Amplifiers – With semiconductor amplifying device – Including gain control means
Reexamination Certificate
2008-07-03
2010-11-02
Nguyen, Patricia (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including gain control means
C330S253000, C330S257000
Reexamination Certificate
active
07825730
ABSTRACT:
A bias circuit for the wireless transceiver is disclosed, which can be used for modulating the gain of the amplifier. The bias circuit comprises a first stage bias unit for receiving a constant current, a control voltage, and a first reference voltage and outputting a first outputting current, wherein the control voltage is used for controlling the value of the first outputting current, and further, the first outputting current can be increased or decreased by representing as an analog form, thus, the gain of the amplifier can be modulated according to the first outputting current, and the modulation of the gain can be represented as an analog form, such that the transient response occurred while the gain is modulated can be reduced.
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Wei Shu-Fen
Yang John-San
Airoha Technology Corp.
Muncy Geissler Olds & Lowe, PLLC
Nguyen Patricia
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