Programmable temperature coefficient analog second-order curvature compensated voltage reference
US10290330B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 5, 2017 |
| Grant date | May 14, 2019 |
| Priority date | — |
| Expiry date | Dec 5, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C7/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An example voltage reference circuit includes: a reference circuit comprising a first circuit configured to generate a proportional-to-temperature current and corresponding first control voltage and a second circuit configured to generate a complementary-to-temperature current and corresponding second control voltage; a first current source coupled to a first load circuit, the first current source generating a sum current of the proportional-to-temperature current and the complementary-to-temperature current in response to the first and second control voltages, the first load circuit generating a zero temperature coefficient (Tempco) voltage from the sum current; and a second current source coupled to a second load circuit, the second current source generating the sum current of the proportional-to-temperature current and the complementary-to-temperature current in response to the first and second control voltages, the second load circuit generating a negative Tempco voltage from the sum current and the complementary-to-temperature current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.