Bandgap reference circuit
US7282988B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 14, 2005 |
| Grant date | Oct 16, 2007 |
| Priority date | — |
| Expiry date | May 26, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/30
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A bandgap reference circuit is proposed. To remove parasitic effects, this includes the combination of a first circuit section (1), which generates a temperature-proportional voltage, and a second circuit section (2), which generates an inversely temperature-proportional voltage. The bandgap reference circuit generates a bandgap reference voltage (Ubg) as the sum of the temperature-proportional voltage of the first circuit section (1) and the inversely temperature-proportional voltage of the second circuit section (2). To remove the parasitic effects, both circuit sections (1, 2) include bipolar transistor circuits with multiple bipolar transistors (Q1-Q4; Q5-Q8), so that both the temperature-proportional voltage and the inversely temperature-proportional voltage are generated in the form of a sum and difference formation of multiple base-emitter voltages of the appropriate bipolar transistors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.