Power circuit

Abstract

This technology stabilizes the output voltage even when electronic components in the power supply circuit degrade, extending the lifespan of devices that incorporate the power supply circuit. [Solution] The power supply device includes a first power supply circuit having a capacitor and a voltage generation unit that generates a first voltage according to the input voltage, and a voltage adjustment unit that adjusts the value of the first voltage generated by the voltage generation unit; a second power supply circuit connected to the output of the first power supply circuit and generating a second voltage based on the first voltage; and a voltage control circuit that detects fluctuations in the second voltage and, if the fluctuation exceeds a threshold, outputs a control signal to the voltage adjustment unit to increase the value of the first voltage.

Claims

[Claim 1] A first power supply circuit having a capacitor and a voltage generation unit that generates a first voltage according to the input voltage, and a voltage adjustment unit that adjusts the value of the first voltage generated by the voltage generation unit, A second power supply circuit connected to the output of the first power supply circuit and generating a second voltage based on the first voltage, A voltage control circuit that detects fluctuations in the second voltage and outputs a control signal to the voltage adjustment unit to increase the value of the first voltage when the fluctuation exceeds a threshold, A power supply device having the following features.

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