Take a look at the teardown from TechInsight. The first Envelope Tracking ET solution from Qualcomm is being used in this phablet from Samsung. Read more about the envelope tracking QFE1100 from Qualcomm’s blog.
A couple of key things to note.
- The PAs being used in the Note 3 are not CMOS based solution from Qualcomm.
- The improvement in PAE for the PA is still not known and more importantly, the extension of battery life as a result of the ET technology is not something that was published.