Amplifiers – With semiconductor amplifying device – Including particular biasing arrangement
Reexamination Certificate
2005-05-24
2005-05-24
Shingleton, Michael B (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including particular biasing arrangement
C330S310000, C330S311000, C330S289000, C330S272000, C330S273000, C330S267000
Reexamination Certificate
active
06897729
ABSTRACT:
An amplifier comprises a Low Noise Amplifier (LNA) that amplifies a Radio Frequency (RF) signal that includes a transconductance, a gain and an input stage that receives the RF signal. A bias assembly includes a bias circuit with a bias resistance and generates a bias current for the input stage of the LNA, which is related to the bias resistance. A shunt feedback stage amplifies an output of the input stage, generates an RF output and includes a shunt resistance. Changes in the bias resistance due to changes in conditions are substantially offset by changes in the shunt resistance due to the changes in conditions, which reduces variation of the gain of the LNA based on the changes in conditions.
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Jin Xiaodong
Tse Lawrence
Marvell International Ltd.
Shingleton Michael B
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