Adjustable analog filter circuit with temperature compensation

Details Adjustable analog filter circuit with temperature compensation Adjustable analog filter circuit with temperature compensation

1990-08-13

1992-07-28

Westin, Edward P.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307556, 307491, 307310, 328167, H03K 500, G06G 710

Patent

active

051343185

ABSTRACT:
An analog voltage is input to a filter circuit. A time constant in the filter circuit is adjusted by a variable resistor arranged in a filter adjusting circuit. In addition, a time constant error in the filter circuit caused by a change in temperature can be compensated in accordance with a current value supplied from a filter compensation circuit. In the above-described filter compensation circuit, a potential difference proportional to an absolute temperature is generated, and a current value supplied to the filter circuit from the filter adjustment circuit is changed in accordance with the potential difference.

REFERENCES:
patent: 4699520 (1987-10-01), Wallenfang
patent: 4716315 (1987-12-01), Bell
patent: 4818903 (1989-04-01), Kawano
patent: 4851719 (1989-07-01), Hitomi
patent: 4883992 (1989-11-01), Koglin et al.
patent: 4888502 (1989-12-01), Jarrett

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