JFET switch circuit and structure
US4085417A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 27, 1976 |
| Grant date | Apr 18, 1978 |
| Priority date | — |
| Expiry date | Dec 27, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10D84/406
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
JFET and bipolar transistor devices are combined into an analog signal switching circuit. A JFET acts as a switch device for controlling analog signals. The JFET gate is charged through a bipolar transistor to turn it off and discharged through a second bipolar transistor to turn it on. A second JFET is used to control the conduction of the second bipolar transistor so that it only conducts heavily when a high slew rate is needed. The circuit can switch analog signals very rapidly and yet has very low quiescent current drain in both off and on states. The circuit is very simple and is amenable to monolithic integrated circuit construction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.