Accession Number : ADD001888

Title :   Two-Channel Phase-Locked Loop.

Descriptive Note : Patent,


Personal Author(s) : Yang,Joseph H ; Wolff,Stephen S

Report Date : 01 Jul 1975

Pagination or Media Count : 4

Abstract : The patent relates to a phase-lock loop for making the error signal to the voltage controlled oscillator (VCO) independent of the input signal amplitude. It comprises of first and second mixers to which an input signal is applied as one of the inputs, first and second low-pass filters to filter the outputs from the first and second mixers respectively, a divider to divide the filtered signal from the first mixer by the filtered signal from the second mixer, a non-linearity network to shape the divider output to a desired function, a VCO to take the non-linearity network output as its control signal and to provide a signal directly to the first mixer to be mixed with the input signal and indirectly through a 90 degree phase-shifter to the second mixer to be mixed with the input signal.

Descriptors :   *Phase locked systems, *Patents, Errors, Voltage controlled oscillators, Frequency, Tracking

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE