Work function based voltage reference
US8193589B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 8, 2010 |
| Grant date | Jun 5, 2012 |
| Priority date | — |
| Expiry date | Aug 12, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10D84/038
Abstract
A voltage reference is created from an operational amplifier circuit having two substantially identical P-channel metal oxide semiconductor (P-MOS) transistors with each one having a different gate dopant. The different gate dopants result in different threshold voltages for each of the two otherwise substantially identical P-MOS transistors. The difference between these two threshold voltages is then used to create the voltage reference equal to the difference. The two P-MOS transistors are configured as a differential pair in the operational amplifier circuit and the output of the operational amplifier is used as the voltage reference.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.