Radio-frequency power amplifier apparatus and method of...

Amplifiers – With semiconductor amplifying device – Including gain control means

Reexamination Certificate

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C330S133000, C330S310000

Reexamination Certificate

active

07378909

ABSTRACT:
By using a radio-frequency power amplifier which turns off an Nth stage radio-frequency amplifying transistor when the level of radio-frequency output power falls below a predetermined value, it is possible to improve the linearity when the level of the radio-frequency output power is so low.

REFERENCES:
patent: 6701134 (2004-03-01), Epperson
patent: 6701138 (2004-03-01), Epperson et al.
patent: 7123094 (2006-10-01), Tahara et al.
patent: 2004-501527 (2004-01-01), None

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