Amplifiers – Combined with automatic amplifier disabling switch means
Reexamination Certificate
2008-04-07
2009-10-13
Choe, Henry K (Department: 2817)
Amplifiers
Combined with automatic amplifier disabling switch means
C330S285000
Reexamination Certificate
active
07602238
ABSTRACT:
An amplifier element amplifies RF signals. An emitter follower unit drives the amplifier element at a constant voltage corresponding to a reference voltage supplied to a reference terminal from outside. A current injection unit drives the amplifier element at a constant current corresponding to the reference voltage. An analog control unit analogically controls the output voltage of the emitter follower unit in correspondence with the control voltage supplied to a control terminal from outside. A mode switching unit switches whether the emitter follower unit is operated or not in correspondence with the control voltage.
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Yamamoto, K. et al., A CDMA InGaP/GaAs-HBT MMIC Power Amplifier Module Operating with a Low Reference Voltage of 2.4 V,IEEE Journal of Solid-State Circuits, 42(6):1282-1290 (2007).
Matsuzuka Takayuki
Yamamoto Kazuya
Choe Henry K
Leydig , Voit & Mayer, Ltd.
Mitsubishi Electric Corporation
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