Patent · US Active

Electronic circuit having band-gap reference circuit and start-up circuit, and method of starting-up band-gap reference circuit

US8816670B2 · kind B2 · utility

20Cited by

1References

18Claims

0Family size

Assignee

TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD. · TW

Inventors

Chia-Fu Lee · Hsinchu, TW
Chih-Feng Li · Zhubei City, TW

Key dates

Filing date	Sep 30, 2011
Grant date	Aug 26, 2014
Priority date	—
Expiry date	Jun 26, 2032

Classification

Technology area (CPC H)Electricity
CPC primaryH03F2203/45528
WIPO fieldControl
WIPO sectorInstruments

Abstract

An electronic circuit includes a band-gap reference circuit and a start-up circuit. The band-gap reference circuit includes an operational amplifier which has an output and first and second inputs. The band-gap reference circuit is configured to generate a predetermined reference voltage at the output of the operational amplifier after a start-up phase of the band-gap reference circuit. The start-up circuit includes at least one switch arranged to connect at least one current source to at least one of the inputs of the operational amplifier during the start-up phase, and to disconnect the at least one current source from the at least one of the inputs of the operational amplifier after the start-up phase.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.