Semiconductor device and ultrasonic diagnostic apparatus using the same
US9190992B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 27, 2011 |
| Grant date | Nov 17, 2015 |
| Priority date | — |
| Expiry date | Sep 4, 2034 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B8/4483
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The present invention provides a semiconductor device of a bi-directional analog switch having a high linearity and a low electric power loss. An ultrasonic diagnostic apparatus having a high degree of detection accuracy, comprising the semiconductor device, is also provided. A semiconductor device of a bi-directional analog switch, comprising a switch circuit capable of switching ON or OFF bi-directionally, and built-in driving circuits for the switch circuit, wherein the driving circuit is connected to first and second power supplies, and a first power supply voltage is higher than a maximum voltage of a signal applied to an input/output terminal of the switch circuit, a second power supply voltage is lower than a minimum voltage of a signal applied to an input/output terminal of the switch circuit, and the driving circuit comprises a Zener diode and a p-type MOSFET connected in series between the first power supply and the switch circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.