TIMING EXTRACTING CIRCUIT

摘要

PURPOSE:To reduce the number of constitution components, by generating a pulse string including a sine wave component with a cycle of 1/T by operating an FF at the time of inverting the polarity of a CMI signal from a low level to a high level. CONSTITUTION:An input CMI signal En sets the FF4 at the time of inverting the signal from the low level to the high level, and a pulse rises at the output of the FF4. Afterwards, after the lapse of a time T/2, the FF4 is reset by a delay signal En' that is the output of a delay circuit 3, and the pulse rises at the output of the FF4. In such a way, the pulse string Fn including the sine wave component of cycle T is generated at the output of the FF4. lt is possible to obtain the sine wave of cycle T at an output terminal 2 by passing the pulse string Fn through a band-pass filter 5.