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US 10,951,228 B2Granted
Semiconductor apparatus
AssigneeRohm Co., Ltd.
InventorKohta Minamoto
Life of this patent
Estimating the term…
Abstract
A semiconductor apparatus is used together with a processor. An A/D converter is configured to be calibratable. A logic circuit periodically supplies a calibration trigger to the A/D converter by means of a count operation using the output of an oscillator.
Claims13
A semiconductor apparatus to be used together with a processor, the semiconductor apparatus comprising:
- an oscillator;
- an A/D converter structured to be calibrated;
- and
- a logic circuit structured to periodically supply a calibration trigger to the A/D converter by means of a count operation using an output of the oscillator,
- wherein, during suspension of the processor, the logic circuit generates the calibration trigger using the output of the oscillator,
- and wherein, during operation of the processor, the processor generates the calibration trigger for the A/D converter.
3 more elements
A power management circuit comprising:
- a power supply circuit structured to receive a voltage from a battery, and to generate a power supply voltage to be supplied to a processor;
- an A/D converter structured to convert a current that flows through the battery into a digital value, and to be calibratable;
- an RTC (Real Time Clock) circuit structured to always operate;
- and
- a logic circuit structured to execute a count operation using an output of the RTC circuit, to supply an A/D conversion trigger to the A/D converter with a first period, and to supply the calibration trigger to the A/D converter with a second period that is longer than the first period.
2 more elements
Dependencies are inferred from the claim text.