Control circuit for the switching of inductive loads having a push-pull output stage
US4612452A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 17, 1983 |
| Grant date | Sep 16, 1986 |
| Priority date | — |
| Expiry date | Mar 17, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/04126
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A control circuit for the switching of inductive loads which is monolithically integratable and includes an output stage having push-pull transistors. The base of each transistor of the output stage is connected to a driver circuit and to an auxiliary transistor which is biased in saturation. Each auxiliary transistor is driven to conduction in phase opposition with respect to the final transistor to which it is connected. The auxiliary transistor accelerates the turn-off of the final transistor, withdrawing the base charge, while delaying the turn-on thereof and absorbing the current fed thereto for a period of time equal to that of its own turn-off transient; in this way, the simultaneous conduction of the transistors of the final stage during the switching thereof can be avoided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.