Level conversion of AC or DC voltage with noise rejection and low power consumption

摘要

An input voltage UIN to a voltage level converter 10 having a high input impedance charges a storage element which periodically discharges current to an LED 16 which periodically provides a light pulse for generating a level converted version of the input voltage UIN. A resistor Rp 22 connected to the storage element allows the storage element to discharge noise voltage spikes in the input voltage UIN.