High-frequency signal output circuit

Abstract

The invention relates to a high-frequency signal output circuit. The high-frequency signal output circuit comprises a first signal processing circuit and a second signal processing circuit which are cascaded, a high-frequency square wave signal PWM _ IN is input into the signal input end of the first signal processing circuit, the output end of the first signal processing circuit is connected withthe input end of the second signal processing circuit, and the output end of the second signal processing circuit outputs a stable high-frequency square wave signal PWM _ OUT after amplitude modulation. An input PWM _ IN signal is a PWM square signal sent by a main chip of a vehicle control unit, a working power supply VCC serves as an amplitude modulation reference of the PWM _ IN signal, and astable high-frequency square signal PWM _ OUT is output to serve as signal sampling input of external equipment after the PWM _ IN signal is processed by the circuit provided by the invention. The high-frequency signal output circuit has the characteristics of suitability for various use occasions, wide voltage, stronger adaptability, reliable performance, stable output waveform, extremely low cost, extremely easy purchase of devices and the like.

Description

technical field [0001] The invention relates to the technical field of automobile electronic signal acquisition, processing and control, in particular to a high-frequency signal output circuit. Background technique [0002] With the rapid development of modern electronic technology, especially electric vehicles, the performance requirements of automotive electronic components are getting higher and higher, and the requirements for signal processing speed are also gradually increasing, resulting in high-frequency signal processing circuits on the vehicle. It is used more and more widely. [0003] The output waveform of the car controller has certain technical requirements. For example, a high-frequency square wave signal needs to be output to other electronic devices in the vehicle. The highest frequency value of the required square wave needs to reach or exceed 100KHz. The signal has a good waveform performance, and the waveform duty cycle should not be higher than 65%, and...

AI Technical Summary

Problems solved by technology

[0004] In view of this, firstly, the circuit is built based on the conventional triode device combination mode. After actual circuit simulation and testing, it is known that the circuit built with the triode barely has a square wave output in the low frequency band (100Hz and below frequency points), but the waveform is distorted. Seriously, the frequency points above this frequency point will cause severe waveform distortion, and various characteristic parameters of the required waveform cannot be guaranteed.

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