RF filter alignment using digital processor clock

Details RF filter alignment using digital processor clock RF filter alignment using digital processor clock

1990-09-14

1992-03-31

Kuntz, Curtis

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455197, 455254, 455340, H04B 116

Patent

active

051015099

ABSTRACT:
A variable frequency RF passband filter is calibrated to maximize the sensitivity of a radio receiver using reference frequencies applied based on the clock operation of a digital processor within the receiver. The reference frequency passing through the variable passband filter is mixed to the intermediate frequency of the receiver and its level is detected. A frequency counter verifies that a measureable reference frequency signal has in fact been mixed to the intermediate frequency in order to avoid errors. The correct control voltage signal for the variable passband filter corresponding to each receiver frequency can thus be conveniently and inexpensively determined and stored for use during normal operation of the receiver.

REFERENCES:
patent: 4232398 (1980-11-01), Gould et al.
patent: 4334323 (1982-06-01), Moore
patent: 4368541 (1987-08-01), Maier
patent: 4402089 (1983-08-01), Knight et al.
patent: 4481673 (1984-11-01), Muterspaugh
patent: 4590611 (1986-05-01), Maier et al.
patent: 4685150 (1987-08-01), Maier
patent: 4736456 (1988-04-01), Maier
patent: 4742564 (1988-05-01), Dumont
patent: 4792993 (1988-12-01), Ma
patent: 4905306 (1990-12-01), Anderson
patent: 4919640 (1990-04-01), Yanagibori
patent: 4926497 (1990-05-01), Shirley, Jr. et al.

Affiliated with

Also associated with

Rating

RF filter alignment using digital processor clock does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with RF filter alignment using digital processor clock, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and RF filter alignment using digital processor clock will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2266174