Capacitor controlled switch system
US8818005B2 · kind B2 · utility
0Cited by
26References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 17, 2011 |
| Grant date | Aug 26, 2014 |
| Priority date | — |
| Expiry date | Jan 25, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/00346
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A switch controller is provided that uses one or more capacitors to generate a slow turn on/slow turn off switch control signals to suppress audible switching noise in an audio switch. In some embodiments, an analog inverter and a capacitor are used to generate the switch control signals, while in other embodiments two capacitors are used to generate the switch control signals. To conserve power between switching states, routing logic is provided that ties the switch control signals to respective voltage rails and disables selected portions of the switch controller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.