Unity-gain current-limiting circuit
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United States of America Patent
Stats
-
Jul 25, 1989
Grant Date -
N/A
app pub date -
May 26, 1988
filing date -
May 26, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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