Amplifiers – With semiconductor amplifying device – Including differential amplifier
Patent
1980-12-05
1983-08-30
Mullins, James B.
Amplifiers
With semiconductor amplifying device
Including differential amplifier
330257, H03F 345
Patent
active
044019505
ABSTRACT:
A low-voltage, complementary symmetry amplifier arrangement is disclosed which functions effectively on supply voltages down to one volt DC. The amplifier is especially suited for audio processing applications in hand-held personal electronics apparatus, such as pocket radio receivers. The circuit configuration is easily implemented in integrated circuit form and operates efficiently on class B operation with its attendant advantages. The amplifier arrangement is characterized by the use of current sources in the collector and emitter circuits of a differential amplifier and thereby employs current ratios instead of the more conventional voltage levels to selectively control the conduction of associated output devices.
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Gillman James W.
Motorola Inc.
Mullins James B.
Southard Donald B.
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