Amplifiers – Including a push-pull stage
Patent
1993-04-27
1994-11-08
Sikes, William L.
Amplifiers
Including a push-pull stage
330149, 330290, 330151, H03F 328, H01H 714
Patent
active
053630564
ABSTRACT:
An electronic circuit provides a linear output from an amplifying device, such as a hybrid push-pull amplifier, which has inherent distortion. In a preferred embodiment, the distortion of the hybrid amplifier is compensated by nesting a pair of hybrid push-pull amplifiers within a push-pull circuit configuration. In another embodiment, the distortion of the hybrid amplifier is compensated by providing a predistorted signal equal in magnitude, but opposite in sign, to the distortion introduced by the nonlinear device. The input signal is split into two electrical paths with the primary part of the signal applied directly to the hybrid amplifier, with a time delay to compensate for delay in the secondary path. Elements within the secondary path generate both even and odd order distortion products. These are recombined with the primary signal in proper phase and amplitude, and the resulting signal is applied to the hybrid amplifier for canceling distortion in the hybrid amplifier.
REFERENCES:
patent: 3422368 (1969-01-01), Julie
patent: 3571742 (1971-03-01), Wengenroth
patent: 3665333 (1972-05-01), Yastrov
patent: 5017886 (1991-05-01), Geller
Abraham Fetsum
Ortel Corporation
Sikes William L.
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