an electronic product;
the logarithmic differential feedback circuit receives signals output by the signal receiving circuit in two paths, one path of the logarithmic differential feedback circuit is subjected to current limiting through a sliding rheostat RW2 and then is input into a non-inverting input end of an operational amplifier AR2, meanwhile, a power supply +10V is subjected to voltage division through resistors R1 and R2 and then provides a base potential for the non-inverting input end of the operational amplifier AR2, an inductor L3 plays a filtering effect, a diode D5 and a diode D6 play a role in unidirectional conduction current, the other path of the logarithmic circuit is processed through a logarithmic circuit formed by an operational amplifier AR4 and a triode Q1, the signals output by the logarithmic circuit are the reverse phase input end potential of the operational amplifier AR1, the operational amplifier AR2 and the operational amplifier AR1 form a differential circuit, the static working point of signal voltage is stabilized, the output signals of the operational amplifier AR2 are respectively the non-inverting input end potential of a comparator AR3 and the collector potential of a triode Q2, the output signals of the operational amplifier AR1 are the base potential of a triode, when the signal amplitude is abnormal, the triode Q2 is conducted at this time, the triode Q2 is an emitter which is a feedback signal, the potential of the inverting input end of the operational amplifier AR1 is increased, that is, the potential of the output end of the operational amplifier AR1 is decreased, and the effects of adjusting the signal amplitude and feeding back a stable signal are achieved, the comparison and voltage stabilization output circuit receives the output signal of the logarithmic difference feedback circuit, the comparator AR3 compares the signal, and simultaneously, a voltage stabilizing circuit composed of the triode Q3 and a voltage stabilizing tube D7 is designed for stabilizing the voltage and further stabilizing the signal, and an LC circuit composed of an inductor L2 and a capacitor C1 which are connected in parallel is designed for filtering and outputting, so that the anti-interference performance of the signal is improved, that is, the signal is.
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 (3)
1. The control device of the electronic product comprises a signal receiving circuit, a logarithmic differential feedback circuit and a comparison voltage-stabilizing output circuit, and is characterized in that the signal receiving circuit receives signals at the input end of a signal transmission channel in the control device of the electronic product, the logarithmic differential feedback circuit receives the signals output by the signal receiving circuit in two paths, one path of the signals is subjected to current limiting through a slide rheostat RW2 and then input into the non-inverting input end of an operational amplifier AR2, meanwhile, a power supply +10V provides a base potential for the non-inverting input end of the operational amplifier AR2, the other path of the signals is processed through a logarithmic circuit consisting of an operational amplifier AR4 and a triode Q1, the signals output by the logarithmic circuit are the anti-inverting input base potential of the operational amplifier AR1, the operational amplifier AR2 and the operational amplifier AR1 form a differential circuit, a static working point of a stable signal voltage is formed, output signals of the operational amplifier AR2 are respectively the non-inverting input end potential of a comparator AR3 and, the output signal of the operational amplifier AR1 is the base potential of the triode Q2 and the reverse phase input end potential of the comparator AR3, the triode Q2 is a feedback signal, the reverse phase input end potential of the operational amplifier AR1 is adjusted, the effects of adjusting the signal amplitude and feeding back a stable signal are achieved, finally the comparison voltage stabilization output circuit receives the output signal of the logarithmic difference feedback circuit, the comparator AR3 compares the signal, a voltage stabilization circuit consisting of the triode Q3 and a voltage stabilizing tube D7 is designed for stabilizing the voltage, an LC circuit consisting of an inductor L2 and a capacitor C1 which are connected in parallel is designed for filtering and outputting, and the signal is input into a signal transmission channel in a control device of an electronic product;
the logarithmic differential feedback circuit comprises an operational amplifier AR4, an inverting input terminal of the operational amplifier AR4 is connected with one end of a resistor R3 and a collector of a transistor Q1, the other end of the resistor R3 is connected with a cathode of a diode D2, a base of the transistor Q1 is grounded, an emitter of the transistor Q1 is connected with an output terminal of the operational amplifier AR4 and an inverting input terminal of the operational amplifier AR1 and one end of the resistor R1, a non-inverting input terminal of the operational amplifier AR1 is connected with one end of the resistor R1, the other end of the resistor R1 is grounded, a non-inverting input terminal of the operational amplifier AR1 is connected with one end of a contact 2 of a sliding rheostat RW1 and one end of the resistor R1, an output terminal of the operational amplifier AR1 is connected with one end of the resistor R1 and an anode of the diode D1, a cathode of the diode D1 is connected with one end of the contact 3 of the sliding rheostat 1, one end of the contact 1 of the sliding rheostat 1, one end of the resistor R1 and the output terminal of the inverting input terminal of the resistor R, the other end of the resistor R7 is connected with one end of a resistor R11 and one end of a resistor R12, the other end of the resistor R11 is connected with the anode of a diode D4, the cathode of a diode D4 is connected with the collector of a triode Q2, the base of a triode Q2 is connected with the other end of a resistor R9, the emitter of a triode Q2 is connected with the other end of a resistor R10, the non-inverting input end of an operational amplifier AR2 is connected with one end of a resistor R5, the other end of a resistor R5 is connected with one end of an inductor L3, the other end of the inductor L3 is connected with a contact 2 of a sliding rheostat RW 3, a contact 3 of the sliding rheostat 3 is connected with the cathode of the diode D3, a contact 1 of the sliding rheostat RW 3 is connected with the cathode of the diode D3, the anode of the diode D3 is connected with one end of the resistor R3, the other end of the resistor R3 is connected with the anode of the.
2. The control device of the electronic product according to claim 1, wherein the signal receiving circuit comprises an inductor L1, one end of the inductor L1 is connected with the anodes of the diode D3 and the diode D2, the other end of the inductor L1 is connected with the signal input port and the cathode of the voltage regulator tube D1, and the anode of the voltage regulator tube D1 is grounded.
3. The control device of the electronic product according to claim 1 or 2, wherein the comparison voltage-stabilizing output circuit comprises a comparator AR3, the inverting input terminal of the comparator AR3 is connected to the other end of a resistor R13, the non-inverting input terminal of the comparator AR3 is connected to the other end of a resistor R12, the output terminal of the operational amplifier AR3 is connected to one end of a resistor R15 and the collector of a transistor Q3, the other end of the resistor R15 is connected to the base of a transistor Q3 and the cathode of a regulator D7, the anode of the regulator D7 is grounded, the emitter of the transistor Q3 is connected to one end of an inductor L2, the other end of the inductor L2 is connected to one end of a capacitor C1 and one end of a resistor R16, the other end of the capacitor C1 is grounded, and the other end of the resistor R16.
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US6262628B1 (en) * | 1999-06-23 | 2001-07-17 | Mitsubishi Denki Kabushiki Kaisha | Differential amplifier circuit |
CN105356298A (en) * | 2015-05-29 | 2016-02-24 | 西安科技大学 | Digital anion generator control method |
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US6262628B1 (en) * | 1999-06-23 | 2001-07-17 | Mitsubishi Denki Kabushiki Kaisha | Differential amplifier circuit |
CN105356298A (en) * | 2015-05-29 | 2016-02-24 | 西安科技大学 | Digital anion generator control method |
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