Structure for use in self-biasing and source bypassing a packaged, field-effect transistor and method for making same
First Claim
Patent Images
1. A self-biased and source bypassed, packaged, field-effect transistor structure, comprising:
- a packaged, field-effect transistor including a housing having a defined width, a field-effect transistor located within said housing, and first and second source leads extending from said field-effect transistor, through said housing, and outward from said housing;
means for grounding, wherein at least a portion of said housing is located intermediate said packaged, field-effect transistor and said means for grounding;
a source resistor for use in biasing the field-effect transistor, said source resistor having a first terminal electrically contacting said means for grounding and a second terminal electrically contacting at least one of the source leads;
a first capacitor for use in grounding the first source lead of the field-effect transistor during AC operation, said first capacitor having a first lower plate electrically contacting said means for grounding and a first upper plate separated from said first lower plate by a first dielectric, wherein said first upper plate of said first capacitor is positioned adjacent to the first source lead of the packaged, field-effect transistor for direct electrical connection therewith;
a second capacitor for use in grounding the second source lead of the field-effect transistor during AC operation, said second capacitor have a second lower plate electrically contacting said means for grounding and a second upper plate separated from said second lower plate by a second dielectric, wherein said second upper plate of said second capacitor is positioned adjacent to the second source lead of the packaged, field-effect transistor for direct electrical connection therewith.
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention provides a structure for use in self-biasing and source bypassing a packaged, field-effect transistor (FET) having first and second leads. The structure is readily assembled and provides an excellent noise figure.
-
Citations
25 Claims
-
1. A self-biased and source bypassed, packaged, field-effect transistor structure, comprising:
-
a packaged, field-effect transistor including a housing having a defined width, a field-effect transistor located within said housing, and first and second source leads extending from said field-effect transistor, through said housing, and outward from said housing; means for grounding, wherein at least a portion of said housing is located intermediate said packaged, field-effect transistor and said means for grounding; a source resistor for use in biasing the field-effect transistor, said source resistor having a first terminal electrically contacting said means for grounding and a second terminal electrically contacting at least one of the source leads; a first capacitor for use in grounding the first source lead of the field-effect transistor during AC operation, said first capacitor having a first lower plate electrically contacting said means for grounding and a first upper plate separated from said first lower plate by a first dielectric, wherein said first upper plate of said first capacitor is positioned adjacent to the first source lead of the packaged, field-effect transistor for direct electrical connection therewith; a second capacitor for use in grounding the second source lead of the field-effect transistor during AC operation, said second capacitor have a second lower plate electrically contacting said means for grounding and a second upper plate separated from said second lower plate by a second dielectric, wherein said second upper plate of said second capacitor is positioned adjacent to the second source lead of the packaged, field-effect transistor for direct electrical connection therewith. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
-
-
20. A self-biased and source bypassed, packaged, field-effect transistor structure, comprising:
-
a packaged, field-effect transistor including a housing, a field-effect transistor located within said housing, and first and second source leads extending from said field-effect transistor, through said housing, and outward from said housing; a grounding structure including a first substantially planar land, a second substantially planar land, a grounding plane spaced from said first and second land by a substrate, a first grounding pin electrically connecting said first land and said grounding plane, a second grounding pin electrically connecting said second land and said grounding plane, and a hole located intermediate said first and second lands, wherein at least a portion of said housing is located intermediate said field-effect transistor and said means for grounding; a first capacitor for use in grounding the first source lead of the field-effect transistor during AC operation, said first capacitor having a first lower plate electrically contacting said first land and a first upper plate separated from said first lower plate by a first dielectric, said first dielectric having a first edge, said first upper plate and said first lower plate separated by a defined distance; a second capacitor for use in grounding the second source lead of the field-effect transistor during AC operation, said second capacitor having a second lower plate electrically contacting said second land and a second upper plate separated from said second lower plate by said second dielectric, said second upper plate and said second lower plate separated by said defined distance; a wrap-around connector including a first portion electrically contacting said first land, a second portion spaced from said first portion by said first dielectric and said defined distance, and a third portion extending along said first edge of said first dielectric and electrically connecting said first portion and said second portion, wherein said first upper plate of said first capacitor, said second upper plate of said second capacitor and said second portion of said wrap-around connector are substantially coplanar; and a chip resistor having a first terminal electrically contacting said second portion of said wrap-around connector and a second terminal electrically contacting said first upper plate of said first capacitor.
-
-
21. A self-biased and source bypassed, packaged, field-effect transistor assembly for operation in the microwave range extending from approximately 1 GHz to 12 GHz, comprising:
-
a packaged, field-effect transistor including a housing, a field-effect transistor located inside said housing, and first and second source leads extending from said field-effect transistor, through said housing, and outward from said housing; means for grounding, wherein at least a portion of said housing is located intermediate said field-effect transistor and said means for grounding; a source resistor for use in biasing the field-effect transistor, said source resistor having a first terminal electrically contacting said means for grounding and a second terminal electrically contacting at least one of the source leads; a first capacitor for use in grounding the first source lead of the field-effect transistor during AC operation, said first capacitor having a first lower plate electrically contacting said means for grounding and a first upper plate separated from said first lower plate by a first dielectric, wherein said first upper plate of said first capacitor is positioned immediately adjacent to the first source lead of the packaged, field-effect transistor for direct electrical connection therewith; a second capacitor for use in grounding the second source lead of the field-effect transistor during AC operation, said second capacitor having a second lower plate electrically contacting said means for grounding and a second upper plate separated from said second lower plate by a second dielectric, wherein said second upper plate of said second capacitor is positioned immediately adjacent to the second source lead of the packaged, field-effect transistor for direct electrical connection therewith. - View Dependent Claims (22, 23, 24, 25)
-
Specification