Reference current generating method and current reference circuit
US7589580B2 · kind B2 · utility
5Cited by
12References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 8, 2007 |
| Grant date | Sep 15, 2009 |
| Priority date | — |
| Expiry date | Jun 25, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/30
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Provided are a reference current generating method and a current reference circuit. The reference current generating method includes generating a first current using a NMOS transistor and a second current using a PMOS transistor, calculating a current difference between the first and second currents, generating a third current which has a similar current/temperature slope as the second current by multiplying the current difference by a proportional constant, and generating a reference current by subtracting the third current from the second current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.