Variable resistor and method of manufacturing the same
AssigneePanasonic Corporation
InventorsSeiki Miura, Takumi Nishimoto
Life of this patent
Estimating the term…
Abstract
A variable resistor includes a resistor element having a first end and a second end, a slider sliding on the resistor element, an adjustable resistor portion having a first end connected to the first end of the resistor element and having a second end, a first terminal connected to the second end of the adjustable resistor portion, a second terminal electrically coupled to the second end of the resistor element, and a third terminal connected to the slider. The adjustable resistor portion is positioned outside of the sliding range of the slider. This variable resistor outputs a precise resistance having s small variation from a predetermined resistance.
Claims15
A variable resistor comprising:
- a resistor element having a first end and a second end;
- a slider operable to slide on the resistor element, the slider having a sliding range which the slider slides on, a first end of the sliding range positioned at the first end of the resistor element and the second end of the sliding range positioned at the second end of the resistor element;
- a conductor element having a first end and a second end, the second end of the conductor element connected to the first end of the resistor element;
- a first adjustable resistor portion having a first end and a second end, the first end of the first adjustable resistor portion being connected to the first end of the conductor element, the first adjustable resistor portion being positioned outside of the sliding range of the slider;
- a first terminal connected to the second end of the first adjustable resistor portion;
- a second terminal electrically coupled to the second end of the resistor element;
- and
- a third terminal connected to the slider.
A method of manufacturing a variable resistor comprising:
- providing a resistor element having a first end and a second end;
- providing a slider for sliding on the resistor element, the slider having a sliding range which the slider slides on, a first end of the sliding range positioned at the first end of the resistor element and the second end of the sliding range positioned at the second end of the resistor element;
- providing a conductor element having a first end and a second end, the second end of the conductor element connected to the first end of the resistor element;
- providing a first adjustable resistor portion having a first end and a second end, the first end of the first adjustable resistor portion being connected to the first end of the conductor element, the first adjustable resistor portion being positioned outside of the sliding range of the slider;
- providing a first terminal connected to the second end of the first adjustable resistor portion;
- providing a second terminal electrically coupled to the second end of the resistor element;
- providing a third terminal connected to the slider;
- after said providing the first adjustable resistor portion, detecting a change according to a position of the slider of a resistance between at least two of the first terminal, the second terminal, and the third terminal;
- and
- adjusting a resistance of the first adjustable resistor portion based on the detected change.
Dependencies are inferred from the claim text.