Switch-around low noise amplifier
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United States of America Patent
Stats
-
Mar 9, 2010
Grant Date -
Dec 3, 2009
app pub date -
May 28, 2008
filing date -
May 28, 2008
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A switch-around low noise amplifier (LNA) device includes an input for receiving an input signal; an output for outputting an output signal; an LNA transistor coupled between the input and the output; a bypass switch circuit coupled between the input and the output; a current mirror circuit operatively connected to the LNA transistor to control a current flowing through the LNA transistor; a source follower switch operatively connected to the current mirror circuit to selectively turn on and off the current through the current mirror circuit in response to a mode select signal; and a driver adapted to selectively turn on and off the bypass switch circuit in response to the mode select signal. The LNA transistor receives the input signal at its control terminal, and one of the first and second terminals is directly connected to a supply voltage (e.g., ground).
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