Bandgap reference circuit with startup circuit and method of operation
US9110486B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 6, 2012 |
| Grant date | Aug 18, 2015 |
| Priority date | — |
| Expiry date | Aug 1, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/30
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A band gap reference circuit including a band gap reference generator having an output for providing a reference voltage and a startup circuit for controlling current provided to the band gap reference generator when activated. The startup circuit includes a turnoff circuit having an output to deactivate the startup circuit to not control current to the band gap reference generator based on a voltage of the output of the band gap reference generator. The turnoff circuit includes an inverter having a first transistor of a first conductivity type in series with a second transistor of a second conductivity type opposite the first conductivity type. The startup circuit includes a body bias circuit connected to a body of the first transistor to provide a voltage differential between the body of the first transistor and a source terminal of the first transistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.