Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1990-01-24
1991-05-21
Heyman, John S.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307520, 372 26, H01S 310
Patent
active
050178806
ABSTRACT:
Many prior control circuits inject a small amplitude control tone into the prime signal path where the distortion added to the prime or main signal by the control tone does not present a significant corruption of the prime signal. This control tone is detected and, based on the detected parameters, the prime signal is adjusted as to one of its parameters such as amplitude. If there are variable frequency spurious signals that may produce products within the bandwidth of the control system, the operation of the control circuit can be completely disrupted. The present invention overcomes the prior art problem by continuously sweeping the frequency of the control tone whereby the detection of the spurious signals in the operation of the control circuit occurs such a small percentage of the time that the control circuit can maintain reliable control operation.
REFERENCES:
patent: 4181892 (1980-01-01), Dilley
patent: 4328591 (1982-05-01), Baghdady
patent: 4682045 (1987-07-01), Amazawa et al.
patent: 4868836 (1989-09-01), Howard
patent: 4916705 (1990-04-01), Glance
patent: 4924470 (1990-05-01), Ries
Dugan John M.
Ries Gordon W.
Hamann H. Fredrick
Heyman John S.
Lutz Bruce C.
Rockwell International Corporation
Sewell V. Lawrence
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