Precision reference circuit and related method
US9726696B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Dec 21, 2012 |
| Grant date | Aug 8, 2017 |
| Priority date | — |
| Expiry date | Jun 8, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In one form, a reference circuit includes a measurement circuit and a determination circuit. The measurement circuit has an output for providing a ratio of a difference in base-to-emitter voltage (VBE) of a bipolar device at different current densities to a VBE of the bipolar device at a first current density. The determination circuit has an input coupled to the measurement circuit, and an output for providing a digital value of a parameter in response to the ratio. In another form, the reference circuit further includes a voltage generation circuit having an input coupled to the determination circuit, and an output, for modulating an analog voltage using the digital value to provide a reference voltage to the output, wherein the reference voltage is temperature compensated over a temperature range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.