Telecommunications – Receiver or analog modulated signal frequency converter – Frequency modifying or conversion
Patent
1993-10-14
1995-06-27
Eisenzopf, Reinhard J.
Telecommunications
Receiver or analog modulated signal frequency converter
Frequency modifying or conversion
455209, 455264, H04B 116
Patent
active
054288363
ABSTRACT:
A radio receiver, and associated method therefor, for generating a baseband signal having signal component portions of time-varying frequencies. The oscillating signal generated by at least one of the local oscillators of down-mixing circuitry of the receiver is modulated by a low-frequency signal thereby to cause the resultant, baseband signal to be comprised of signal component portions of time-varying frequencies. Because the signal component portions of the baseband signal are of time-varying frequencies, attenuation of such signal component portions and resultant distortion of the received signal, as a result of undesirable notches in the frequency response of a radio receiver is avoided.
REFERENCES:
patent: 4551856 (1985-11-01), Victor et al.
patent: 4661995 (1987-04-01), Kashiwagi
patent: 4709407 (1987-11-01), Baba
patent: 4910800 (1990-03-01), Chung
patent: 5003621 (1991-03-01), Gailus
Johnson, Jr. Robert M.
Moller Paul J.
Sanecki Theodore T.
Eisenzopf Reinhard J.
Halling Dale B.
Motorola Inc.
Pham Chi H.
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