Control circuit for hall-effect switching device
US6066966A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 29, 1998 |
| Grant date | May 23, 2000 |
| Priority date | — |
| Expiry date | Jul 29, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/94
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A control circuit for Hall-effect switching device is provided. The control circuit can be used in a Hall-effect switching device to control the output of the Hall-effect switching device in response to Hall effect. The control circuit comprises a current source and two pairs of symmetrically arranged bipolar junction transistors (BJT). The particular arrangement of the BJTs allow the Hall-effect sensitivity by the Hall-effect switching device to be enhanced. The Hall-effect sensitivity can be adjusted by varying the current source in the control circuit. Moreover, the control circuit is designed with a double-output feature that allows the Hall-effect switching device to be realizable with a fewer number of transistors, allowing the Hall-effect switching device to operate with a lower working current and a lower starting voltage as compared to the prior art, thus considerably reducing power consumption.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.