10-Bit, 100-MS/s sample-and-hold amplifier adopting positive feedback technique

Gil Su Kim, Jae Tack Yoo, Hoon Jae Ki, Soo Won Kim

Research output: Contribution to journalConference articlepeer-review


Since a switched-capacitor sample-and-hold amplifier (SHA) has a feedback loop outside its op-amp, an op-amp with positive feedback technique (PFT) can be adopted to enhance the DC-gain of the op-amp. This paper proposes a positive feedback amplifier with dramatically increased DC-gain of 127-dB and reports that a SHA adopting proposed amplifier is stable by feedback operation. Measurement results demonstrated stable operation with spurious free dynamic range (SFDR) of 70- dB.

Original languageEnglish
Article number93
Pages (from-to)844-851
Number of pages8
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume5837 PART II
Publication statusPublished - 2005
EventVLSI Circuits and Systems II - Seville, Spain
Duration: 2005 May 92005 May 11


  • Operational amplifier
  • Positive feedback technique
  • Sample-and-hold amplifier

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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