Circuit for generating a temperature-compensated voltage reference, in particular for applications with supply voltages lower than 1V
US8120415B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 12, 2009 |
| Grant date | Feb 21, 2012 |
| Priority date | — |
| Expiry date | Sep 27, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/30
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An embodiment of a circuit is described for the generation of a temperature-compensated voltage reference of the type comprising at least one generator circuit of a band-gap voltage, inserted between a first and a second voltage reference and including an operational amplifier, having in turn a first and a second input terminal connected to an input stage connected to these first and second input terminal and comprising at least one pair of a first and a second bipolar transistor for the generation of a first voltage component proportional to the temperature. The circuit also comprises the control block connected to the generator circuit of a band-gap voltage in correspondence with at least one first control node which is supplied with a biasing voltage value comprising at least one voltage component which increases with the temperature for compensating the variations of the base-emitter voltage of the first and second bipolar transistors and ensure the turn-on of a pair of input transistors of the operational amplifier. The circuit has an output terminal suitable for supplying a temperature-compensated voltage value obtained by the sum of the first voltage component proportional t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.