A fully monolithic BiCMOS envelope-tracking power amplifier with on-chip transformer for broadband wireless applications

Yan Li, Jerry Lopez, Ruili Wu, Donald Y.C. Lie

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

This letter presents a power-combined BiCMOS power amplifier (PA) system using envelope-tracking (ET) to serve as a fully monolithic solution for high peak-to-average ratio (PAR) broadband signals. The system consists of two cascode unit PAs combined by an on-chip transformer and modulated by a single envelope modulator. Without needing predistortion, the maximum linear output power of 24.6 dBm/23.8 dBm/23.2 dBm can be achieved with overall power-added-efficiency (PAE) of 26%/24%/22.5% for the LTE 16QAM 5 MHz/LTE 16QAM 10 MHz/WiMAX 64QAM 5 MHz signals at 1.9 GHz. The proposed power-combined ET-PA is fabricated in the TSMC 0.35 μm SiGe BiCMOS technology.

Original languageEnglish
Article number6202374
Pages (from-to)288-290
Number of pages3
JournalIEEE Microwave and Wireless Components Letters
Volume22
Issue number6
DOIs
StatePublished - 2012

Keywords

  • Envelope-tracking (ET)
  • envelope modulator
  • on-chip transformer
  • power-combined power amplifier (PA)

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