Patent ID: 8242770
Filing Date: 2012-08-14
Classification: G01R

Abstract:
1. A voltage sensing device that comprising: multiple voltage input nodes; a pair of sense input nodes; a switch part provided with multiple switches that turn connections between the voltage input nodes and the pair of sense input nodes on or off; a first sensed signal generating part that amplifies the voltage input to each of the pair of sense input nodes with a different gain and generates a first sensed signal according to a sum of or difference between amplification results; a control part that controls the switch part so that a pair of voltage input nodes is selected from the multiple voltage input nodes, and said selected pair of voltage input nodes and the pair of sense input nodes are connected in two patterns of different polarity; and a second sensed signal generating part that generates a second sensed signal according to the difference between the two first sensed signals generated by the first sensed signal generating part in the two connection patterns.