Power supply implications of envelope tracking
14.00
One obvious way to improve the situation is to emit only the needed RF power. This is relatively easy to do, as the amplifiers operate as AB amplifiers, and the drive signals can be backed off when lower output power is desired. This can be taken a step further by reducing the supply voltage to the amplifiers when lower output power is desired.
Read the full article on page 40 of our December digital edition.
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