Bandwidth control circuit for a phase locked loop

Details Bandwidth control circuit for a phase locked loop Bandwidth control circuit for a phase locked loop

1982-06-28

1985-03-19

LaRoche, Eugene R.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Particular error voltage control

331 25, 331DIG2, H03L 710

Patent

active

045062331

ABSTRACT:
Control signals for switching the bandwidth of a filter in a phase locked loop are provided by comparator circuits having time delays at their inputs that vary as a function of the magnitude of changes in the outputs from a phase comparator. These variable time delays permit the comparator circuits to produce an output having a duration of the proper length in order to permit the filter to have a large bandwidth for a long enough time to permit the phase locked loop to become locked.

REFERENCES:
patent: 4410861 (1983-10-01), Werner

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