Telecommunications – Receiver or analog modulated signal frequency converter – Frequency or phase modulation
Patent
1978-05-31
1980-03-18
Griffin, Robert L.
Telecommunications
Receiver or analog modulated signal frequency converter
Frequency or phase modulation
455333, 455232, 455154, 307260, H04B 116
Patent
active
041941560
ABSTRACT:
An FM tuner comprising means for producing an intermediate frequency signal, a frequency discriminator circuit having "S" characteristics, a differential amplifier circuit, and detector means. The bias of said differential amplifier circuit is controlled in accordance with the direct current component of the output of said frequency discriminator circuit, and part of said intermediate frequency signal is passed to said detector means through said differential amplifier circuit, whereby that frequency position of said intermediate frequency signal which corresponds to the center of said direct current component is detected. Thus, it is possible to determine whether or not the FM tuner is in an optimum tuned state.
REFERENCES:
patent: 4103240 (1978-06-01), Sakabe
Chin Tommy P.
Griffin Robert L.
Shin-Shirasuna Electric Corp.
LandOfFree
FM tuner 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 tuner, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and FM tuner will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1125781