Class AB output circuit with large swing
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United States of America Patent
Stats
-
Feb 11, 1986
Grant Date -
N/A
app pub date -
Jul 5, 1984
filing date -
Jul 5, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An output stage is disclosed wherein class AB bias is employed. The stage is quiescently biased by means of current mirrors so that the bias is controlled mainly by ratioed geometric elements. The output transistors are biased by means of unity gain common gate drivers that provide the desired level shifting. The output voltage can be swung from from close to the rail potential of the source of the n channel output transistor to close to the rail potential of the source of the p channel transistor. The circuit can drive relatively large load currents and can be fabricated using either CMOS or conventional bipolar integrated circuits.
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