Patent ID: 7196563
Filing Date: 2007-03-27
Classification: H03K,H03M

Abstract:
1. A comparator which compares an input voltage and a reference voltage by using a plurality of inverting circuits connected in series, the comparator comprising: a main signal path which includes an input path in which an input voltage is supplied and an output path from which a result of comparison is output; a first inverting circuit which, provided in the main signal path, inverts and outputs a difference between the input voltage and the reference voltage; a second inverting circuit which, provided in the main signal path, further inverts and outputs the output of the first inverting circuit; a feedback path which, connected to the output path and the input path of the main signal path, feeds back the output of the second inverting circuit from the output path to the input path; and a capacitor which is arranged on the feedback path and causes hysteresis such that a first threshold at which the output of the second inverting circuit changes from high to low is different from a second threshold at which the output of the second inverting circuit changes from low to high.