Amplifiers – With semiconductor amplifying device – Including particular biasing arrangement
Patent
1982-11-04
1985-02-12
Mullins, James B.
Amplifiers
With semiconductor amplifying device
Including particular biasing arrangement
330156, 330288, H03F 304
Patent
active
044994320
ABSTRACT:
An operational power amplifier having a bootstrap power output stage is designed to provide maximum dynamic range over a wide range of supply voltages. A control circuit in the form of a switched current mirror is added to the amplifier biasing circuit. At supply voltage higher than a predetermined threshold, the amplifier bias is adjusted to provide one half of this voltage at the output terminal. For supply voltages less than the threshold value, the output voltage is made less than half supply voltage.
REFERENCES:
patent: 4374335 (1983-02-01), Fukahori et al.
Gross William H.
Sakurai Tadashi
Mullins James B.
National Semiconductor Corporation
Pollock Michael J.
Wan G.
Winters Paul J.
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