Low power class A amplifier circuit

Details Low power class A amplifier circuit Low power class A amplifier circuit

1999-02-03

2000-10-24

Pascal, Robert

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330261, H03F 345

Patent

active

061373613

ABSTRACT:
A low power class A amplifier circuit for driving the output load terminal with current source and sink circuits. Based upon an internally generated control signal, the output sinking current conducted by the current sink circuit remains constant regardless of input signal level and output load resistance, while the output sourcing current provided by the current source circuit varies in relation to the input signal and output load resistance. Hence, the output source current increases and decreases as the input signal increases and decreases and as the output load resistance decreases and increases, respectively. This results in reduced output "standby" current, thereby reducing the "standby" power dissipation of the circuit during no, or low, output load conditions.

REFERENCES:
patent: 4607232 (1986-08-01), Gill, Jr.
patent: 4667164 (1987-05-01), Doluca
patent: 5442319 (1995-08-01), Seesink et al.
patent: 5515006 (1996-05-01), Chan
patent: 5841317 (1998-11-01), Ohmori et al.

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