Patent ID: 6038255
Filing Date: 2000-03-14
Classification: H03K

Abstract:
A system for providing improved detection of data from a sequence of transmitted pulse width modulated (PWM) pulses received at a receiver, said PWM pulses including first pulses having a first duty cycle representing a logical zero and second pulses having a second duty cycle representing a logical one, said first and second duty cycles being subject to variation at said receiver, said system comprising:a duty cycle receiver which is responsive to first and second pulses that are initially received at said receiver for determining at least one of said first or said second duty cycles of said pulses initially received at said receiver; anda pulse detector coupled to said duty cycle receiver and having an adjustable critical duty cycle for distinguishing between first and second pulses that are received subsequent to said initially received first and second pulses based upon the respective first and second duty cycles of the subsequently received pulses, said critical duty cycle being adjusted based upon the duty cycle determined in said duty cycle receiver for at least one of said initially received first or second pulses.