Slew-Rate and Efficiency Trade-off in Slow Envelope Tracking Power Amplifiers
-
Pedro P. Vizarreta
,
Pere L. Gilabert
Abstract
This paper presents a study on the trade-off between the envelope's slew-rate and the drain efficiency when slower envelopes are considered to dynamically supply the power amplifier (PA). This paper discusses a method to limit the slew-rate (and consequently the bandwidth) of the signal's envelope. Moreover, since the envelope tracking (ET) technique using a slower version of the original envelope introduces nonlinear distortion, slow envelope dependent predistortion has to be also incorporated in the design of ET PAs. Experimental results showed that it is possible to find a compromise between the bandwidth and slew-rate reduction (necessary to cope with the specific envelope amplifier requirements) and the amount of drain efficiency degradation suffered due to the use of a slower version of the original envelope.
©[2012] by Walter de Gruyter Berlin Boston
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Artikel in diesem Heft
- Masthead
- Editorial
- Slew-Rate and Efficiency Trade-off in Slow Envelope Tracking Power Amplifiers
- A Four-Antenna 802.11a Receiver integrated in 0.25 µm SiGe BiCMOS with Spatial Weighting
- Investigation of GaN-HEMT Based Switches for Hybrid Switching Amplifier Supply-Modulators
- Reconfigurable 4 × 4 Switch Matrix for Ka-Band Geo-Stationary Satellite Mission
- On-Orbit Verification of a 4 × 4 Switch Matrix for Space Applications based on the Low Temperature Co-fired Ceramics Technology
- A Novel Sequential Monte Carlo Method Based Synthetic Aperture Reconstruction Approach for Real-Time 3D Wireless Local Positioning
- Extraction of Micro-Doppler Signatures using Automotive Radar Sensors
- Non-Contacting Moisture Sensing using a Dedicated UWB Time Domain Instrument
- Design and Test of an Imaging System for UWB Breast Cancer Detection
