Abstract
This paper discusses some design issues of highly efficient and monolithic wideband RF polar transmitters, especially the ones that use the Envelope-Tracking (ET) technique. We will: (1) review the state-of-the-art polar transmitters in the literature; (2) discuss the system-on-a-chip (SoC) design considerations of the monolithic polar transmitter using ET; and (3) discuss the design of envelope amplifiers capable of achieving the high efficiency, current, bandwidth, accuracy and noise specifications required for wideband signals.
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