Patent ID: 6147533
Filing Date: 2000-11-14
Classification: H03F,H03K

Abstract:
A data communication receiving element for receiving data via a light signal comprising:a photo-receiving element for receiving the light signal and converting said light signal to a current signal;amplifying means for amplifying said current signal after converting said current signal to a voltage signal;waveform shaping means for shaping an output voltage waveform from said amplifying means to a substantially square pulse; andwaveform changing means for changing said substantially square pulse to a non-square pulse for output, and suppressing deterioration of a signal to noise ratio of the data communication receiving element by extending a rising time of said substantially square pulse so as to gradually increase from a relatively low potential level to a relatively high potential level, and extending a falling time of said substantially square pulse so as to gradually decrease from the relatively high potential level to the relatively low potential level.