PARALLEL RESONANT CIRCUIT

摘要

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.

主权项

1. A parallel resonant circuit formed by connecting an inductor, a capacitor, and a variable resistor in parallel and connected to a first power supply, wherein
the variable resistor includes one or more parallel-connected branches, each of 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, and a power-supply voltage of the second power supply is higher than a power-supply voltage of the first power supply.