Document segmentation device with source-electrode degradation frame

Abstract

The invention includes following parts: unit of common source electrode of possessing degradation impedance of source electrode in use for supplying an input signal and reference voltage of the input signal; a comparing unit in use for comparing the input signal with reference voltage of the input signal, and outputting a square wave corresponding to the input signal. The invention is applicable to FM demodulalation system. Through high frequency distortion part demodulated by demodulalator and transmitted on air from frequency shift modulation signal at back end of signal demodulator, the data decollator generates perfective square wave for circuit in fundamental frequency for back end to use. The invention can obtain accurate reference voltage without influence of noise, without need of AC coupled capacitance. Advantages are: reducing difficulty and cost of fabricating IC.

Description

Technical field [0001] The present invention is a data divider with a source degraded architecture, in particular to a data splitter used in an FM demodulation system. At the back end of a signal demodulator, a frequency offset modulation signal is transmitted through the air and decoded by the demodulator. The adjusted high-frequency distortion part uses a data splitter to generate a perfect square wave for the baseband circuit of the back end. Background technique [0002] Normal video data or digitally transmitted data are modulated to a square wave form before transmission, and then transmitted to the receiving end through a specific transmission medium. Usually the frequency offset modulation signal is transmitted through the air and is transmitted by a signal demodulator. After demodulation, the generated frequency offset modulation signal has distortion in the high frequency part. The signal after the modulation is often inaccurate due to distortion and the reference volta...

AI Technical Summary

Problems solved by technology

However, this method requires a coupling capacitor C 1 In order to avoid the DC voltage of the previous stage from affecting the operating voltage of the input stage of the data divider, and to avoid distortion, the capacitor should not be too small, which will cause difficulties in the manufacture of integrated circuits and require large-area capacitors. In addition, this method uses The reference voltage is obtained by the characteristics of capacitor charging and discharging. When dealing with high-frequency signals, it is easy to cause distortion of the reference voltage due to incomplete charging and discharging of the capacitor.

Images