Operational amplifier utilizing JFET followers
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United States of America Patent
Stats
-
Dec 15, 1987
Grant Date -
N/A
app pub date -
Dec 29, 1986
filing date -
Dec 29, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An operational amplifier includes a pair of differentially coupled PNP transistors driving a current mirror circuit. The base of the each of the transistors is coupled to the source of a JFET follower transistor each of which in turn has a gate coupled to one of the amplifier's inputs. First and second current sources are coupled to the source electrodes of each of the JFETs for the purpose of supplying a current thereto equal to that JFET's I.sub.DSS (its drain current when its gate and source are shorted).
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