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All-digital QPSK modulatorCircuit consisting to only four components (2 IC chips and 2 time delay devices) modulates RF signal with 2 asynchronous digital data signals. Digital modulator is virtually free of amplitude modulation, is not subject to temperature effects from other components, dissipates less power, and is far simpler than its analog predecessors.
Document ID
19790000320
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Burgess, R. W. (Hughes Aircraft Co.)
Julian, R. L. (Hughes Aircraft Co.)
Date Acquired
August 10, 2013
Publication Date
April 1, 1980
Publication Information
Publication: NASA Tech Briefs
ISSN: 0145-319X
Subject Category
Electronic Systems
Report/Patent Number
MSC-16922
Accession Number
79B10320
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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