Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1993-01-27
1994-08-16
Callahan, Timothy P.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307571, 307491, 318138, 388815, H03K 17687, H03K 301, H02K 2900
Patent
active
053389778
ABSTRACT:
A circuit for controlling a current in a load that includes an inductive component provides a high constant gain at low frequencies, a gain roll off at medium frequencies, and a low gain above unity gain at frequencies between the medium frequencies to high frequencies so that the gain roll off of the circuit to below unity gain is provided by a pole of the inductive load component. As a result, the circuit has a bandwidth limited only by the poles of the load. The circuit has a high gain amplifier with an input connected to receive a input control signal, and a low gain amplifier with an output connected to a control element of a switching element in a current path of the load. A frequency compensation circuit is connected between an output of the high gain amplifier and an input of the low gain amplifier, and includes a high frequency current bypass path and a resistor in series therewith operative to reduce the signal input to the low gain amplifier at high frequencies.
REFERENCES:
patent: 3947776 (1976-03-01), Stevens et al.
patent: 4441068 (1984-04-01), Smith
patent: 4712853 (1987-12-01), Howard
patent: 4739230 (1988-04-01), Sonobe et al.
patent: 4933614 (1990-06-01), Kawata
patent: 5004965 (1991-04-01), Otokawa et al.
IEEE Standard Dictionary of Electrical Terms, N.Y., N.Y. third ed., p. 108.
Bachand Richard A.
Callahan Timothy P.
Jorgenson Lisa K.
Robinson Richard K.
SGS-Thomson Microelectronics Inc.
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