Envelope Tracking PAs from RFMD is certainly a step forward for GaAS PA vendors. From the press announcement, RFMD’s new PAs support both APT (Average Power Tracking) and ET (Envelope Tracking). No specific performance improvement was given in the press release. This was also the case for Qualcomm‘s RF360 chipset. The two ET enabled PAs mentioned in the press release from RFMD were RF7389 and RF8085, however, datasheets for these 2 parts are not available on their web site.
Would be interesting to see which handset OEMs will be shipping RFMD ET solutions. This definitely puts the pressure on Qualcomm and other competitors in the handset PA space.
- RFMD Achieves Record Quarterly Revenue Of $310.7 Million (sacbee.com)
- RFMD(R) Begins High-Volume Production of Envelope Tracking Power Amplifiers to Support Recent LTE Smartphone, Tablet and Ultrabook Design Wins (hispanicbusiness.com)