Signal amplification circuit for amplifying and sensing current difference and semiconductor memory device including same
US6473343B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 23, 2001 |
| Grant date | Oct 29, 2002 |
| Priority date | — |
| Expiry date | Jul 23, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C16/28
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A signal amplification circuit according to the present invention includes a current comparison part for generating a voltage in accordance with the difference between the reference current and the memory cell current at the first node and an output level setting part for generating an output signal,at the second node. The output level setting part has the first transistor for supplying a constant current in accordance with the control voltage from the power supply node to the second node and the second transistor for allowing the current in accordance with the voltage of the node to flow from the second node to the ground node. The current which flows through the second transistor is designed to be in balance with the constant current under the condition where the reference current and the memory cell current are in balance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.