Multiple bandwidth filter system for phase locked loop

Details Multiple bandwidth filter system for phase locked loop Multiple bandwidth filter system for phase locked loop

1989-06-26

1990-05-22

Grimm, Siegfried H.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Particular error voltage control

328167, 333174, H03H 2100, H03L 710

Patent

active

049280759

ABSTRACT:
A method and apparatus for combining a plurality of different filtering paths of varying bandwidth to provide selectable bandwidth signal filtering without transients caused by initialization of filter components. The signal to be filtered is applied to a plurality of parallel connected passband filters ranging from a widest passband filter to a narrowest passband filter. The bandwidth of the parallel filter combination is progressively narrowed by sequentially holding the output level of each of the filters in declining order of their passband frequency range, beginning with the widest passband filter, until all of the output levels of the filters are held constant except for the narrowest passband filter. This filter system is especially adapted for use as a loop filter in a phase locked loop control system incorporated in a data storage disc drive.

REFERENCES:
patent: 3909735 (1975-09-01), Anderson et al.
patent: 4319207 (1982-03-01), Gignoux

Affiliated with

Also associated with

Rating

Multiple bandwidth filter system for phase locked loop does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multiple bandwidth filter system for phase locked loop, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multiple bandwidth filter system for phase locked loop will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2136965