Voltage sampling switch and method therefor
US9484905B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 22, 2016 |
| Grant date | Nov 1, 2016 |
| Priority date | — |
| Expiry date | Jan 22, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C27/024
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A voltage switch for handling negative voltages includes an input terminal coupled to a voltage that is greater than a voltage rating of oxide in the voltage switch, a top capacitor plate pre-charge module including three cascoded p-channel transistors coupled between a supply voltage and a top plate of a capacitor, a bottom capacitor plate pre-charge module including two cascoded n-channel transistors coupled between a bottom plate of the capacitor and ground, and an output voltage module including an output terminal and four cascoded n-channel transistors with control electrodes of a first and fourth of the cascoded n-channel transistors coupled to a boost node. Control electrodes of a second and third of the cascoded n-channel transistors coupled to the top plate of the capacitor. A voltage switch for positive voltages is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.