Semiconductor amplifying apparatus and communication terminal ap

Details Semiconductor amplifying apparatus and communication terminal ap Semiconductor amplifying apparatus and communication terminal ap

1997-09-11

1999-10-05

Pascal, Robert

Amplifiers

Hum or noise or distortion bucking introduced into signal...

330297, 330302, H03F 126, H03F 304

Patent

active

059630892

ABSTRACT:
A semiconductor amplifying apparatus and a communication terminal apparatus to satisfy a standard value for adjacent channel power and amplify the power at a high efficiency. The value of an impedance viewed from an input terminal side of an impedance circuit network connected to an input terminal of a transistor is set at a value which causes a characteristic curve for a mutual modulation distortion component included in output power of the transistor to form, in the middle thereof, a curve section in which an inclination angle of a tangential line to this characteristic curve once becomes smaller, or a curve section which protrudes downwardly.

REFERENCES:
patent: 5710523 (1998-01-01), Kobayashi
patent: 5722063 (1998-02-01), Peterzell et al.

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