Title:
Tunable Active Inductor

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Abstract
An active inductor capable of tuning a self-resonant frequency, an inductance, a Q factor, and a peak Q frequency by applying a tunable feedback resistor to a cascode-grounded active inductor is disclosed. The tunable active inductor includes a first transistor having a source connected to a power supply voltage and a gate connected to first bias voltage; a second transistor having a drain connected to a drain of the first transistor and a gate connected to a second bias voltage; a third transistor having a drain connected to a source of the second transistor and a source connected to a ground voltage; a fourth transistor having a drain connected to a gate of the third transistor, a source connected to the ground voltage and a gate connected to a third bias voltage; a fifth transistor having a source connected to the drain of the fourth transistor and a drain connected to the power supply voltage.
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Date Issued
8/7/2007
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