Class "B" type amplifier

Details Class "B" type amplifier Class "B" type amplifier

1980-01-21

1982-06-15

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330257, 330259, 330260, 330263, H03F 330, H03F 345

Patent

active

043353584

ABSTRACT:
A Class "B" amplifier circuit in which Class "B" conversion takes place in a converter portion of the circuit in combination with a differential amplifier input circuit, rather than in the output stage. The converter modulates the DC bias current supplied to the differential amplifier input circuit as a function of the input signal, in order to achieve Class "B" operation. The output amplifier portion of the circuit includes a pair of complementary, series-connected transistors, each of which is connected in a common-emitter configuration. The disclosed circuit provides a high input impedance and excellent dynamic range.

REFERENCES:
patent: 3622903 (1971-11-01), Steckler
patent: 3852676 (1974-12-01), Hongu et al.

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