Invention Grant
- Patent Title: Current sensor and method for detecting a currentless state
- Patent Title (中): 用于检测无电流状态的电流传感器和方法
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Application No.: US13657063Application Date: 2012-10-22
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Publication No.: US08841906B2Publication Date: 2014-09-23
- Inventor: Klaus Heberle , Joerg Franke
- Applicant: Micronas GmbH
- Applicant Address: DE Freiburg
- Assignee: Micronas GmbH
- Current Assignee: Micronas GmbH
- Current Assignee Address: DE Freiburg
- Agency: Muncy, Geissler, Olds & Lowe, P.C.
- Priority: DE102011116544 20111021
- Main IPC: G01R33/07
- IPC: G01R33/07 ; G01R33/00 ; G01R33/09
Abstract:
A current sensor having a magnetic field sensor, and a variable current source connected to the magnetic field sensor, and a first differential amplifier, connected to the magnetic field sensor, for amplifying a first sensor voltage. A second differential amplifier is provided and the second differential amplifier is connected to the first differential amplifier and to the current source. In the case of the first sensor voltage, a first operating current is present at the magnetic field sensor and in the case of a second sensor voltage, a second operating current is present, whereby the second Hall voltage is smaller than the first sensor voltage and the second operating current is greater than the first operating current.
Public/Granted literature
- US20130099781A1 CURRENT SENSOR AND METHOD FOR DETECTING A CURRENTLESS STATE Public/Granted day:2013-04-25
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