A 5.2 GHz linearized SiGe quadrature modulator using current feedback from output buffer

Fumiki Onoma, Koji Tsutsumi, Shintaro Shinjo, Noriharu Suematsu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

A linearized SiGe up-mixer using current feedback from output buffer is described. The up-mixer consists of a conventional Gilbert cell mixer, an output buffer and a current feedback circuit. According to the output envelope current of the output buffer, the bias current of the mixer is controlled by this feedback circuit. As a result, the proposed up-mixer can realize linearized performance. The simulated P1dB improvements of the proposed up-mixer and the quadrature modulator (QMOD) including this up-mixer are 3.3dB and 1.6dB compared with the conventional types, respectively. The fabricated 5.2 GHz SiGe QMOD achieves the P1dB of -13.9dBm.

Original languageEnglish
Title of host publication2007 Korea-Japan Microwave Conference, KJMW2007, Technical Digest 2007
Pages49-52
Number of pages4
DOIs
Publication statusPublished - 2007 Dec 1
Externally publishedYes
Event2007 Korea-Japan MicroWave Conference, KJMW 2007 - Naha, Okinawa, Japan
Duration: 2007 Nov 152007 Nov 16

Publication series

Name2007 Korea-Japan Microwave Conference, KJMW2007, Technical Digest 2007

Other

Other2007 Korea-Japan MicroWave Conference, KJMW 2007
CountryJapan
CityNaha, Okinawa
Period07/11/1507/11/16

Keywords

  • Microwave bipolar transistor
  • Monolithic microwave integrated circuit (MMIC) up-mixer
  • Silicon

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Communication

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