Threshold extracting method and circuit using the same
US5952874A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 1995 |
| Grant date | Sep 14, 1999 |
| Priority date | — |
| Expiry date | Dec 19, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/262
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A transistor threshold extraction circuit having an output and including a first and a second transistor of the same type each having a control terminal and having essentially the same threshold voltage, the control terminal of the first transistor being connected to a constant potential node, a current mirror having at least one input terminal and one output terminal coupled respectively to said first and second transistors to provide bias currents, a first and a second potential reference, and a voltage divider having an intermediate tap and first and second end terminals. The control terminal of the second transistor is coupled to the intermediate tap and the divider is biased by coupling the first and the second end terminals respectively to the first and second potential references. The output is coupled to one of said end terminals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.