Electrostatic discharge protection circuit coupled on I/O pad
US7106563B2 · kind B2 · utility
12Cited by
2References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 15, 2004 |
| Grant date | Sep 12, 2006 |
| Priority date | — |
| Expiry date | Nov 12, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10D8/80
Abstract
An I/O pad ESD protection circuit is composed of a SCR circuit, a first diode, a second diode, and an anti-latch-up circuit. The SCR circuit has a first connection terminal and a second connection terminal, respectively coupled to the I/O pad and the ground voltage, so as to discharge the electrostatic charges. The anti-latch-up circuit has two terminals, which are respectively coupled to the voltage source and the ground voltage, and another connection terminal, used to send an anti-latch-up signal to the SCR for changing the activating rate. The latch-up phenomenon is avoided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.