Voltage clamp circuit utilizing an active device

Details Voltage clamp circuit utilizing an active device Voltage clamp circuit utilizing an active device

1982-07-29

1984-11-06

Zazworsky, John

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307555, 307562, H03K 508

Patent

active

044814330

ABSTRACT:
A clamp circuit in which, so long as the input voltage ranges between preselected voltages +E and -E, the output voltage tracks the input voltage. When the input voltage goes beyond +E or -E, the output voltage is clamped to +E or -E. When, thereafter, the input voltage is changed in the opposite sense by X volts, where .vertline.X.vertline..ltoreq. 2E below its maximum value the output voltage changes by X volts.
The clamping circuit utilizes a differential amplifier and circuits providing two feedback paths between the output and inverting input of the amplifier, one or the other being operable dependent on the value of input signal to provide the clamping action described above.

REFERENCES:
patent: 3404348 (1968-10-01), Hansen et al.
patent: 3440557 (1969-04-01), Sundeen, Jr.
J. G. Graeme et al., "Operational Amplifiers, Design and Applications" McGraw-Hill Book Co., pp. 247-248, 1971.

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