Control circuit for switching inductive loads
US4549095A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 15, 1982 |
| Grant date | Oct 22, 1985 |
| Priority date | — |
| Expiry date | Nov 15, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/04126
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A control circuit for switching inductive loads which can be monolithically integrated and used in high-speed printing equipment and in chopper power supply systems. The circuit includes a final power transistor, driven for switching by means of a drive transistor coupled to its control terminal. A speedup circuit is connected to the control terminals of both of the transistors in order to accelerate the turning off of the transistors by reducing the discharge time thereof. Such a speedup circuit is enabled so as to remove charge carriers only for a period of time which begins when the transistors are turned off in order to avoid additional time delays when the transistors are subsequently turned on again.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.