Vectorial signal combiner for generating an amplitude modulated

Details Vectorial signal combiner for generating an amplitude modulated Vectorial signal combiner for generating an amplitude modulated

1993-09-20

1994-09-06

Sikes, William L.

Amplifiers

Miscellaneous

Amplifier protection means

330124R, 330165, 330166, 330167, H03F 900, H03F 300, H03D 500, H03D 1300

Patent

active

053451899

ABSTRACT:
A circuit for combining first and second signals having the same frequency. The signals have a relative phase shift, 2a(t). The circuit generates a signal that is proportional to the sum or difference of signals. The circuit appears to be a resistive load; however, the circuit can be constructed from purely reactive circuit elements, and hence, does not dissipate energy. In one embodiment, the circuit is constructed from a transformer and two LC circuits in which the capacitance is varied in response to a(t). The circuit may be used to construct a high efficiency RF amplification stage.

REFERENCES:
patent: 2646472 (1953-07-01), Rockwell
patent: 3854100 (1974-12-01), Pouzadoux
patent: 4418320 (1983-11-01), Guyton
patent: 4439742 (1984-03-01), Sondermeyer

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