Multiple loop radio frequency synthesizer

Details Multiple loop radio frequency synthesizer Multiple loop radio frequency synthesizer

1997-12-18

2000-09-05

Tsang, Fan

Telecommunications

Transmitter

Angle modulation

455113, 455118, 455126, 455 76, 332117, 327105, 327113, H04B 104

Patent

active

061155861

ABSTRACT:
A radio frequency synthesizer receives a relatively low frequency input signal and synthesizes from it a high frequency output signal whose frequency can be programmed to change in fine steps, for use e.g. in cordless telephone. The frequency synthesizer includes three linked phase locked loops with a single side band mixer in one embodiment coupling two of the phase locked loops together. This provides an output signal free of in-band frequency spurs within the spacing of two channels. The synthesizer can be integrated in a single chip with a narrowband FM modulation circuit. In spite of using a novel synthesizer to achieve monolithic integration, the user programming interface and control value equations are the industry standard format.

REFERENCES:
patent: 4528522 (1985-07-01), Matsuura
patent: 4602225 (1986-07-01), Miller et al.
patent: 4627099 (1986-12-01), Shimakata
patent: 5625324 (1997-04-01), Hsu et al.
patent: 5790942 (1998-08-01), LeCorre et al.

Affiliated with

Also associated with

Rating

Multiple loop radio frequency synthesizer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multiple loop radio frequency synthesizer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multiple loop radio frequency synthesizer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2221959