Reducing Spurious Output of Balanced Modulators by Dynamic Matching of I, Q Quadrature Paths(AD/DA, <Special Section>Analog Circuit and Device Technologies)

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概要

• 論文の詳細を見る

• This paper presents a technique for reducing spurious output of balanced modulators used in transmitters and arbitrary waveform generators. Two-step upconversion is a convenient way to produce a desired single-sideband (SSB) radio-frequency (RF) signal-baseband quadrature I and Q signals (which are analog outputs of direct digital frequency synthesizers) are upconverted by mixers and local oscillators (LOs)-but mismatches between the DACs in I and Q paths cause spurious output. We propose a method of dynamically matching the I and Q paths by multiplexing two DACs between I and Q paths in a pseudo-random manner. MATLAB simulation shows that multiplexing the two DACs spreads the spurious output, caused by mismatches between the two DACs, in the frequency domain, and reduces the peak level of spurious signals.

• 社団法人電子情報通信学会の論文
• 2005-06-01

著者

• SAN Hao

  Department of Information Network Engineering, Tokyo City University

• San Hao

  Dep. Of Information Network Engineering Tokyo City Univ.

• San Hao

  Department Of Electronic Engineering Faculty Of Engineering Gunma University

• Kobayashi Haruo

  Department Of Electronic Engineering Faculty Of Engineering Gunma University

• Kobayashi Haruo

  Electronic Engineering Department Graduate School Of Engineering Gunma University

• Yamada Yoshihisa

  Department Of Cardiology Gifu University Graduate School Of Medicine

• San Hao

  Tokyo City Univ. Tokyo Jpn

• KOMURO Takanori

  Agilent Technologies International Japan, Ltd.

• Komuro T

  Agilent Technologies International Japan Ltd.

• Komuro Takanori

  Department Of Electronic Engineering Faculty Of Engineering Gunma University

• OTSUKI Jun

  Department of Electronic Engineering, Faculty of Engineering, Gunma University

• LIU Aiyan

  Department of Electronic Engineering, Faculty of Engineering, Gunma University

• Kobayashi Haruo

  Gunma University

• Kobayashi Haruo

  Department Of Electronic Engineering Graduate School Of Engineering Gunma University

• Yamada Yoshihisa

  Gunma Univ. Kiryu‐shi Jpn

• Liu Aiyan

  Department Of Electronic Engineering Faculty Of Engineering Gunma University

• Otsuki Jun

  Department Of Electronic Engineering Faculty Of Engineering Gunma University

• KOBAYASHI HARUO

  Department of Animal Breeding, Faculty of Agriculture, University of Tokyo

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