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Proceedings Paper

10-bit 100-MS/s sample-and-hold amplifier adopting positive feedback technique
Author(s): Gil-Su Kim; Jae-Tack Yoo; Hoon-Jae Ki; Soo-Won Kim
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Paper Abstract

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.

Paper Details

Date Published: 30 June 2005
PDF: 8 pages
Proc. SPIE 5837, VLSI Circuits and Systems II, (30 June 2005); doi: 10.1117/12.608554
Show Author Affiliations
Gil-Su Kim, Korea Univ. (South Korea)
Jae-Tack Yoo, Anyang Univ. (South Korea)
Hoon-Jae Ki, Samsung Electronics Co. Ltd. (South Korea)
Soo-Won Kim, Korea Univ. (South Korea)

Published in SPIE Proceedings Vol. 5837:
VLSI Circuits and Systems II
Jose Fco. Lopez; Francisco V. Fernandez; Jose Maria Lopez-Villegas; Jose M. de la Rosa, Editor(s)

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