Design of Low-Power and High-Frequency Switched-Opamp Circuits

  • Vincent S. L. Cheung
  • Howard C. Luong
Part of the The Kluwer International Series in Engineering and Computer Science book series (SECS, volume 737)

Abstract

In 1994, switched-opamp (SO) technique [CRO 94] has been shown to be a promising low-cost solution to realize SC circuits at 1-V in standard CMOS processes. Since then, a few numbers of modifications [BAS 97a, CHE 00b] have been proposed to improve the performance of the switched-opamp technique in terms of operation speed and compatibility with most of the existing SC systems. Yet, SC circuits employing those switched-opamp techniques at 1-V operation can only achieve a reported operation speed up to 10 MHz, which is far lower than the SC circuits at higher voltages. This chapter focuses on the development of switched-opamp circuits, on both system-level and circuit-level, to handle with both low power and high frequency applications. Up to 50 MHz of operation speed was measured through the demonstration of a 1-V 10.7-MHz CMOS switched-opamp bandpass ΣΔ modulator [CHE 02b].

Keywords

Output Swing Stopband Attenuation CMFB Circuit Peak SNDR Opamp Gain 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 2003

Authors and Affiliations

  • Vincent S. L. Cheung
    • 1
  • Howard C. Luong
    • 1
  1. 1.Hong Kong University of Science & TechnologyChina

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