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US 9,397,614 B2Granted
Multi-band power amplifier
AssigneeQUALCOMM Incorporated
InventorsSaihua Lin, Anup Savla
Life of this patent
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Abstract
An apparatus includes a first capacitor, an inductor coupled to the first capacitor, and a second capacitor coupled to the inductor. The second capacitor is coupled to a first output of a differential amplifier.
Claims18
An apparatus comprising:
- a differential amplifier having a first output and a second output;
- a first capacitor having a first terminal coupled to the first output of the differential amplifier;
- an inductor having a first terminal coupled to a second terminal the first capacitor;
- and
- a second capacitor having a first terminal coupled to a second terminal of the inductor and a second terminal coupled to the second output of the differential amplifier, wherein the second terminal of the first capacitor is coupled to a first transistor and the first terminal of the second capacitor is coupled to a second transistor.
2 more elements
An apparatus comprising:
- a differential amplifier having a first output and a second output;
- a first capacitor having a first terminal coupled to the first output of the differential amplifier;
- an inductor having a first terminal coupled to a second terminal the first capacitor;
- a second capacitor having a first terminal coupled to a second terminal of the inductor and a second terminal coupled to the second output of the differential amplifier;
- a third capacitor coupled to the first terminal of the inductor;
- and
- a fourth capacitor coupled to the second terminal of the inductor and coupled, via the second capacitor, to the second output of the differential amplifier.
4 more elements
An apparatus comprising:
- means for amplifying a differential signal;
- and
- an impedance loop having a first end coupled to a first output of the means for amplifying and having a second end coupled to a second output of the means for amplifying, the impedance loop comprising:
- first means for storing charge having a first terminal coupled to the first output of the means for amplifying;
- means for generating an inductance having a first terminal coupled to a second terminal of the first means for storing charge;
- and
- second means for storing charge having a first terminal coupled to a second terminal of the means for generating the inductance and a second terminal coupled to the second output of the means for amplifying, wherein the second terminal of the means for storing charge is coupled to first means for selectively conducting current and the first terminal of the second means for storing charge is coupled to second means for selectively conducting current.
4 more elements
A method comprising:
- amplifying a differential input signal at a differential amplifier of a power amplifier;
- providing the amplified differential signal at a first output of the differential amplifier to a loop including a capacitor, an inductor coupled to the capacitor, and a second capacitor coupled to the inductor and to a second output of the differential amplifier;
- receiving an enable signal;
- and
- based on the enable signal, providing a ground voltage to the capacitor the inductor and the second capacitor.
2 more elements
Dependencies are inferred from the claim text.