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Test for Phase Locked Loop And Wrap Test Using Phase Locked Loop for Test Signal

IP.com Disclosure Number: IPCOM000059393D
Original Publication Date: 1988-Sep-01
Included in the Prior Art Database: 2005-Feb-16

Publishing Venue

IBM

Related People

Authors:
Bui, MM [+details]

Abstract

A communications station has a receiver that is connected to an incoming line and a transmitter that is connected to an outgoing line. The receiver circuit uses a phase locked loop to extract timing information from the signal on the incoming line. The phase locked loop has a variable oscillator and a circuit for comparing the phase of the oscillator with the timing information extracted from the signal on the line. The oscillator frequency is adjusted to keep the oscillator in a selected phase relationship with the timing signal on the incoming line. These components are conventional.