Method and circuit for providing a temperature dependent current source
US7288983B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 30, 2006 |
| Grant date | Oct 30, 2007 |
| Priority date | — |
| Expiry date | Aug 30, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/08
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A programmable temperature compensation circuit having a bandgap circuit for generating a first temperature-independent voltage reference signal, VREF and a second temperature-dependent voltage signal, VTEMP. A two-input buffer amplifier is coupled to the bandgap circuit for effecting impedance transformation between inputs and respective outputs thereof. A temperature dependent difference current (TDDC) is coupled to the outputs of the buffer amplifier for producing a temperature dependent current that is a function of a difference between first and second voltage signals at its inputs; and a current amplifier is coupled to the TDDC for adjusting a baseline current at room temperature and the temperature dependency slope of the temperature dependent current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.