Power amplifier module

A power amplifier module includes a first current source that outputs a first current corresponding to a level control voltage for controlling a signal level of an amplified signal, a second current source that outputs a second current corresponding to the level control voltage, a first transistor i...

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Bibliographische Detailangaben
Hauptverfasser: Ono, Seiko, Ishihara, Shota, Shimamune, Yusuke, Nakajima, Shizuki, Morisawa, Fuminori, Honda, Yuri, Koshio, Kazuhiro, Sato, Masato
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:A power amplifier module includes a first current source that outputs a first current corresponding to a level control voltage for controlling a signal level of an amplified signal, a second current source that outputs a second current corresponding to the level control voltage, a first transistor in which an input signal and a first bias current are supplied to a base and an emitter is grounded, a second transistor in which an emitter is connected to a collector of the first transistor, the second current is supplied to a base, and a first amplified signal obtained by amplifying the input signal is output from a collector, and a third transistor in which the first current is supplied to a collector, a bias control current or voltage is supplied to a base, and the first bias current is supplied from an emitter to the base of the first transistor.