Power switching output stage with dead zone minimization and possibility of parallel synchronous connection
US6288605A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 18, 2000 |
| Grant date | Sep 11, 2001 |
| Priority date | — |
| Expiry date | Jan 18, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/2178
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A switching output power stage, including a power switching device for the supply line and a complementary power switching device for the ground rail driven in phase opposition by a pulse width modulated (PWM) drive signal, is provided with sensors detecting a substantial turn-off state of each of the two power switching devices and generating a pair of logic signals. A combinatory logic circuit combines the drive signal and the pair of logic signals and generates a pair of driving signals of opposite phase for the respective power switching devices. The switching to a turn-on state of any of the two power devices is enabled upon verifying a substantially attained turn-off state by the device complementary to the device commanded to turn-on, irrespective of the process spread and of changes of temperature load conditions and of configuration of a plurality of output stages of a multichannel amplifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.