Unity-gain current-limiting circuit

Details Unity-gain current-limiting circuit Unity-gain current-limiting circuit

1988-05-26

1989-07-25

Salce, Patrick R.

Electricity: power supply or regulation systems

In shunt with source or load

Using a three or more terminal semiconductive device

323303, 323312, 323908, 361 87, G05F 1613

Patent

active

048517593

ABSTRACT:
A highly accurate current-limiting circuit prevents an output current (I.sub.OUT) flowing through an output line (L.sub.OUT) from exceeding a specified value (I.sub.LIM) of an input current (I.sub.IN) flowing through an input line (L.sub.IN). The circuit contains a first channel device (10) controlled by a first reference voltage (V.sub.REF1), a current source (12) that supplies a reference current (I.sub.REF), a second channel device (14) controlled by a second reference voltage (V.sub.REF2), a current bypass device (16), and a bypass control system (18). The current gain below the specified value of the input current is close to one. By suitably choosing certain of the circuit parameters, the circuit operates in a substantially temperature-independent manner.

REFERENCES:
patent: 4219744 (1980-08-01), Shinn
patent: 4567537 (1986-01-01), Kalkhof et al.
patent: 4709163 (1987-11-01), Kasperkovitz
patent: 4727309 (1988-02-01), Vajdic et al.
patent: 4744369 (1988-05-01), Kroll
Soclof, Application of Analog Integrated Circuits (Prentice-Hall: 1985), pp. 35-42.

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