Low power reference voltage generating circuit
US11422582B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 16, 2019 |
| Grant date | Aug 23, 2022 |
| Priority date | — |
| Expiry date | Dec 31, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/45192
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A reference voltage generating circuit includes a bandgap reference (BGR) circuit configured to output an active reference voltage at a first node according to a sample signal; a first charging circuit configured to charge a first capacitor using the active reference voltage according to the sample signal; a second charging circuit configured to charge a second capacitor using the active reference voltage according to the sample signal; and a comparing circuit configured to compare a voltage difference between a charge voltage of the first capacitor and a charge voltage of the second capacitor with a threshold value, wherein the sample signal is a pulse signal generated using an output of the comparing circuit and the charge voltage of the first capacitor is provided as a low power reference voltage in a low power operation mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.