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Continuous control of phase-locked-loop bandwidthTracking loop filter with continuous bandwidth control smooths transition from wide to narrow band. Circuit was designed for Space Shuttle where bandwidth varied between 320 Hz for acquisition and 20 Hz for tracking. Field-effect transitor (FET) acts as voltage controlled variable resistance, changing time constant of filter between phase detector and voltage-controlled oscillator in phase-locked loop.
Document ID
19800000008
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Motal, G. W.
(Lockheed Electronics Co., Inc.)
Vanelli, J. C.
(Lockheed Electronics Co., Inc.)
Date Acquired
August 10, 2013
Publication Date
August 1, 1980
Publication Information
Publication: NASA Tech Briefs
Volume: 5
Issue: 1
ISSN: 0145-319X
Subject Category
Electronic Components And Circuits
Report/Patent Number
MSC-16684
Accession Number
80B10008
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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