Electric circuit
US7348825B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 5, 2005 |
| Grant date | Mar 25, 2008 |
| Priority date | — |
| Expiry date | Aug 16, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45628
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A transistor has variation in a threshold voltage or mobility due to accumulation of factors such as variation in a gate insulating film which is caused by a difference of a manufacturing process or a substrate to be used and variation in a crystal state of a channel formation region. The present invention provides an electric circuit which is arranged such that both electrodes of a capacitance device can hold a voltage between the gate and the source of a specific transistor. Further, the present invention provides an electric circuit which has a function capable of setting a potential difference between both electrodes of a capacitance device so as to be a threshold voltage of a specific transistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.