Telecommunications – Transmitter – Power control – power supply – or bias voltage supply
Reexamination Certificate
2007-11-01
2010-12-28
Trinh, Sonny (Department: 2618)
Telecommunications
Transmitter
Power control, power supply, or bias voltage supply
C455S127300, C455S253200
Reexamination Certificate
active
07860468
ABSTRACT:
A programmable variable gain amplifier includes at least three amplifiers. A first amplifier is configured to amplify an input signal. A second amplifier, which includes a programmable output load stage, is configured to receive an output signal from the first amplifier and to output a first differential output signal. The output load stage includes multiple first switches and multiple first diode-connected transistors that are open-circuited or short-circuited by the first switches. A third amplifier, which includes a programmable current mirror input stage, is configured to receive the first differential output signal from the second amplifier through the current mirror input stage and to output a second differential output signal. The current mirror input stage includes multiple second switches and multiple second transistors that are open-circuited or short-circuited by the plurality of second switches. The second transistors respectively form current mirrors with the first diode-connected transistors corresponding to the second transistors.
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Bae Jong-Dae
Choi Jeong-Hyun
Heo Jung-Wook
Ju Ho-Jung
Mun Hyun-Won
Samsung Electronics Co,. Ltd.
Trinh Sonny
Volentine & Whitt P.L.L.C.
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