Low noise amplifier circuit with an isolating switch topology
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United States of America Patent
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Sep 12, 2000
Grant Date -
N/A
app pub date -
Nov 23, 1999
filing date -
Nov 23, 1999
priority date (Note) -
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Abstract
An amplifier/switch circuit includes a first circuit input, a second circuit input, a circuit output, an amplifier, a switching circuit and a DC blocking capacitor. The amplifier has an amplifier control input, a first amplifier output and a second amplifier output. The amplifier control input is connected to the first circuit input. The first amplifier output is connected to the second circuit input. The second amplifier output is connected to the circuit output. A switching circuit has a switch control input, a switch input and a switch output. The switch control input is connected to the circuit output. The control input is connected to the second circuit input. The DC blocking capacitor is connected between the amplifier control input of the first transistor and the switch input.
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