Circuit for the controlled recycle without oscillation of a discharge current from an inductive load
US5917254A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 1997 |
| Grant date | Jun 29, 1999 |
| Priority date | — |
| Expiry date | Apr 28, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/0822
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A circuit for the controlled recycle without oscillation of a discharge current from an inductive load. The circuit comprises an active element connected, in series with the inductive load, between first and second power supply terminals, and having a control terminal to which a driver circuit is connected. The circuit further includes a recycling regulating circuitry connected to a connection node between the active element and the inductive load, and sensitive to a voltage threshold at the connection node to generate, depending on attainment of that threshold, a power-on signal for application to the control terminal effective to start up recycling of the discharge current through the active element. The circuit further comprises a control circuit for controlling the voltage oscillation at the connection node at the end of the recycling. The control circuit includes a circuit having a relatively low resistive impedance and being selectively connectable, at least upon the active element being turned off at the end of the recycling, between the connection node and a node having a substantially zero impedance toward at least one of the first and second power supply terminals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.