Resistor with temperature coefficient of resistance (TCR) compensation
First Claim
1. A resistor having temperature coefficient of resistance (TCR) compensation, the resistor comprising:
- a resistive strip disposed between a first conductive strip and a second conductive strip, the resistive strip having a first end and an opposite second end;
a first main terminal and a first voltage sense terminal formed in the first conductive strip separated by a first slot formed with a first opening at a first outer edge of the conductive strip and having a depth extending toward the resistive strip, the first main terminal being larger than the first voltage sense terminal;
a second main terminal and a second voltage sense terminal formed in the second conductive strip separated by a second slot formed with a second opening at a second outer edge of the conductive strip and having a depth extending toward the resistive strip, the second main terminal being larger than the second voltage sense terminal;
wherein the first outer edge and the second outer edge are on opposite sides of the resistor; and
a third slot formed with an opening at an edge of the first end of the resistive strip between the first and second voltage sense terminals.
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Accused Products
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.
32 Citations
20 Claims
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1. A resistor having temperature coefficient of resistance (TCR) compensation, the resistor comprising:
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a resistive strip disposed between a first conductive strip and a second conductive strip, the resistive strip having a first end and an opposite second end; a first main terminal and a first voltage sense terminal formed in the first conductive strip separated by a first slot formed with a first opening at a first outer edge of the conductive strip and having a depth extending toward the resistive strip, the first main terminal being larger than the first voltage sense terminal; a second main terminal and a second voltage sense terminal formed in the second conductive strip separated by a second slot formed with a second opening at a second outer edge of the conductive strip and having a depth extending toward the resistive strip, the second main terminal being larger than the second voltage sense terminal; wherein the first outer edge and the second outer edge are on opposite sides of the resistor; and a third slot formed with an opening at an edge of the first end of the resistive strip between the first and second voltage sense terminals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of manufacturing a resistor with temperature coefficient of resistance (TCR) compensation, the method comprising:
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attaching a resistive strip having a first end and an opposite second end to a connection side of a first conductive strip and a connection side of a second conductive strip, the resistive strip positioned between the first conductive strip and the second conductive strip; forming a slot with a first opening at a first outer edge of the first conductive strip having a depth extending toward the resistive strip, the slot dividing the first conductive strip into a first main terminal and a first voltage sense terminal, the first main terminal being larger than the first voltage sense terminal; forming a slot with a second opening at a second outer edge of the second conductive strip having a depth extending toward the resistive strip, the slot dividing the second conductive strip into a second main terminal and a second voltage sense terminal, the second main terminal being larger than the second voltage sense terminal; wherein the first outer edge and the second outer edge are on opposite sides of the resistor; and forming a third slot with an opening at an edge of the first end of the resistive strip between the first voltage sense terminal and the second voltage sense terminal. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification