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[* black] Time for '''Science with iFixit!''' Today, let's learn about [https://www.youtube.com/watch?v=MVtKYlgZ1xI|Envelope Tracking|new_window=true].
[* black] First developed in the 1930s to improve efficiency of high-power AM radio transmitters, Envelope Tracking is the continual monitoring and tuning of the power amplifier to [http://en.wikipedia.org/wiki/Envelope_Tracking#mediaviewer/File:Envelope_Tracking_waveform.jpg|match the power needed for the transmission|new_window=true], reducing wasteful excess energy supplied to the radio.
[* red] Our Russian Mini is sporting R2 Semiconductor R2AA217C Envelope Tracking Modulator, controlling the TriQuint TQP9059S Power Amplifier.
[* icon_note] Of the few phones tothat support Envelope Tracking, this is the first we've seen that isn't powered by a Qualcomm chip.
[* icon_note] Of the few phones tothat support Envelope Tracking, this is the first we've seen that isn't powered by a Qualcomm chip.

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