Electronic switches
US4075511A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 19, 1976 |
| Grant date | Feb 21, 1978 |
| Priority date | — |
| Expiry date | Apr 19, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/667
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
This invention relates to electronic switches for driving a load, for example, a capacitive load. Specifically, the switch of the invention includes means for producing a first pulsed current of a certain value and for a period of time sufficient to charge the capacitive load, means for producing a second holding current sufficient to supply leakage current to the load, the input having one side thereof connected in circuit with a reference voltage to which it is required to switch the load and having the other side thereof connected to the emitter of a transistor, with the base of the transistor driven from a potential divider disposed across the input and with the collector of the transistor connected to the capacitive load, and a diode connected between the collector of the transistor and the reference voltage so that when the transistor conducts, current is drawn from or fed to the load until the output voltage is higher than the reference, whereupon the output is clamped by the current flowing through the diode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.