Parallel resonant circuit
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United States of America Patent
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Feb 7, 2017
Grant Date -
Jun 2, 2016
app pub date -
Feb 5, 2016
filing date -
Aug 8, 2013
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Abstract
A parallel resonant circuit with excellent distortion and saturation characteristics is provided at low power consumption. A first power-supply voltage is applied to the parallel resonant circuit. In the parallel resonant circuit, a variable resistor includes one or more parallel-connected branches. Each of the branches includes a series circuit of a resistor and a MOS switch. A second power supply supplies power of control signals applied to respective gates of the MOS switches, and supplies back gate voltages to the MOS switches. A power-supply voltage of the second power supply is higher than the first power-supply voltage.
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