High voltage switch with reduced voltage stress at output stage
US7750689B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 24, 2008 |
| Grant date | Jul 6, 2010 |
| Priority date | — |
| Expiry date | Dec 24, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K3/356182
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The present invention discloses a high voltage switching module having reduced stress at its driver output stage which in turn controls the gate of a transistor requiring a high current drive. The switching module includes a negative elevating circuit, a delay module, a pull-up circuit, and a pull down circuit. The negative elevating circuit senses a transition of a logic input signal to generate a control signal. The first pull-up circuit is operatively coupled to this control signal for switching the driver output from a negative voltage to a ground voltage. There is an additional delay module which is configured to provide a delay in the logic input signal. This delayed logic input signal is operatively coupled to the second pull-up stage which takes the output of the driver from GND to VDD. The pull-down circuit is operatively coupled to the negative elevator for controlling a voltage at the driver output to the negative level. The module further comprises a switching circuit that is operatively coupled to the driver output for controlling the passing of a high voltage with high current requirements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.