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US 12,191,823 B2Granted
Parallel cascode amplifier for enhanced low-power mode efficiency
AssigneeSkyworks Solutions, Inc.
InventorPhilip John Lehtola
Life of this patent
Estimating the term…
Abstract
In some embodiments, a power amplification system can comprise a current source, an input switch configured to alternatively feed current from the current source to a high-power circuit path and a low-power circuit path, and a band switch including a switch arm for switching between a plurality of bands. Each of the high-power circuit path and the low-power circuit path can be connected to the switch arm.
Claims17
A power amplification system comprising:
- a current source;
- an input switch configured to alternatively feed current from the current source to a high-power circuit path and a low-power circuit path, the high-power circuit path including a first transistor including a first collector, a first emitter, and a first base, a second transistor including a second collector, a second emitter, and a second base, and a fourth transistor including a fourth collector, a fourth emitter, and a fourth base, the first base being coupled to the second base and the first collector being coupled to the second collector, the low-power circuit path including a third transistor including a third collector, a third emitter, and a third base;
- and
- a band switch including a switch arm for switching between a plurality of bands, each of the first collector and the second collector being coupled to the switch arm, and the third collector being coupled to the switch arm via the first transistor.
1 more element
A method comprising:
- alternatively providing current, at an input switch, from a current source to a high-power circuit path or a low-power circuit path, the high-power circuit path including a first transistor including a first collector, a first emitter, and a first base, a second transistor including a second collector, a second emitter, and a second base, and a fourth transistor including a fourth collector, a fourth emitter, and a fourth base, the first base being coupled to the second base and the first collector being coupled to the second collector, the low-power circuit path including a third transistor including a third collector, a third emitter, and a third base;
- and
- switching a switch arm of a band switch between a plurality of bands based on a current provided to the high-power circuit path or the low-power circuit path, each of the first collector and the second collector being coupled to the switch arm, and the third collector being coupled to the switch arm via the first transistor.
A circuit comprising:
- a current source;
- an input switch configured to alternatively feed current from the current source to a high-power circuit path and a low-power circuit path, the high-power circuit path including a first transistor including a first collector, a first emitter, and a first base, a second transistor including a second collector, a second emitter, and a second base, and a fourth transistor including a fourth collector, a fourth emitter, and a fourth base, the first base being coupled to the second base and the first collector being coupled to the second collector, the low-power circuit path including a third transistor including a third collector, a third emitter, and a third base;
- and
- a band switch including a switch arm for switching between a plurality of bands, each of the first collector and the second collector being coupled to the switch arm, and the third collector being coupled to the switch arm via the first transistor.
1 more element
Dependencies are inferred from the claim text.