Power amplifier

Amplifiers – With semiconductor amplifying device – Including push-pull amplifier

Reexamination Certificate

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Details

C330S297000, C330S264000, C330S271000

Reexamination Certificate

active

11091430

ABSTRACT:
A power amplifier includes an input circuit, three power supply lines with voltages successively decreasing in an order of first, second and third power supply lines, a push-side driving circuit and a pull-side driving circuit which receive control signals from the input circuit, three driving signal lines which are led out of the driving circuits, three output transistors which have current paths connected at one ends to the first, second and third power supply lines, and have gates connected to the three driving signal lines, respectively, an output terminal which is commonly connected to the other ends of the current paths of the output transistors, an impedance circuit which adjusts a gate impedance of the output transistor connected to the third power supply line, and a feedback circuit connected between the output terminal and the input circuit.

REFERENCES:
patent: 3887880 (1975-06-01), Leidich
patent: 4933645 (1990-06-01), Kasai
patent: 6107886 (2000-08-01), Kusakabe et al.
patent: 6157258 (2000-12-01), Adishian et al.
patent: 6198325 (2001-03-01), Ang et al.
patent: 6384684 (2002-05-01), Redman-White
patent: 11-284450 (1999-10-01), None
patent: 11-346126 (1999-12-01), None
patent: 2002-353746 (2002-12-01), None

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