Patent ID: 6653616
Filing Date: 2003-11-25
Classification: H03M

Abstract:
A device for processing output signals from a photo-diode comprising:a comparative conversion circuit receiving, inputting an analog output signal from the photo-diode and converting the analog output signal to a relative and digital square wave signal for outputting; a reference circuit inducting the analog output signal from the photo-diode and converting it into a reference signal for outputting; a feedback logic unit connecting and inputting the reference signal output from the reference circuit, checking a high or low electric potential of the reference signal, outputting a plurality of counting values of digital bits based on the high or low electric potential state of the reference signal, increasing and outputting the counting values being under the state of low electric potential for too long; a programmable adjusting resistor connecting to the input path of the analog output signal of the comparative conversion circuit and receiving the counting values from the feedback logic unit to respectively adjust a high or low gross resistance value based on the counting value thereby to influence and adjust the electric potential and the wave shape of the said analog output signal to make the time segment high or low electric potential of the digital square wave signal be adjusted synchronously.