Circuit for reducing transients by precharging capacitors

Details Circuit for reducing transients by precharging capacitors Circuit for reducing transients by precharging capacitors

1978-02-27

1980-01-22

Heyman, John S.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307246, 330107, H03K 110, H03K 1716

Patent

active

041852460

ABSTRACT:
A variable filter having a plurality of different loopwidths is disclosed. The variable filter, which is typically employed in a phase locked loop, includes a plurality of capacitors which are switchably coupled into and out of operation in the filter in order to change loopwidths. Those of the capacitors which are not currently operational in the filter are precharged so as to prevent loss of lock in the phase locked loop when switching to another loopwidth.

REFERENCES:
patent: 3673433 (1972-06-01), Kupfer
patent: 3725674 (1973-04-01), Schaeffer
patent: 3795877 (1974-03-01), Poole
patent: 4132908 (1979-01-01), Hughes

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