Telecommunications – Receiver or analog modulated signal frequency converter – Local control of receiver operation
Patent
1991-04-30
1993-08-31
Eisenzopf, Reinhard J.
Telecommunications
Receiver or analog modulated signal frequency converter
Local control of receiver operation
455256, 455264, 331 17, H04B 106, H04B 700, H03L 7093, H03L 7107
Patent
active
052417000
ABSTRACT:
The invention concerns a feedback control loop comprising a mixer comprising a first input receiving an electromagnetic signal, and a second input receiving a first local signal; an intermediate frequency line mounted between the output of the mixer and the input of a phase comparator which receives on a second input a second local signal and has an output; and a feedback line connected between this output and the second input of the input mixer, and comprising a loop filter controlling a variable oscillator for providing the said first local signal as well as a second variable oscillator for providing the second local signal. The loop filter comprises (i) a proportional section mounted between the output and the control input of a second variable oscillator; (ii) an integral variable section mounted between the output of the proportional section and the control input of the first variable oscillator; and controller capable of progressively changing the parameters of the proportional and integral sections so as to progressively reduce the bandwidth of the phase control system and to increase the filtering of the noise and of the interference signals superposed on to the electromagnetic signal.
REFERENCES:
patent: 4243941 (1981-01-01), Zdunek
patent: 4262361 (1981-04-01), Hauer
patent: 4559505 (1985-12-01), Suariz et al.
patent: 4635000 (1987-01-01), Swanberg
patent: 4980652 (1990-12-01), Tarusawa et al.
patent: 5036296 (1991-07-01), Yoshida
patent: 5068625 (1991-11-01), Baker et al.
Geesen Michel
Potier Thierry
Souty Patrick
Wozniak Daniel
Charouel Lisa
Dassault Electronique
Eisenzopf Reinhard J.
LandOfFree
Receiver of an electromagnetic signal with a known nominal frequ does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Receiver of an electromagnetic signal with a known nominal frequ, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Receiver of an electromagnetic signal with a known nominal frequ will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2305347