Quadrature modulation circuit for use in a radio transmitter

Details Quadrature modulation circuit for use in a radio transmitter Quadrature modulation circuit for use in a radio transmitter

1993-08-23

1995-07-18

Chin, Stephen

Pulse or digital communications

Transmitters

375308, 332103, 331 46, H04L 2704, H04L 2720

Patent

active

054348870

ABSTRACT:
A quadrature modulation circuit is comprised of two frequency generators which generate a first frequency signal and a second frequency signal, respectively, and a mixer which mixes the first frequency signal and the second frequency signal to generate the carrier wave whose frequency is different from both the first frequency and the second frequency. By the quadrature modulation of this carrier wave according to a baseband signal, a transmission wave can be obtained. Since the first frequency differs from the carrier frequency and the second frequency differs from both the carrier frequency and the first frequency, the output signals of the frequency generators are not affected by the transmission wave.

REFERENCES:
patent: 3031527 (1962-04-01), Barton et al.
patent: 4259744 (1981-03-01), Junod et al.
patent: 4395776 (1983-07-01), Naito et al.
patent: 4882552 (1989-11-01), Harris
patent: 5065408 (1991-11-01), Gillig
patent: 5073973 (1991-12-01), Ylivakeri
"McGraw-Hill Dictionary of Scientific and Technical Terms", second edition, 1978.

Affiliated with

Also associated with

Rating

Quadrature modulation circuit for use in a radio transmitter does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Quadrature modulation circuit for use in a radio transmitter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quadrature modulation circuit for use in a radio transmitter will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2421579