A comparator is provided to produce a coincidence pulse when the combination of respective stages of a first counter which counts a first clock pulse coincides with the combination of respective stages of a second counter which counts a lower second clock pulse. Furthermore, there is provided a flip-flop...http://www.google.fr/patents/US4236114?utm_source=gb-gplus-shareBrevet US4236114 - Apparatus for generating pulse width modulated waves
Apparatus for generating pulse width modulated waves
