Amplifiers – With control of power supply or bias voltage – With control of input electrode or gain control electrode bias
Reexamination Certificate
2005-05-31
2005-05-31
Jeanglaude, Jean (Department: 2819)
Amplifiers
With control of power supply or bias voltage
With control of input electrode or gain control electrode bias
C330S133000
Reexamination Certificate
active
06900694
ABSTRACT:
The number of components of a high frequency power amplifier is reduced. A bias resistance ratio is adjusted in accordance with a change in the threshold voltage Vth of a transistor. A high frequency power amplifier has a plurality of amplifying systems. Each of these systems has an input terminal to which a signal to be amplified is supplied, an output terminal, a bias terminal, a plurality of amplifying stages which are sequentially cascaded between the input and output terminals, and a bias circuit connected to the bias terminal and each of the amplifying stages to apply a bias potential to the amplifying stage. The amplifying stage includes a control terminal for receiving an input signal and the bias potential supplied to the stage and a first terminal for transmitting an output signal of the stage.
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Adachi Tetsuaki
Akamine Hitoshi
Maruyama Masashi
Sato Takahiro
Suzuki Masashi
Jeanglaude Jean
Mattingly ,Stanger ,Malur & Brundidge, P.C.
Nguyen Linh V
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