Clamp limiter circuit with precise clamping level control

Details Clamp limiter circuit with precise clamping level control Clamp limiter circuit with precise clamping level control

1991-03-29

1992-06-02

Stephan, Steven L.

Electricity: power supply or regulation systems

Self-regulating

Using a three or more terminal semiconductive device as the...

307542, 307547, 307555, G05F 316

Patent

active

051190168

ABSTRACT:
A limiter/clamp circuit is described having a sharp bend in the clamp characeristic and a transition from its linear range to its clamp range that occurs over a desirably small voltage range. The sharp bend is achieved by a feedback loop consisting of plural transistor elements configured in a current "mirror" feedback structure. This circuit is based on achieving an exponential/logarithmic dependence of the voltages and currents in the feedback loop, which serve to control the feedback signal to the base of a 2-transistor clamping device. The circuitry also provides relatively symmetric clamping.

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patent: 4908526 (1990-03-01), Mefford
patent: 5015880 (1991-05-01), Drake et al.

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