Patent · US Active

Start-up circuits for starting up bandgap reference circuits

US8294450B2 · kind B2 · utility

5Cited by
1References
19Claims
0Family size

Assignee

Inventors

Key dates

Filing dateDec 28, 2009
Grant dateOct 23, 2012
Priority date—
Expiry dateJan 5, 2031

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG05F3/30
  • WIPO fieldControl
  • WIPO sectorInstruments

Abstract

An integrated circuit structure includes a bandgap reference circuit and a start-up circuit. The bandgap reference circuit includes a positive power supply node and a PMOS transistor including a source coupled to the positive power supply node. The start-up circuit is configured to be turned on during a start-up stage of the bandgap reference circuit, and to be turned off after the start-up stage. The start-up circuit includes a switch configured to interconnect a gate and a drain of the PMOS transistor during the start-up stage, and to disconnect the gate of the PMOS transistor from the drain of the PMOS transistor after the start-up stage.

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