Patent ID: 9733281
Date: 2017-08-15
CPC Classifications: G01R

Claim:
1. A voltage sensor system for sensing voltage in a conductor, the voltage sensor system comprising: a first plate; a first electrode corresponding to and disposed a first distance away from the first plate; a second plate; a second electrode corresponding to and disposed a second distance away from the second plate; a control unit structured to control one of the first plate and the second plate to be grounded and the other of the first plate and the second plate to be electrically floating; an inverting buffer electrically connected between the control unit and the second plate; and a differential amplifier electrically connected to the first electrode and the second electrode and being structured to output an output voltage that is proportional to a difference in voltage between the first electrode and the second electrode, wherein the control unit includes an output that is directly electrically coupled to the first plate and is electrically coupled to the second plate via the inverting buffer such that a single signal provided at the output of the control unit controls both one of the first plate and the second plate to be grounded and the other of the first plate and the second plate to be electrically floating.