Wide-temperature integrated operational amplifier
US7514998B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 7, 2006 |
| Grant date | Apr 7, 2009 |
| Priority date | — |
| Expiry date | Feb 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.