Electronic equipment analog signal calibration circuit

Abstract

The invention discloses an electronic equipment analog signal calibration circuit. The circuit comprises a frequency acquisition circuit, a feedback constant current circuit and a push-pull output circuit. The frequency acquisition circuit acquires signal frequency in an analog signal channel in the low-voltage electronic equipment control terminal; the feedback constant current circuit utilizes atriode Q1, a triode Q2 and a voltage stabilizing tube D3 to form a constant current source circuit stable signal potential. Meanwhile, a current-voltage conversion circuit composed of a variable resistor R8 and an operational amplifier AR3 is used for converting a current signal into a voltage signal and inputting the voltage signal into a push-pull output circuit; an abnormal signal detection circuit is composed of a silicon controlled rectifier VTL1 and a voltage-regulator tube D4 and feeds back abnormal signals to the collector electrode of a triode Q2. and finally, the push-pull output circuit uses a triode Q3, a triode Q4 and a variable resistor R16 to form a push-pull circuit to reduce signal conduction loss and then output the signal, so that the signal frequency can be converted into a compensation signal of a signal in an analog signal channel in a remote intelligent equipment control terminal.

Description

technical field [0001] The invention relates to the technical field of circuits, in particular to an analog signal calibration circuit for electronic equipment. Background technique [0002] At present, with the continuous development of science and technology, there are more and more electronic equipment, which greatly improves people's quality of life and level. Then, the most feedback on low-voltage electronic equipment is that the analog signal received by the control terminal has a large error, that is, the factory The signal in the analog signal channel of the low-voltage electronic equipment control terminal is prone to attenuation during transmission, resulting in insufficient signal power, which seriously affects the use of low-voltage electronic equipment. Contents of the invention [0003] In view of the above situation, in order to overcome the defects of the prior art, the object of the present invention is to provide an electronic equipment analog signal cali...

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Problems solved by technology

[0002] At present, with the continuous development of science and technology, there are more and more electronic equipment, which greatly improves people's quality of life and level. Then, the most feedback on low-voltage electronic equipment is that the analog signal received by the control terminal has a large error, that is, the factory The signal in the analog signal channel of the low-voltage electronic equipment control terminal is prone to attenuation during transmission, resulting in insufficient signal power, which seriously affects the use of low-voltage electronic equipment

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