| CPC G01R 29/02 (2013.01) [G01R 19/16576 (2013.01)] | 17 Claims |
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1. A pulse edge detection circuit comprising:
a comparator configured to
compare a voltage signal with a threshold voltage, and
output a pulse signal, wherein one of a rise edge and a fall edge of the pulse signal is a first edge, wherein an other of the rise edge and the fall edge of the pulse signal is a second edge;
a first edge detection unit configured to output a first edge detection signal, which rises from a low level to a high level at a timing at which the first edge is generated; and
a second edge detection unit configured to output a second edge detection signal, which rises from a low level to a high level at a timing at which the second edge is generated,
wherein
a timing, at which the second edge detection unit is enabled to detect the second edge, is controlled by the first edge detection signal,
the first edge detection signal is configured to generate a rise edge when the voltage signal exceeds the threshold voltage, and
the second edge detection signal is configured to generate a rise edge when the voltage signal falls below the threshold voltage.
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