Low voltage isolation switch, in particular for a transmission channel for ultrasound applications
US8810302B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 2012 |
| Grant date | Aug 19, 2014 |
| Priority date | — |
| Expiry date | Aug 16, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/74
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A low voltage isolation circuit is coupled between an input terminal for receiving a high voltage signal and an output terminal for transmitting the high voltage signal to a load. The isolation circuit includes a driving block; having a first driving transistor coupled between a first voltage reference and an intermediate node and a second driving transistor coupled between the intermediate node and a second voltage reference; an isolation block connected between the input and output terminals and, through a protection block to the intermediate node. The protection block includes first and second protection transistors (MD1, coupled in anti-series to each other and having control terminals receiving complementary protection driving signals. The isolation block includes a voltage limiter block, a diode block and a control transistor connected across the diode block between the input and output terminals and having a control terminal connected to the intermediate node through the protection block.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.