US 2021/0064071 A1 · POWER SUPPLY CIRCUITRY

Abstract

A power supply circuitry includes a first transistor, a feedback circuit, a first differential amplifier circuit, a second differential amplifier circuit, and a first control circuit. The first transistor outputs a power supply voltage based on a drive signal. The feedback circuit generates a feedback voltage of the power supply voltage. The first differential amplifier circuit amplifies a difference between the feedback voltage and a reference voltage, and outputs the drive signal. The second differential amplifier circuit amplifies a difference between the reference voltage and the feedback voltage. The first control circuit detects a change in the power supply voltage by using a differentiation circuit and controls the power supply voltage based on an output of the second differential amplifier circuit.

Claims11

Dependent claims

A power supply circuitry comprising:

a first transistor configured to output a power supply voltage based on a drive signal;
a feedback circuit configured to generate a feedback voltage of the power supply voltage;
a first differential amplifier circuit configured to amplify a difference between the feedback voltage and a reference voltage, and output the drive signal;
a second differential amplifier circuit configured to amplify a difference between the reference voltage and the feedback voltage;
and
a first control circuit configured to detect a change in the power supply voltage by using a differentiation circuit and control the power supply voltage based on an output of the second differential amplifier circuit.

3 more elements

A power supply circuitry comprising:

a first transistor configured to output a power supply voltage based on a drive signal;
a feedback circuit connected to an output of the first transistor, the feedback circuit configured to generate a feedback voltage of the power supply voltage;
a first differential amplifier circuit having a non-inverting terminal to which the feedback circuit is connected, an inverting terminal to which a reference voltage is applied, and an output connected to a drive terminal of the first transistor;
a second differential amplifier circuit having a non-inverting terminal to which the reference voltage is applied, and an inverting terminal connected to the feedback circuit;
and
an output voltage control circuit connected to an output of the second differential amplifier circuit, and having a differentiation circuit which detects a change in the power supply voltage based on the output of the second differential amplifier circuit, the output voltage control circuit configured to control the power supply voltage.

3 more elements

Dependencies are inferred from the claim text.

Power supply circuitry

Life of this patent

Power supply circuitry

Life of this patent

Abstract

Claims11