Low voltage isolation switch, in particular for a transmission channel for ultrasound applications
US9323268B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2012 |
| Grant date | Apr 26, 2016 |
| Priority date | — |
| Expiry date | Nov 1, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/09443
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A switching circuit is electrically coupled between a connection terminal and an output terminal of a transmission channel and includes first and second switching transistors electrically coupled in series to each other and having respective body diodes in anti-series, between the connection terminal and the output terminal. The switching circuit comprises a bootstrap circuit connected to respective first and second control terminals of these first and one second switching transistors, as well as to respective first and second voltage references. The bootstrap circuit includes a first parasitic capacitance electrically coupled between the first control terminal and a first bootstrap node, and a second parasitic capacitance electrically coupled between the second control terminal and a second bootstrap node. The parasitic capacitances have value of at least one order of magnitude lower with respect to the gate-source capacitances of the first and second switching transistors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.