Patent ID: 8493056

Claim:
A method of measuring a high voltage AC signal with a voltage measurement circuit including a capacitive divider circuit and a compensator circuit, the capacitive divider circuit including: first and second inputs; and first, second and third capacitors, a first plate of the first capacitor being electrically connected to the first input and a second opposing plate of the first capacitor being electrically connected to a first plate of the third capacitor, a first plate of the second capacitor being electrically connected to the second input and a second opposing plate of the second capacitor being electrically connected to a second plate of the third capacitor, the plates of each of the first, second and third capacitors being defined by conductive layers of a printed circuit board and the dielectric of each of the first, second and third capacitors being defined by a non-conducting part of the printed circuit board, the compensator circuit having a configurable transfer function and including: an input electrically connected across the first and second plates of the third capacitor; and an output, the method including: applying a known voltage signal across the first and second inputs to the capacitive divider circuit; measuring a voltage across the first and second plates of the third capacitor; determining a transfer function that would be operative to change the measured voltage such that it corresponds to a desired voltage across the first and second plates of the third capacitor based upon relative, ideal impedances of the first, second and third capacitors; configuring the compensator circuit with the determined transfer function; and measuring a high voltage AC signal with the voltage measurement circuit, such that the compensator circuit is operative to change a voltage received at its input in accordance with the determined transfer function and to provide the changed voltage at its output.