Linear RF power amplifier with optically activated switches
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United States of America Patent
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May 7, 2002
Grant Date -
N/A
app pub date -
Oct 31, 1997
filing date -
Oct 31, 1997
priority date (Note) -
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Abstract
A linear power amplifier amplifies a linear baseband signal having I and Q components. An up-converting mixer uses optically activated switches to mix the amplified baseband signal with a local oscillator signal at specified carrier frequency. The optically activated switches are activated according to a switching sequence that produces a constant impedance over each carrier frequency cycle. In this way, the optically activated switches prevents introduction of non-linearities during the up-conversion process.
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