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US 12,587,143 B2Granted
Power amplifier stability enhancement at extreme conditions
AssigneeSkyworks Solutions, Inc.
InventorPhilip John Lehtola
Life of this patent
Estimating the term…
Abstract
A power amplifier comprises a first transistor, a first transformer, a first variable resistor, a first bias circuit and coupling circuitry configured to couple the first transformer, a first end of the first variable resistor, and a collector of the first transistor at a first node, the first transformer and a second end of the first variable resistor at a second node, and the bias circuit and a base of the first transistor at a third node.
Claims19
A power amplifier comprising:
- a first transistor;
- a first transformer including a primary inductor and a secondary inductor;
- a first variable resistor;
- a second variable resistor;
- a first bias circuit;
- and
- coupling circuitry configured to couple the first transformer, a first end of the first variable resistor, and a collector of the first transistor at a first node, the first transformer and a second end of the first variable resistor at a second node, and the first bias circuit and a base of the first transistor at a third node.
4 more elements
A circuit comprising:
- a first transistor;
- a first transformer including a primary inductor and a secondary inductor;
- a first variable resistor;
- a first bias circuit;
- a second bias circuit;
- and
- coupling circuitry configured to couple a first end of the primary inductor, a first end of the first variable resistor, and a collector of the first transistor at a first node, a second end of the primary inductor and a second end of the first variable resistor at a second node, and the first bias circuit and a base of the first transistor at a third node.
4 more elements
A circuit comprising:
- a first transistor;
- a first transformer;
- a first variable resistor;
- a second variable resistor;
- a first bias circuit;
- and
- coupling circuitry configured to couple the first transformer, a first end of the first variable resistor, and a collector of the first transistor at a first node, the first transformer and a second end of the first variable resistor at a second node, and the first bias circuit and a base of the first transistor at a third node.
4 more elements
Dependencies are inferred from the claim text.