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US 10,474,173 B2Granted
Voltage regulator having a phase compensation circuit
AssigneeAblic Inc.
InventorShingo Nakashima
Life of this patent
Estimating the term…
Abstract
A voltage regulator is equipped with the first and the second source-grounded amplifier circuits connected to an output terminal of a differential amplifier circuit; a phase compensation circuit having a resistor part and a capacitor part, and connected between an output terminal of the first source-grounded amplifier circuit and an output terminal of the second source-grounded amplifier circuit; and an output transistor connected to the output terminal of the second source-grounded amplifier circuit. At least one of the resistor part and the capacitor part of the phase compensation circuit has a filter.
Claims5
A voltage regulator, comprising:
- a differential amplifier circuit configured to amplify a difference between a reference voltage and a feedback voltage both provided to the differential amplifier circuit, and to supply an amplified difference;
- a first source-grounded amplifier circuit connected to an output terminal of the differential amplifier circuit;
- a second source-grounded amplifier circuit connected to the output terminal of the differential amplifier circuit;
- a phase compensation circuit having a resistor part and a capacitor part, and connected between an output terminal of the first source-grounded amplifier circuit and an output terminal of the second source-grounded amplifier circuit;
- and
- an output transistor connected to the output terminal of the second source-grounded amplifier circuit,
- at least one of the resistor part and the capacitor part in the phase compensation circuit including a filter, and wherein the capacitor part includes a first capacitor and a second capacitor connected in parallel, and the filter comprises a low-pass filter connected in series to the second capacitor, the low pass filter comprising a resistor and a third capacitor having a terminal connected to ground.
4 more elements
A voltage regulator comprising:
- a differential amplifier circuit configured to amplify a difference between a reference voltage and a feedback voltage both provided to the differential amplifier circuit, and to supply an amplified difference;
- a first source-grounded amplifier circuit connected to an output terminal of the differential amplifier circuit;
- a second source-grounded amplifier circuit connected to the output terminal of the differential amplifier circuit;
- a phase compensation circuit having a resistor part and a capacitor part, and connected between an output terminal of the first source-grounded amplifier circuit and
- an output terminal of the second source-grounded amplifier circuit;
- and
- an output transistor connected to the output terminal of the second source-grounded amplifier circuit,
- at least one of the resistor part and the capacitor part in the phase compensation circuit including a filter;
- wherein the capacitor part of the phase compensation circuit includes a first capacitor and a second capacitor connected in parallel, and the filter comprises a low-pass filter connected in series to the second capacitor, the low pass filter comprising a resistor and a third capacitor having a terminal connected to ground.
6 more elements
A voltage regulator comprising:
- a differential amplifier circuit configured to amplify a difference between a reference voltage and a feedback voltage both provided to the differential amplifier circuit, and to supply an amplified difference;
- a first source-grounded amplifier circuit connected to an output terminal of the differential amplifier circuit;
- a second source-grounded amplifier circuit connected to the output terminal of the differential amplifier circuit;
- a phase compensation circuit having a resistor part and a capacitor part, and connected between an output terminal of the first source-grounded amplifier circuit and an output terminal of the second source-grounded amplifier circuit;
- an output transistor connected to the output terminal of the second source-grounded amplifier circuit,
- at least one of the resistor part and the capacitor part in the phase compensation circuit having a filter, and
- wherein the resistor part of the phase compensation circuit includes a first resistor and a second resistor connected in parallel, and a low-pass filter connected in series to the second resistor.
4 more elements
Dependencies are inferred from the claim text.