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  • Jeongjin Roh, Sanho Byun, Youngkil Choi, Hyungdong Roh, Yi-Gyeong Kim, Jong-Kee Kwon
  • Computer Science
  • IEEE Journal of Solid-State Circuits
  • 2008 (First Published: 1 February 2008)
  • A 0.9-V 60-muW delta-sigma modulator is designed using standard CMOS 0.13-mum technology. The modulator achieves 83-dB dynamic range in a signal bandwidth of 20 kHz with a sampling frequency of 2Continue Reading
  • Kyoungsik Kang, Jeongjin Roh, Youngkil Choi, Hyungdong Roh, Hyunsuk Nam, Songjun Lee
  • Engineering, Mathematics, Computer Science
  • IEEE Transactions on Circuits and Systems II…
  • 2008 (First Published: 1 August 2008)
  • We present the design of a single-chip delta-sigma (DeltaSigma) modulation-based class-D amplifier for driving headphones in portable audio applications. The presented class-D amplifier generatesContinue Reading
  • Hyungdong Roh, Hyoungjoong Kim, Youngkil Choi, Jeongjin Roh, Yi-Gyeong Kim, Jong-Kee Kwon
  • Mathematics, Computer Science
  • IEEE Transactions on Circuits and Systems II…
  • 2009 (First Published: 1 November 2009)
  • A 0.6-V 34-muW delta-sigma modulator implemented by using a standard 0.13-mum complementary metal-oxide-semiconductor technology is presented. This brief analyzes a subthreshold-leakage currentContinue Reading
  • Youngkil Choi, Jeongjin Roh, Hyungdong Roh, Hyunseok Nam, Songjun Lee
  • Mathematics, Computer Science
  • IEEE Transactions on Instrumentation and…
  • 2009 (First Published: 1 July 2009)
  • A fourth-order single-bit delta-sigma modulator is presented for sensor applications. The loop filter is composed of both feedback and feedforward paths, and the modulator is implemented using fullyContinue Reading