Inductive load driving amplifier
US4096400A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 15, 1977 |
| Grant date | Jun 20, 1978 |
| Priority date | — |
| Expiry date | Apr 15, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10D84/617
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An inductive load driving amplifier is disclosed which includes two serially connected transistors, with Zener diodes limiting the collector-emitter voltage of the one and diverting the collector-base current of the other when the first one switches off. The driver is implemented as an integrated circuit. This collector isolation constitutes a high voltage Zener diode which contributes to limit the collector voltages. The combination of these features prevents the device from being exposed to second breakdown when switching highly inductive loads (e.g. several Henrys under 50V), thereby avoiding the harmful effects of breakdowns during switching.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.