Signal processing system

Abstract

The embodiment of the invention discloses a signal processing system, which comprises a parameter regulation circuit, a capacitance isolation circuit, a rectifier circuit and a frequency halving circuit, wherein the parameter regulation circuit is used for regulating a parameter of a voltage signal to obtain a regulated signal; the capacitance isolation circuit is used for isolating the regulated signal to obtain a sharp pulse signal; the rectifier circuit is used for rectifying the sharp pulse signal to obtain a forward signal, wherein a difference between the amplitude of the forward signal and the amplitude of the voltage signal is less than a preset threshold value, and the cycle of the forward signal is a half of the cycle of the voltage signal; and the frequency halving circuit is used for outputting a frequency division signal by taking the forward signal as the clock pulse of a frequency division circuit, wherein the amplitude and cycle of the frequency division signal are the same as those of the forward signal. By the technical scheme, the normal use of the signal is ensured. Simultaneously, in system designing, the capacitance of a capacitor in the capacitance isolation circuit is set according to the amplitude and frequency of the voltage signal to ensure the capacitance isolation circuit to have relatively higher capacitive reactance, and when the signal passes through the capacitance isolation circuit, output current is low so as to avoid damages to a user and realize isolative protection.

Description

technical field [0001] The present invention relates to the technical field of signal processing, and more specifically, to a signal processing system. Background technique [0002] The output voltage signal of the outgoing line TNV (telecommunication network voltage)-2 circuit or the outgoing line TNV-3 circuit of the terminal product is modulated by the modulator in the signal processing system and then transmitted to the client. Using the demodulator in the system to demodulate, the difference between the demodulated signal amplitude and the voltage signal amplitude is within the preset threshold, and the cycle is the same as the voltage signal cycle, ensuring the normal use of the signal. [0003] However, under normal working conditions, the output voltage signal of the TNV-2 circuit of the outgoing line is a high-voltage low-frequency square wave signal, and the voltage value exceeds the limit value of SELV (Safety Extra Low Voltage). Under normal working conditions, ...

AI Technical Summary

Problems solved by technology

[0003] However, under normal working conditions, the output voltage signal of the TNV-2 circuit of the outgoing line is a high-voltage low-frequency square wave signal, and the voltage value exceeds the limit value of SELV (Safety Extra Low Voltage). Under normal working conditions, the output voltage signal of TNV-3 circuit also exceeds the limit of SELV

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