Isolated Inputs, Non-Linear Low-Pass Filter for HALF-WAVE Rectified Signals Rejection
Original Publication Date: 1989-Dec-01
Included in the Prior Art Database: 2005-Jan-29
Disclosed is a circuit for rejecting half-wave rectified signals of frequency over a preset limit. Its input-output isolation along with its transient characteristics make it ideal for customer line identifi- cation process inside public central exchanges. More generally, the disclosed invention is suitable for use wherever significant voltage pulses are mixed with high frequency noise.