Reference generator for an integrated circuit
US5117177A · kind A · utility
Assignees
Inventor
Key dates
| Filing date | Jan 23, 1991 |
| Grant date | May 26, 1992 |
| Priority date | — |
| Expiry date | Jan 23, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/247
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A voltage reference generated for an integrated circuit which produces a source of reference voltage which is self-compensated for variations in operating voltage (V.sub.cc) or in transistor threshold voltages (V.sub.T). The circuit uses a voltage divider coupled between V.sub.cc and ground and has first and second FET transistors. A faced control circuit is coupled to control the conductivity of the first transistor, and the second control circuit is coupled to control the conductivity of the second transistor. The first control circuit produces a control voltage which varies as a function of variations in V.sub.cc, while the second control circuit also provides a control voltage wherein variations are a function of variations in V.sub.cc, but in an opposite direction. Hence, the second control voltage is configured so that variations in V.sub.cc cause the second transistor to compensate for changes in operation of the first transistor, so that the reference voltage remains substantially constant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.