Temperature-compensated current reference circuit
US6809575B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 3, 2003 |
| Grant date | Oct 26, 2004 |
| Priority date | — |
| Expiry date | Apr 3, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/245
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A circuit comprises an amplifier having first output node comprising a first n-channel MOS transistor and a second output node comprising a second n-channel MOS transistor. A first p-channel MOS transistor is coupled to a supply potential, and the second output node. A first PNP bipolar transistor is coupled to the first p-channel MOS transistor through a first resistor and to the second n-channel MOS transistor and to ground. A second PNP bipolar transistor is coupled to the first p-channel MOS transistor through a second resistor in series with a third resistor and to ground. The first n-channel MOS transistor is coupled to a common node between the second and third resistors. A third n-channel MOS transistor is coupled to the first p-channel MOS transistor, to ground through a fourth resistor, and to either a reference potential or to the common node between the second and third resistors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.