Circuit for controlling current flow between two nodes

Details Circuit for controlling current flow between two nodes Circuit for controlling current flow between two nodes

1995-02-13

1996-09-03

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

Nonlinear amplifying circuit

330252, G06G 726

Patent

active

055527426

ABSTRACT:
A controllable resistance circuit (16, 20) changes effective resistance value in response to an external control signal. The control circuit uses a simple current steering mechanism (32, 34, 38, 40, 42, 44, 46, 48) through a fixed resistor (62) to allow uni-directional or bi-directional operation. When configured as a bi-directional device, both ends of the effective resistance circuit (18, 24) are high impedance and therefore float with respect to any power supply. The effective resistance can be set with the control voltage and adjusted with changing conditions.

REFERENCES:
patent: 4079238 (1978-03-01), Campe et al.
patent: 4306695 (1981-12-01), Campbell
patent: 4350956 (1982-09-01), DuPuy
patent: 5266852 (1993-11-01), Shigenari et al.

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