David S. Ripley received his B.S. EE degree from Iowa State University in 1992 and his M.S. EE degree from National Technical University in 2002. From 1992 to 1999, he worked at Motorola in the design and development of TDMA and AMPS handsets including RFIC design of receiver and synthesizer functions. Since 1999, he has been with Skyworks Solutions, Inc. Cedar Rapids, IA, where he has been involved with architecture and design of HBT Front End modules for 2G/3G/4G cellular handsets. His most recently work has focused on SOI switch and LNA for next generation modules. He currently holds over 40 patents. Abstract：
Front End Power Management for the Next Generation
As next generation cellular systems drive towards adoption of complex carrier aggregation architectures, increased front end losses drive the requirement for increased transmit power. As a result, power management of the cellular front end is critical to support the elevated power levels while maintaining battery life and reducing heating. A summary of the various front end power management architectures including Average Power Tracking (APT), and Envelope Tracking (ET) is presented discussing the power amplifier and power supply technology challenges. Often the power amplifier and power supply are designed independently resulting in compromised performance. Data from a next generation front end solution is presented demonstrating significant improvement arising from co-design of the power amplifier and power supply architectures. A system level view is taken though-out the discussion with consideration of interface and calibration expectations. |
