Precision MOS resistor
US5345118A · kind A · utility
6Cited by
9References
47Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 23, 1992 |
| Grant date | Sep 6, 1994 |
| Priority date | — |
| Expiry date | Apr 23, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/0002
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A precision resistor using MOS devices. The present invention utilizes an NMOS resistive element to simulate the resistor. A pair of PMOS source followers are implemented to control the value of the resistor and cancel the non-linearity due to the drain-source voltage V.sub.ds. A pair of NMOS source followers serve to eliminate non-linear distortions due to the "body effect" that can exist in the resistive element. The resistor circuit of the present invention provides higher precision, linearity and high value resistors in a smaller area than prior art MOS resistors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.