Output buffer with reduced noise
US5367210A · kind A · utility
24Cited by
6References
13Claims
0Family size
Inventor
Key dates
| Filing date | Feb 12, 1992 |
| Grant date | Nov 22, 1994 |
| Priority date | — |
| Expiry date | Feb 12, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/0036
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An output buffer and a method provide controlled low noise operation using a current mirror which provides a rapid increase in the gate voltage of an output transistor prior to the gate voltage reaching the threshold voltage of the output transistor and provide a constant current voltage ramp thereafter. In one embodiment, the present invention automatically compensates for normal variations in transistor channel length due to fluctuations of process parameters. In one embodiment, a mechanism for switching off the current mirror is provided to reduce power consumption.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.