Complex switch control system
US8125354B2 · kind B2 · utility
0Cited by
15References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 17, 2007 |
| Grant date | Feb 28, 2012 |
| Priority date | — |
| Expiry date | Dec 28, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/1732
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A complex switch control system including many switches, a switching voltage control circuit and a comparator is provided. The switching voltage control circuit converts an operating voltage into a switching voltage according to the states of the switches. The comparator compares the switching voltage with a reference voltage and outputs a switch state signal to a keyboard controller. A duty cycle of the switch state signal corresponds to the states of the switches.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.