Browse Prior Art Database

Current Sense Correction

IP.com Disclosure Number: IPCOM000048704D
Original Publication Date: 1982-Mar-01
Included in the Prior Art Database: 2005-Feb-09
Document File: 2 page(s) / 24K

Publishing Venue

IBM

Related People

Sweet, MD: AUTHOR

Abstract

The article describes a new approach for current sensing in circuits with high current. Instead of comparing the voltage across a constant sense resistor with a constant reference voltage, a reference voltage is created across a resistor sharing ground with the sense resistor. Then, the actual voltage at ground can vary without destroying the reading,

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Current Sense Correction

The article describes a new approach for current sensing in circuits with high current. Instead of comparing the voltage across a constant sense resistor with a constant reference voltage, a reference voltage is created across a resistor sharing ground with the sense resistor. Then, the actual voltage at ground can vary without destroying the reading,

With reference to the figure, the current to be sensed I flows through sense resistor R1. Thus, the reference voltage is created across resistor R2 which is connected to a common node 10 with sense resistor R1 and thus shares ground with sense resistor R1. Node 10 may float.

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