Patent ID: 9383391
Filing Date: 2016-07-05
CPC Classification: G01R,H03M

Claim Text:
1. A voltage sensing circuit, comprising: a first differential amplifier receiving a first input voltage and a first reference voltage and providing a first current and a second current according to a difference between the first input voltage and the first reference voltage; a second differential amplifier receiving a second input voltage and a second reference voltage and providing a third current and a fourth current according to a difference between the second input voltage and the second reference voltage; and a buffer coupled to the first differential amplifier and the second differential amplifier and generating an output voltage based on the first current, the second current, the third current, and the fourth current, wherein the buffer generates the output voltage based on a pull-up current received by an input end of the buffer and a pull-down current provided by the input end of the buffer, the pull-up current is equal to the second current plus the fourth current, and the pull-down current is equal to the first current plus the third current.