H - Electricity – 04 – B
Patent
H - Electricity
04
B
340/79
H04B 3/58 (2006.01) H02J 13/00 (2006.01) H04B 3/54 (2006.01)
Patent
CA 1288493
ABSTRACT OF THE DISCLOSURE An apparatus for controlling the output of a switching amplifier includes a signal dividing circuit which generates a delayed replica of the carrier signal and a doubled signal having twice the carrier frequency. The doubled signal is effective for establishing a second time delayed signal relative to the first time delayed signal. The first and second time delayed signals are logically operated on so that a three state output representing the carrier signal is attained. A summing amplifier utilizes the two time delayed signals to generate this three state output whereby if the two time delayed signals are out-of-phase, a zero voltage is connected to the drive portion of the switching amplifier thereby limiting the output of the switching amplifier.
569037
Melvin Waymon A. Jr.
Swabey Ogilvy Renault
Westinghouse Electric Corporation
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