Journals Proceedings

International Journal of Environmental Engineering

A CMOS Envelope Tracking Power Amplifier with Hybrid Bias Modulator

Author(s) : HEARYUN JUNG, JUNGHYUN HAM, YOUNGOO YANG

Abstract

This paper presents an envelope tracking power amplifier (ET PA) using a hybrid bias modulator for mobile terminal applications. The hybrid bias modulator consists of a linear amplifier and a switching amplifier. The CMOS PA has a two-stage single-ended structure. For 1.75-GHz long-term evolution signal with 5-MHz bandwidth, 7.3-dB peak-to-average power ratio (PAPR), and 16-quadrature amplitude modulation, the CMOS ET PA delivers a power-added efficiency (PAE) of 30.5 %at an average output power of 21dBm. The ET PA also delivers a PAE of 24.2 % at average output power of 17 dBmwhich is 6.9 % higher than that of the stand-alone PA.

No fo Author(s) : 3
Page(s) : 22 - 26
Electronic ISSN : 2374 - 1724
Volume 1 : Issue 3
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