Patent ID: 9479148
Filing Date: 2016-10-25
CPC Classification: H03K

Claim Text:
1. A method comprising: clamping, by a clamping circuit, a serial data signal between a first high voltage level and a first low voltage level, to yield a clamped serial data signal; comparing, by a first comparator circuit, the clamped serial data signal to a second high voltage level less than the first high voltage level, to yield a high output equal to one just when a voltage of the clamped serial data signal is greater than the second high voltage level; comparing, by a second comparator circuit, the clamped serial data signal to second low voltage level greater than the first low voltage level, to yield a low output equal to one just when the voltage of the clamped serial data signal is greater than the second low voltage level; and detecting, by an edge circuit, an edge of the serial data signal from the high output and the low output, wherein clamping the serial data signal comprises: