Semiconductor device and electronic apparatus
US9454161B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 24, 2016 |
| Grant date | Sep 27, 2016 |
| Priority date | — |
| Expiry date | Feb 24, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2330/027
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Detection circuits cause a power supply circuit to start an initialization sequence by detecting abnormal behavior where an external power supply voltage is cut off, the power supply circuit generating a first internal power supply voltage from a first external power supply voltage and generating a second internal power supply voltage from a second external power supply voltage higher than the first external power supply voltage in terms of an absolute value, and an auxiliary amplifier that makes up for a drop in the first internal power supply voltage, using the second external power supply voltage as an operation power supply after detecting the abnormal behavior of the first external power supply voltage. A sample and hold circuit of a reference voltage of the auxiliary amplifier is configured in a hold state after detecting the abnormal behavior of the first external power supply voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.