Signal conditioning circuit

Details Signal conditioning circuit Signal conditioning circuit

2004-09-23

2008-10-07

Le, Lana N. (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

C455S303000, C455S334000

Reexamination Certificate

active

07433667

ABSTRACT:
A signal conditioning circuit contains an oscillator which is connected to the inputs of two mixers. The output of one mixer is coupled, so as to form a feedback path, to a frequency divider circuit whose first output is coupled to the second input of the first mixer. A second signal output of the frequency divider circuit carries a signal with a phase shift of90degrees with respect to the signal at the first signal output of the frequency divider circuit. The second signal is supplied to a second input of the second mixer. Feedback results in undesirable signal components in the in-phase and quadrature components being suppressed. At the same time, the in-phase and quadrature components have a fixed phase relationship with respect to one another. The signal conditioning circuit allows desired non-integer division ratios to be achieved.

REFERENCES:
patent: 6785528 (2004-08-01), Carpineto
patent: 2006/0141972 (2006-06-01), Matsuno
patent: 102 11 524 (2003-05-01), None
patent: 0 594 403 (1994-04-01), None
Chapter 9 “Schaltwerke”, Halbleiter-Schaltungstechnik, U. Tietze and Ch. Schenk, Springer Publishing, New York, 1991, 38 pgs.

Affiliated with

Also associated with

Rating

Signal conditioning circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Signal conditioning circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Signal conditioning circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4000666