Low distortion amplifier
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United States of America Patent
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Aug 7, 2007
Grant Date -
Dec 8, 2005
app pub date -
Jun 8, 2005
filing date -
Jun 8, 2004
priority date (Note) -
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status (Latency Note)
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Abstract
A low distortion amplifier. The novel amplifier includes a first transistor Q1 having first and second output terminals and an input terminal adapted to receive an input signal, and a second transistor Q2 having first and second output terminals and an input terminal adapted to receive a signal from the first output terminal of Q1, wherein the second output terminal of Q1 is connected to the second output terminal of Q2 in order to eliminate a nonlinear current component in Q2. In an illustrative embodiment, the amplifier also includes a cascode Darlington pair Q3, Q4 for holding the second output terminals of Q1 and Q2 at a desired voltage to further reduce distortion and to maintain a wide bandwidth.
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