Resistor circuit with DC voltage control

Details Resistor circuit with DC voltage control Resistor circuit with DC voltage control

1998-10-13

2000-10-03

Wambach, Margaret R.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific input to output function

With compensation

327345, 327564, 327566, G06G 712

Patent

active

061278777

ABSTRACT:
A resistor circuit having its impedance controlled by a DC voltage is provided. The resistor circuit includes a first resistor with an expected impedance. The circuit also includes a second resistor connected in series with a DC voltage controlled transistor. The first resistor is placed in parallel with the series connection of the second resistor and the transistor. Adjustments to the impedance of the circuit occur by adding or removing the impedances of the second resistor and transistor by varying the DC voltage applied to the transistor. In doing so, the impedance of the resistor circuit will be controlled to match a desired impedance regardless of the variations caused by the manufacturing process, operating temperature or operating power supply voltage.

REFERENCES:
patent: 5567977 (1996-10-01), Jimenez
patent: 5587696 (1996-12-01), Su et al.
patent: 5605859 (1997-02-01), Lee
patent: 5728615 (1998-03-01), Cheng et al.
patent: 5760729 (1998-06-01), Rumreich
patent: 5784692 (1998-07-01), Kleinberg

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