Title:
電流測定プローブに用いる電流検知回路
Document Type and Number:
Japanese Patent JP5164180
Kind Code:
B2
Abstract:
A current sensing circuit has a transformer where a current to be measured induces a magnetic flux into a magnetic core. The magnetic core has a magneto-electric converter for sensing DC to low frequency current signals and a secondary winding for sensing higher frequency current signals. The magneto-electric converter generates an output that is coupled via an amplifier to a non-inverting input of a transimpedance amplifier. The inverting input of the transimpedance amplifier is coupled to the secondary winding of the transformer. A current signal path having a transimpedance resistor couples the inverting input to the output of the transimpedance amplifier. The transimpedance amplifier functions as a power amplifier for coupling a nulling current to the transformer for DC to low frequency current signals and functions as a transimpedance gain amplifier for higher frequency signals.
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| JPS52135775 | POTENTIAL DETECTING CIRCUIT |
| JPS58117470 | BATTERY MONITOR |
Inventors:
Mende Michael Jay
Crane Albert S. Jr.
Dandy Jonathan S
Crane Albert S. Jr.
Dandy Jonathan S
Application Number:
JP2009510104A
Publication Date:
March 13, 2013
Filing Date:
May 04, 2007
Export Citation:
Assignee:
TEKTRONIX,INC.
International Classes:
G01R19/00; G01R15/18; G01R15/20; G01R19/06
Domestic Patent References:
| JP1265168A | ||||
| JP2001245469A | ||||
| JP11330609A | ||||
| JP2000307958A | ||||
| JP743390A |
Foreign References:
| US3525041 |
Attorney, Agent or Firm:
Yamaguchi International Patent Office