Differential sense amplifier latch for high common mode input
US7193447B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 6, 2004 |
| Grant date | Mar 20, 2007 |
| Priority date | — |
| Expiry date | May 6, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45681
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A sense amplifier latch that is operable to interface with high common-mode input voltages with wide ranges for all process variations. The sense amplifier latch comprises a cross-coupled latch having first and second rail signals; a pre-charge device; an equalization device; pass devices for enabling input devices to receive pad and reference inputs. In the present invention, the input devices comprise push-pull impedance dividers are used to preserve the input difference voltage while dramatically lowering the common-mode output voltage. The outputs of the impedance dividers are fed to the cross-coupled latch of the sense amplifier using n-channel pass gates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.