Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1982-10-20
1985-06-11
Miller, Stanley D.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307271, 328138, 328167, 330294, 330306, H03H 1112
Patent
active
045231095
ABSTRACT:
A filter circuit which operates as a substantially optimum integrating circuit comprises input and output terminals and a differential amplifier, the amplifier having an inverting input connected to the output via a series circuit including a first capacitor and a first resistor. The amplifier output is coupled via a series circuit of a second resistor and a second capacitor to a terminal carrying a reference voltage. The non-inverting input to the amplifier has a DC connection to the reference voltage terminal. One input to the filter circuit connects to the reference voltage terminal, the other filter circuit input being in circuit with the inverting input to the amplifier. The junction between the second resistor and the second capacitor connects to the filter circuit output terminal. The RC time constant of the first capacitor and the first resistor is substantially equal to the RC time constant of the second capacitor and the second resistor.
REFERENCES:
patent: 3564441 (1971-02-01), Eide
patent: 3824496 (1974-07-01), Hekimian
patent: 3886469 (1975-05-01), Rollett et al.
patent: 4051385 (1977-09-01), Greenaway et al.
patent: 4122417 (1978-10-01), Takasaki et al.
patent: 4458212 (1984-07-01), Brehmer et al.
Shepard, "Active Filters: Part 12--Short Cuts to Network Design", Electronics, Aug. 1969, pp. 82-92.
Hills, "Active Filters: Part 13--Narrowing the Choice", Electronics, Oct. 1969, pp. 105-111.
Briody Thomas A.
Hudspeth D. R.
Miller Stanley D.
Streeter William J.
U.S. Philips Corporation
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