Patent ID: 6992516

Claim:
A pulse duty cycle automatic correction device, comprising: a pulse width detector for detecting an input cycle pulse so as to generate a high level signal and a low level signal; a comparator encoder connected to the pulse width detector for generating a correction delay signal and an output selection signal; a delay circuit connected to the comparator encoder for receiving the input cycle pulse so as to output a delay cycle pulse; a compensation circuit for compensating the input cycle pulse so as to generate an input compensation pulse according to the difference delay beyond a correction delay time generated during the operation of the delay circuit; a logic circuit connected to the compensation circuit and the delay circuit for generating a greater duty cycle than the cycle pulse of the input cycle pulse and a smaller duty cycle than the cycle pulse of the input cycle pulse separately according to the input compensation pulse and the delay cycle pulse; and a multiplexer connected to the comparator encoder and the logic circuit for receiving the input cycle pulse so as to generate a cycle pulse with a proportional duty cycle; wherein the correction of a pulse cycle is obtained by acquiring a delay of time unit.