Demodulators – Frequency modulation demodulator
Patent
1995-09-14
1996-11-05
Mis, David
Demodulators
Frequency modulation demodulator
329319, 329337, 455207, 455337, H03D 300
Patent
active
055721648
ABSTRACT:
An FM demodulator having two input terminals (11, 12), to which FM input signals having 90.degree. phase relation are applied, the said FM demodulator including a phase comparator (1) and a tunable, phase shifting circuit (2), the phase shifting circuit (2) being tuned by the FM demodulator output signal via a feedback path comprising a loop, filter. By adding a compensation filter (5) to the tuning control loop the phase shifting circuit is effectively cancelled from the tuning control loop, thereby making the tuning control loop independent of the bandwidth of the phase shifting circuit (2). Thus the bandwidth of the phase shifting circuit (2) can be reduced for threshold extension.
REFERENCES:
patent: 3611168 (1971-10-01), Haggai
patent: 3742361 (1973-06-01), Wason
patent: 4079330 (1978-03-01), Ishigaki et al.
patent: 4527276 (1985-07-01), Gutleber
patent: 4631487 (1986-12-01), Beech
patent: 4816770 (1989-03-01), Naumann
patent: 4914408 (1990-04-01), Voorman
patent: 5034695 (1991-07-01), Owen
patent: 5095536 (1992-03-01), Loper
patent: 5220686 (1993-06-01), Kasperkovitz et al.
patent: 5341107 (1994-08-01), Bijker et al.
Kasperkovitz Wolfdietrich G.
Kokke Robert F. E.
Goodman Edward W.
Mis David
U.S. Philips Corporation
LandOfFree
FM demodulator with threshold extension and receiver comprising does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with FM demodulator with threshold extension and receiver comprising , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and FM demodulator with threshold extension and receiver comprising will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2017456