CMOS high voltage drive output buffer
US6014039A · kind A · utility
11Cited by
5References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 28, 1998 |
| Grant date | Jan 11, 2000 |
| Priority date | — |
| Expiry date | Apr 28, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/0018
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A CMOS high voltage drive output buffer that protects the drive stage from seeing relatively high voltages (e.g., 5 V) during "hot pluggable" conditions (that is, when the reference voltage VDD is not present). A transmission gate and clamping transistors are disposed around the output devices to provide the requisite protection. A backgate bias generator for use with P-channel devices is also disclosed that is capable of withstanding "hot pluggable" conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.