APPARATUS AND METHOD FOR VOLTAGE SENSING

摘要

A voltage measuring apparatus for use in an energy harvesting system is disclosed. The apparatus includes a capacitor (6) adapted to be charged by means of a voltage to be measured, and an asynchronous digital counter (12) having power supply terminals adapted to be selectively connected to the capacitor during discharge of the capacitor and to provide a digital output signal dependent upon the voltage level of the capacitor the start of discharging of the capacitor.