Modulators – Amplitude modulator – Nonlinear device controlled by modulating signal
Patent
1981-12-24
1986-04-01
LaRoche, Eugene R.
Modulators
Amplitude modulator
Nonlinear device controlled by modulating signal
332 48, 332 31R, 455108, H03C 100
Patent
active
045801118
ABSTRACT:
An amplitude modulator (10) is disclosed which generates an amplitude modulated carrier signal by selectively combining varying numbers of other carrier signals. A circuit (20) is included which provides plural carrier signals of like frequency and phase where the number of carrier signals being provided is dependent upon the level of an input signal. A combiner circuit (22) combines the plural carrier signals to thereby provide a combined signal which is the desired amplitude modulated carrier signal. In one embodiment (FIG. 3) the carrier signals which are combined are all equal in amplitude. In another embodiment (FIG. 4) the amplitudes of some of the carrier signals are weighted in a binary progression. In yet another embodiment (FIG. 9) the carrier signals are all frequency modulated whereby the output signal has both a varying frequency and amplitude.
REFERENCES:
patent: 3243728 (1966-03-01), Brainerd
patent: 3480881 (1969-11-01), Boykin
patent: 3585529 (1971-06-01), Darlington
patent: 3805191 (1974-04-01), Kawai et al.
patent: 3845392 (1974-10-01), Covill
patent: 3867643 (1975-02-01), Baker et al.
patent: 3969683 (1976-07-01), Fabricius
patent: 4156212 (1979-05-01), Covill
patent: 4162475 (1979-07-01), Fisher et al.
patent: 4164714 (1979-08-01), Swanson
patent: 4205241 (1980-05-01), Fisher et al.
patent: 4399558 (1983-08-01), Smollin
patent: 4403197 (1983-09-01), Swanson
Izumida, K. "Toshiba's 1-Tube 20/25 KW VHF TV and All Solid-State 5 KW AM Radio Transmitters Respond to User Demands" JEE, v. 18, n. 171, pp. 42-44 (Mar. 1981).
"Electronic Analog/Digital Conversions," (H. Schmid) Van Nostrand Reinhold Co., copyright 1970.
Harris Corporation
LaRoche Eugene R.
Pascal Robert J.
LandOfFree
Amplitude modulation using digitally selected carrier amplifiers does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Amplitude modulation using digitally selected carrier amplifiers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Amplitude modulation using digitally selected carrier amplifiers will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1086937