Surface mountable high current resistor
AssigneeMotorola, Inc.
InventorMichael H. Bartlett
Life of this patent
Estimating the term…
Abstract
A surface mountable, high current resistor (20) is formed generally in the shape of an inverted "U". The top portion (22) of the inverted "U" is flat and contains one or more openings (26, 27) that serve to alter the resistivity of the resistor. The openings are formed so as to be inverted mirror images of each other, thereby cancelling inductive effects introduced by the openings. The ends of the "U" are formed into two or more legs (24) that serve to provide stability and a mounting area for soldering the resistor to a printed circuit board. A flat, unbroken portion (28) in the center of the resistor serves as a convenient area to handle the resistor with a vacuum tool during printed circuit assembly.
Claims18
A surface mountable electrical resistor, comprising:
- a metal stamping having an electrically resistive characteristic, the metal stamping having a major surface and at least two legs, each leg serving to provide electrical connection and formed into a right angle so as to provide a surface mountable portion to a printed circuit board and;
- the major surface being formed into a pattern by means of one or more openings formed in the major surface.
A surface mountable electrical resistor, comprising an electrically resistive metal sheet formed generally in the shape of an inverted "U", the metal sheet having a primary resistive portion and at least two leg portions, each leg portion having a solderable mounting portion for attachment to a printed circuit board, the primary resistive portion having one or more openings formed in a major surface, the openings being shaped to minimize inductance in the resistor.
A surface mountable electrical resistor, comprising a nichrome strip formed generally in the shape of an inverted "U", the nichrome strip having a primary resistive portion and four legs substantially perpendicular to the resistive portion, each leg having a solderable mounting portion for attachment to a printed circuit board, the primary resistive portion having a solid portion at a center and one or more openings formed in a major surface, the openings being shaped and arranged to produce inductive canceling of the resistor.
Dependencies are inferred from the claim text.