Current sense amplifier circuit
US6469937B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 9, 2002 |
| Grant date | Oct 22, 2002 |
| Priority date | — |
| Expiry date | Jan 9, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C2211/5634
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A current sense amplifier circuit is provided with a reference current generator for generating a reference current according to the characteristics of a memory cell, and a current comparator, and the current comparator compares the memory cell current with the reference current. Thereby, the range of the operating power supply voltage is increased. Further, a current sense amplifier circuit is provided with plural sets of reference current generators and current comparators, and the reference current generators generate reference currents of different amounts corresponding to plural states the memory cell can take, and the current comparators compare the respective reference currents with the memory cell current. Therefore, it is possible to detect the current in the memory cell that is set in multiple states.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.