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

doi:10.1117/12.608554

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

* Honorary professors

Research output: Contribution to journal › Conference article › peer-review

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.

Original language	English
Article number	93
Pages (from-to)	844-851
Number of pages	8
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	5837 PART II
DOIs	https://doi.org/10.1117/12.608554
Publication status	Published - 2005
Event	VLSI Circuits and Systems II - Seville, Spain Duration: 2005 May 9 → 2005 May 11

Keywords

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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10.1117/12.608554

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

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.",

keywords = "Operational amplifier, Positive feedback technique, Sample-and-hold amplifier",

author = "Kim, {Gil Su} and Yoo, {Jae Tack} and Ki, {Hoon Jae} and Kim, {Soo Won}",

year = "2005",

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language = "English",

volume = "5837 PART II",

pages = "844--851",

journal = "Proceedings of SPIE - The International Society for Optical Engineering",

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note = "VLSI Circuits and Systems II ; Conference date: 09-05-2005 Through 11-05-2005",

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AU - Kim, Gil Su

AU - Yoo, Jae Tack

AU - Ki, Hoon Jae

AU - Kim, Soo Won

PY - 2005

Y1 - 2005

N2 - 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.

AB - 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.

KW - Operational amplifier

KW - Positive feedback technique

KW - Sample-and-hold amplifier

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JO - Proceedings of SPIE - The International Society for Optical Engineering

JF - Proceedings of SPIE - The International Society for Optical Engineering

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T2 - VLSI Circuits and Systems II

Y2 - 9 May 2005 through 11 May 2005

ER -

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

Abstract

Keywords

ASJC Scopus subject areas

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