Apparatus and methods for capacitive load reduction
AssigneeSkyworks Solutions, Inc.
InventorsRuss Alan Reisner, Daniel Lee Kaczman, Yu-Jui Lin, Andy Cheng Pang Wu
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Abstract
Apparatus and methods for capacitive load reduction are disclosed. In one embodiment, a power amplifier system includes a power amplifier configured to amplify a radio frequency (RF) signal of a first frequency and an envelope tracker configured to control a supply voltage of the power amplifier using an envelope of the RF signal. The power amplifier system further includes an inductor electrically connected between the power amplifier and the envelope tracker and a capacitor electrically connected between the power amplifier and the envelope tracker. The capacitor and the inductor are configured to have a resonance near the first frequency.
Claims29
A power amplifier system comprising:
- a first power amplifier configured to amplify a first radio frequency (RF) signal of a first frequency;
- an envelope tracker configured to control a supply voltage of the first power amplifier using an envelope of the first RF signal;
- a first inductor electrically connected between the first power amplifier and the envelope tracker;
- and
- a first capacitor electrically connected between the first power amplifier and the envelope tracker, the first capacitor and the first inductor having a resonance near the first frequency.
A method for reducing capacitance in a power amplifier system, the method comprising:
- providing a first power amplifier for amplifying a first radio frequency (RF) signal of a first frequency;
- providing an envelope tracker for controlling a supply voltage of the first power amplifier using an envelope of the first RF signal;
- electrically connecting a first inductor between the first power amplifier and the envelope tracker;
- and
- electrically connecting a first capacitor between the first power amplifier and the envelope tracker, the first capacitor and the first inductor having a resonance near the first frequency.
A mobile device comprising:
- a phone board;
- a first power amplifier module disposed on the phone board for amplifying a first radio frequency (RF) signal of a first frequency, the first power amplifier module including a carrier substrate and a first power amplifier die mounted on the carrier substrate;
- an envelope tracking module disposed on the phone board adjacent the first power amplifier module, the envelope tracking module configured to control a supply voltage of the first power amplifier die using an envelope of the first RF signal;
- a first inductor electrically connected between the first power amplifier die and the envelope tracking module;
- and
- a first capacitor electrically connected between the first power amplifier die and the envelope tracker, the first capacitor and the first inductor having a resonance near the first frequency.
Dependencies are inferred from the claim text.