Envelope Tracking Power Supply Delivers Industry’s Highest 4G/LTE Performance

July 14, 2013 by Jeff Shepard

Quantance Inc. today announced that the company's flagship product, the Q845 qBoostTM ET Power Supply, has been successfully tested with a wide range of power amplifiers (PAs) on customer reference design boards as well as in the labs of PA manufacturers, exhibiting exceptional efficiency, linearity and noise performance with old and new PA technologies from all major PA providers. These results confirm that the Q845 ET Power Supply can be paired with the PAs preferred by all 4G/LTE chipset providers and smartphone manufacturers (OEMs).

Chipset providers and device OEMs are depending on ET to address the increasing demands placed on 4G/LTE systems to improve transmit system efficiency, reduce current consumption, and eliminate thermal problems. At the same time, they are being pressured by band proliferation and platform cost/size reduction to move from single band PAs to multi-mode, multi-band (MMMB) PAs.

To ensure these demands are met today and into the future, qBoost operates with: Off-the-shelf Average Power Tracking (APT) PAs that are in production today; Next gen PAs being optimized for ET, sampling now, and in production starting Q3 2013; MMMB and single band PAs in the most common bands (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 13, 17, 20, 38, 40, 41); and the latest generation of 4G/LTE CMOS PAs. Additionally, qBoost exhibits leading performance at all LTE system bandwidths, from less than 1MHz to 20MHz, and all PA compatibility referenced above can be achieved while still meeting 3GPP receive band noise requirements.

"Our high-speed, boosting ET architecture is the only proven single-chip, production-ready solution that delivers industry leading ET efficiency and receive band noise performance for 4G/LTE up to 20MHz." said Vikas Vinayak, Quantance's CEO and co-founder. "Many in the industry believe this level of performance requires unique PA characteristics, but that is incorrect. Our solution works with legacy PAs and next-generation ET-optimized PAs. We also look forward to proving our technology with emerging CMOS 4G/LTE PAs."