Optimization methods for amplifier with variable supply power
US-9219445-B2 · Dec 22, 2015 · US
Apparatus and methods for capacitive load reduction
US9257940B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9257940-B2 |
| Application number | US-201314067828-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 30, 2013 |
| Priority date | Dec 14, 2010 |
| Publication date | Feb 9, 2016 |
| Grant date | Feb 9, 2016 |
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Abstract
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Apparatus and methods for capacitive load reduction are disclosed. In one embodiment, a power amplifier system includes a plurality of power amplifiers and an envelope tracking module for generating a supply voltage for the power amplifiers. The power amplifier system further includes a switch and a decoupling capacitor operatively associated with a first power amplifier of the system. The switch is configured to electrically float an end of the decoupling capacitor when the first power amplifier is disabled so as to reduce capacitive loading of the envelope tracker and to operate as a dampening resistor when the power amplifier is enabled so as to improve the stability of the system.
First claim
Opening claim text (preview).
The invention claimed is: 1. A power amplifier system comprising: a first power amplifier configured to receive a power amplifier supply voltage, the first power amplifier having an enabled state and a disabled state; a supply control circuit configured to control a voltage level of the power amplifier supply voltage; a first switchable capacitor; a first field effect transistor (FET) electrically connected in series with the first switchable capacitor between the power ampl…
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Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
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Frequently asked questions
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- What does patent US9257940B2 cover?
- Apparatus and methods for capacitive load reduction are disclosed. In one embodiment, a power amplifier system includes a plurality of power amplifiers and an envelope tracking module for generating a supply voltage for the power amplifiers. The power amplifier system further includes a switch and a decoupling capacitor operatively associated with a first power amplifier of the system. The swit…
- Who is the assignee on this patent?
- Skyworks Solutions Inc
- What technology area does this patent fall under?
- Primary CPC classification H03F1/0222. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Feb 09 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).