Patent · US Active

Wide-temperature integrated operational amplifier

US7514998B2 · kind B2 · utility

3Cited by
8References
18Claims
0Family size

Assignee

Inventors

Key dates

Filing dateDec 7, 2006
Grant dateApr 7, 2009
Priority date
Expiry dateFeb 10, 2027

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH03F2203/45652
  • WIPO fieldBasic communication processes
  • WIPO sectorElectrical engineering

Abstract

The present invention relates to a reference current circuit. The reference circuit comprises a low-level current bias circuit, a voltage proportional-to-absolute temperature generator for creating a proportional-to-absolute temperature voltage (VPTAT), and a MOSFET-based constant-IC regulator circuit. The MOSFET-based constant-IC regulator circuit includes a constant-IC input and constant-IC output. The constant-IC input is electrically connected with the VPTAT generator such that the voltage proportional-to-absolute temperature is the input into the constant-IC regulator circuit. Thus the constant-IC output maintains the constant-IC ratio across any temperature range.

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