US 8,525,637 B2 · Resistor with temperature coefficient of resistance (TCR) compensation

Abstract

A current sense resistor and a method of manufacturing a current sensing resistor with temperature coefficient of resistance (TCR) compensation are disclosed. The resistor has a resistive strip disposed between two conductive strips. A pair of main terminals and a pair of voltage sense terminals are formed in the conductive strips. A pair of rough TCR calibration slots is located between the main terminals and the voltage sense terminals, each of the rough TCR calibration slots have a depth selected to obtain a negative starting TCR value observed at the voltage sense terminals. A fine TCR calibration slot is formed between the pair of voltage sense terminals.

Claims14

Dependent claims

A resistor with temperature coefficient of resistance (TCR) compensation, the resistor comprising:

a resistive strip disposed between two conductive strips;
first and second main terminals and first and second voltage sense terminals formed in the conductive strips;
a first pair of slots positioned between at least a portion of the first and second main terminals and at least a portion of the first and second voltage sense terminals;
and
a TCR calibration slot formed between the two conductive strips, wherein the TCR calibration slot has a depth selected to obtain a TCR value observed at the voltage sense terminals that approaches zero.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

13/493,402Filed 11 Jun 2012 · continuation

Priority

4 Sep 2009

Published

US 2012/0293299 A122 Nov 2012

Granted

3 Sep 2013

Term ends

Not estimatedThe source records don’t support an estimate.

Classification13 codes

H01C 7/06
Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered…:…
G01R 1/203
Modifications of basic electric elements for use in electric measuring instruments; Structural combinations of such elements with such…
G01R 19/0092
Arrangements for measuring currents or voltages or for indicating presence or sign thereof: measuring current only
G01R 19/32
Arrangements for measuring currents or voltages or for indicating presence or sign thereof: compensating for temperature change

Family

Application61/239,962Us provisional application · filed 4 Sep 2009

Application61/359,000Us provisional application · filed 28 Jun 2010

Application12/874,514Parent of this continuation · filed 2 Sep 2010

US 8,198,977 B2Parent of this continuation · filed 11 Jun 2012

US 2012/0293299 A1Pre-grant publication · published 22 Nov 2012

US 2011/0057764 A1Published application

US 8,525,637 B2This patent

From the US filing history. Foreign family members aren’t listed.

Resistor with temperature coefficient of resistance (TCR) compensation

Life of this patent

Resistor with temperature coefficient of resistance (TCR) compensation

Life of this patent

Abstract

Claims14