A CMOS optical receiver with subtraction-based level shifter for high-definition digital audio interfaces

  • Authors:

  • Gil-Su Kim;Chulwoo Kim;Soo-Won Kim

  • Affiliations:

  • Department of Electronics and Computer Engineering, ASIC Design Laboratory, Korea University, Seoul, Republic of Korea 136-701;Department of Electronics and Computer Engineering, AISL Laboratory, Korea University, Seoul, Republic of Korea 136-701;Department of Electronics and Computer Engineering, ASIC Design Laboratory, Korea University, Seoul, Republic of Korea 136-701

  • Venue:
  • Analog Integrated Circuits and Signal Processing
  • Year:
  • 2007

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Abstract

This paper proposes a cost-effective CMOS optical receiver with a level shifter to reduce pulse width distortion and design complexity in high-definition digital audio interfaces. In this design, a level shifter is introduced at the receiver, in order to improve digital audio quality by threshold convergence. Measurement results demonstrate that the implemented optical receiver in a 0.25-μm CMOS technology can successfully reduce pulse width distortion within 驴2% and circuit complexity.