Demodulators – Amplitude modulation demodulator – Having specific distortion – noise or other interference...
Patent
1980-01-08
1982-09-07
Grimm, Siegfried H.
Demodulators
Amplitude modulation demodulator
Having specific distortion, noise or other interference...
329124, 375 94, H03D 300, H03K 900
Patent
active
043486410
ABSTRACT:
A recovery loop includes an analog circuit that mixes a fixed frequency signal from a temperature controlled oscillator (20) with an IF input to produce product signals corresponding to the quadrature components of data signals with frequency offset. A digital complex multiplier (32) is responsive to the product signals and to the output of a number controlled oscillator (34) to produce a digital output corresponding to the data signals. The output of the number controlled oscillator (34) is controlled by a digital phase lock loop.
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Andren Carl F.
Mosley, Jr. William H.
Scott Lex A.
Crowder, Jr. Albert M.
E-Systems Inc.
Grimm Siegfried H.
Westin Edward P.
Wilder Robert V.
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