Regulator circuit and semiconductor integrated circuit device having the same
AssigneeFujitsu Limited
InventorsAtsushi Matsuda, Hirokazu Tanaka, Kunihiko Gotoh
Life of this patent
Estimating the term…
Abstract
A regulator circuit includes an output circuit outputting an output voltage based on a control voltage, a reference voltage generating circuit generating a reference voltage, an output voltage control circuit comparing the reference voltage with a voltage depending on the output voltage and producing the control voltage based on a comparison result, and a power supply circuit which supplies the reference voltage generating circuit and the output voltage control circuit with a first power supply voltage which is different from a second power supply voltage supplied to the output circuit.
Claims24
A regulator circuit comprising:
- an output circuit outputting an output voltage based on a control voltage;
- a reference voltage generating circuit generating a reference voltage;
- an output voltage control circuit comparing the reference voltage with a voltage depending on the output voltage and producing the control voltage based on a comparison result;
- and
- a power supply circuit which supplies the reference voltage generating circuit and the output voltage control circuit with a first power supply voltage which is different from a second power supply voltage supplied to the output circuit.
A semiconductor integrated circuit device comprising:
- a chip;
- a voltage regulator disposed on said chip;
- and
- an internal circuit supplied with voltage output from the voltage regulator,
- said voltage regulator comprising:
- an output circuit outputting said output voltage based on a control voltage;
- a reference voltage generating circuit generating a reference voltage;
- an output voltage control circuit comparing the reference voltage with a voltage depending on the output voltage and producing the control voltage based on a comparison result;
- and
- a power supply circuit which supplies the reference voltage generating circuit and the output voltage control circuit with a first power supply voltage which is different from a second power supply voltage supplied to the output circuit.
Dependencies are inferred from the claim text.