Current regulation circuit

Details Current regulation circuit Current regulation circuit

2007-01-09

2007-01-09

Patel, Rajnikant B. (Department: 2838)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

C327S427000, C361S079000, C361S086000, C361S092000

Reexamination Certificate

active

10860447

ABSTRACT:
A method and circuit for providing a regulated current to a load stabilized with respect to the load current, a load voltage, and a circuit temperature. The circuit includes a power pass device, a current sense device, a voltage sense amplifier, a reference device, a temperature sense device, and a current control device. In one embodiment, the current control device receives a first signal based on the sensed load current, a second signal based on the sensed load voltage, a third signal based on the circuit temperature, and a reference signal. A lesser of the second, third, and reference signals is selected and differentially combined with the first signal. A control signal is derived from the combination to control a regulation of the load current. In a further embodiment, an external signal may be provided to the current control device for stabilization with respect to an external parameter.

REFERENCES:
patent: 5696435 (1997-12-01), Koenck
patent: 5796278 (1998-08-01), Osborn et al.
patent: 6233128 (2001-05-01), Spencer et al.
Linear Technology Corporation. Nd. “150mA Standalone Linear Li-Ion Battery Charger in ThinSOT.” 16pp.

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