Electronic biasing circuit for constant transconductance
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United States of America Patent
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Dec 1, 2015
Issued Date -
Sep 24, 2015
app pub date -
Jun 8, 2015
filing date -
Jun 8, 2015
priority date (Note) -
Withdrawn
status (Latency Note)
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Abstract
An electronic biasing circuit provides a DC bias voltage to a circuit to be biased. The biasing circuit has a first transistor and a second transistor. A gate of the first transistor is connected to a gate of the second transistor and supplies the DC bias voltage. A source of the first transistor is connected to a supply reference voltage. A source of the second transistor is connected to the supply reference voltage via a resistor element. The currents flowing through the first and second transistor are forced to be equal. A third transistor is connected in series with the first transistor and a fourth transistor is connected in series with the second transistor. Currents flowing through the third and fourth transistors are forced to be equal.
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