Disable circuit for a phase locked loop discriminator circuit

Details Disable circuit for a phase locked loop discriminator circuit Disable circuit for a phase locked loop discriminator circuit

1985-12-23

1986-08-12

LaRoche, Eugene R.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Transistorized controls

331 11, 331 17, H03L 706

Patent

active

046059083

ABSTRACT:
The present invention consists of an apparatus comprising a phase locked loop and a frequency loop having a discriminator and a disable. The disable is used to electrically disconnect the frequency loop from the phase locked loop when the phase of the output from the voltage controlled oscillator is within a preset range of the incoming signal. The disable acts to provide an adjusting voltage signal, set by the discriminator, to the phase locked loop when the output and input signal phases are out of the preset range. When they are within the preset range the disable outputs a zero voltage regardless of the input from the discriminator.

REFERENCES:
patent: 4000476 (1976-12-01), Walker et al.
patent: 4423390 (1983-12-01), Waters
patent: 4486717 (1984-12-01), Yamasaki

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