Bandgap reference circuit, control circuit, and associated control method
US10877505B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 2020 |
| Grant date | Dec 29, 2020 |
| Priority date | — |
| Expiry date | Apr 30, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/26
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A bandgap reference circuit includes a current generating circuit, a switch circuit and a control circuit. The current generating circuit is triggered by a trigger signal, generated when the bandgap reference circuit starts up, to mirror a base current to generate a first current and a second current. The current generating circuit is arranged to output the first current when triggered by the triggered signal. The switch circuit is controlled by a switch control signal to be selectively coupled between the current generating circuit and a terminal coupled to a regulator. The switch circuit is arranged to, when coupled between the current generating circuit and the terminal, allow the current generating circuit to output the second current to the terminal and accordingly provide a bandgap voltage. When the first current reduces to a predetermined level, the control circuit activates generation of the switch control signal to control the switch circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.