Low voltage isolation switch, in particular for a transmission channel for ultrasound applications
US8665001B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 2012 |
| Grant date | Mar 4, 2014 |
| Priority date | — |
| Expiry date | Jun 28, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/74
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A low voltage isolation switch is coupled between an input terminal suitable for receiving a high voltage signal and an output terminal suitable for transmitting this high voltage signal to a load. The isolation switch includes a first driving transistor coupled between a first reference terminal and an intermediate node, a second driving transistor coupled between the intermediate node and the second reference terminal, a control transistor connected across a diode block coupled between the input and output terminals. The control transistor has a control terminal connected to the intermediate node through a low voltage decoupling block that includes first and second substrate terminals, first and second parasitic capacitive element connected to these first and second substrate terminals, and first and second decoupling transistors coupled in parallel to each other and having control terminals connected to the first and second parasitic capacitive elements, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.