AGC circuit for radio receiver having AGC sensitivity compensate

Details AGC circuit for radio receiver having AGC sensitivity compensate AGC circuit for radio receiver having AGC sensitivity compensate

1991-06-28

1994-08-16

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

4552452, 4552471, 455254, H04B 126

Patent

active

053394534

ABSTRACT:
An AGC circuit comprising a first level wave-detecting circuit for wave-detecting received signals having been band-limited, having a sensitivity being particularly high for a central frequency of a desired channel and a sensitivity being low for the other frequencies, and a second level wave-detecting circuit for wave-detecting received signals before the band-limitation having a sensitivity being constant irrespective of the frequency. Since the wave-detected signals of these two wave-detecting circuits are mutually added, it is possible to set an optimum detecting sensitivity by the first level wave-detecting signal against adjacent disturbances close to the central frequency of the desired channel, thereby effectively suppressing disturbance signals taking place when the respective intensities of the electric fields of adjacent channels are similar. Also, it is possible to set a constant detecting sensitivity by the second level wave-detecting signal against an intermodulation disturbance having a detuning degree over a predetermined value, thereby preventing an excessive sensitivity suppression of the frequency of the desired channel caused by an excessive AGC application.

REFERENCES:
patent: 4455681 (1984-06-01), Wile
patent: 4580288 (1986-04-01), Rinderle
patent: 4776040 (1988-10-01), Ichikawa et al.
"Bipolar Integrated Circuit for Car-Audio", '88 Sanyo Semiconductor Handbook, published on Mar. 1, 1988.
"Car Audio Bipolar Integrated Circuit", '88 Sanyo Semiconductor Data Book.
Patent Abstracts of Japan, vol. 4, No. 117 (E-22)(599) Aug. 20, 1980.
Patent Abstracts of Japan, vol. 8, No. 115 (E-24)(1552) May 29, 1984.
Patent Abstracts of Japan, vol. 9, No. 81 (E-307)(1804) Apr. 10, 1985.
"Development of One-Chip IC For Car Tuners", IEEE 1988 International Conference on Consumer Electronics, Digest of Technical Papers ICCE, Jun. 8-10, 1988, pp. 270-271.
"Advanced FM-IF", IEEE Transactions on Consumer Electronics, vol. CE-28, No. 3, Aug. 1982, pp. 383-392.

Affiliated with

Also associated with

Rating

AGC circuit for radio receiver having AGC sensitivity compensate does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with AGC circuit for radio receiver having AGC sensitivity compensate, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and AGC circuit for radio receiver having AGC sensitivity compensate will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-960517