ESD protection circuit for differential I/O pair
US7974053B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 29, 2008 |
| Grant date | Jul 5, 2011 |
| Priority date | — |
| Expiry date | Mar 11, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/45183
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An ESD protection circuit for a differential I/O pair is provided. The circuit includes an ESD detection circuit, a discharge device, and four diodes. The first diode is coupled between the first I/O pin and the discharge device in a forward direction toward the discharge device. The second diode is coupled between the second I/O pin and the discharge device in a forward direction toward the second I/O pin. The third diode is coupled between the discharge device and the positive power line in a forward direction toward the positive power line. The fourth diode is coupled between the discharge device and the negative power line in a forward direction toward the discharge device. Via an output end, the ESD detection circuit triggers the discharge device during ESD events.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.