Bandgap reference circuit, control circuit, and associated method thereof
US10345847B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 23, 2018 |
| Grant date | Jul 9, 2019 |
| Priority date | — |
| Expiry date | Oct 23, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/26
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A bandgap reference circuit includes: a current generating circuit, a start-up circuit, a switch circuit, and a control circuit. The current generating circuit is arranged to generate a reference current according to a control signal on a control node. The start-up circuit is coupled to the current generating circuit and arranged to generate a trigger signal and output the trigger signal as the control signal when the bandgap reference circuit starts up. The switch circuit is coupled to the current generating circuit and arranged to generate a bandgap voltage according to the reference current, and the bandgap voltage is outputted to a regulator coupled to the bandgap reference circuit. The control circuit is coupled to the control node and the switch circuit and arranged to generate a switch control signal according to the trigger signal, and the switch control signal controls a switch status of the switch circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.