Semiconductor device for output of pulse waveforms
US8085081B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 16, 2010 |
| Grant date | Dec 27, 2011 |
| Priority date | — |
| Expiry date | Mar 16, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10D30/0212
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A semiconductor device has multiple high-side field-effect transistors and multiple low-side field-effect transistors connected to a single output terminal to generate an output signal. A driver circuit outputs driving signals that turn the field-effect transistors on and off. The driving signal for the field-effect transistors on each side is conducted by a salicided gate line with salicide block areas that produce successive delays, causing the field-effect transistors to turn on sequentially. Alternatively, the transistors have different threshold voltages, or the driving signals for different transistors are output from drivers with different driving abilities, again causing the transistors to turn on sequentially. The output signal therefore rises and falls gradually, reducing electromagnetic interference.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.