Ring Amplifiers for Switched Capacitor Circuits

Hershberg, Benjamin; Weaver, Skyler; Sobue, Kazuki; Takeuchi, Seiji; Hamashita, Koichi; Moon, Un-Ku

Citeable URL: https://ir.library.oregonstate.edu/concern/articles/mg74qn26j

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Attribute Name	Values
Creator	Hershberg, Benjamin Weaver, Skyler Sobue, Kazuki Takeuchi, Seiji Hamashita, Koichi Moon, Un-Ku
Abstract	In this paper the fundamental concept of ring amplification is introduced and explored. Ring amplifiers enable efficient amplification in scaled environments, and possess the benefits of efficient slew-based charging, rapid stabilization, compression-immunity (inherent rail-to-rail output swing), and performance that scales with process technology. A basic operational theory is established, and the core benefits of this technique are identified. Measured results from two separate ring amplifier based pipelined ADCs are presented. The first prototype IC, a simple 10.5-bit, 61.5dB SNDR pipelined ADC which uses only ring amplifiers, is used to demonstrate the core benefits. The second fabricated IC presented is a high-resolution pipelined ADC which employs the technique of Split-CLS to perform efficient, accurate amplification aided by ring amplifiers. The 15-bit ADC is implemented in a 0.18 μm CMOS technology and achieves 76.8 dB SNDR and 95.4 dB SFDR at 20 Msps while consuming 5.1 mW, achieving a FoM of 45 fJ/conversion-step. Keywords: correlated level shifting, analog to digital conversion, analog to digital converter, slew-based, RAMP, rail-to-rail, ring amplification, ADC, CLS, ringamp, A/D, low power, ring amp, scaling, Split-CLS, ring amplifier, high resolution, switched-capacitor, scalability, stabilized ring oscillator, nanoscale CMOS
Resource Type	Article
DOI	https://doi.org/10.1109/JSSC.2012.2217865
Date Available	2013-03-01T22:20:00+00:00
Date Issued	2012-12
Citation	Hershberg, B., Weaver, S., Sobue, K., Takeuchi, S., Hamashita, K., & Moon, U. (2012). Ring amplifiers for switched capacitor circuits. IEEE Journal of Solid-State Circuits, 47(12): 2928-2942.
Journal Title	IEEE Journal of Solid-State Circuits
Journal Volume	47
Journal Issue/Number	12
Rights Statement	Copyright Not Evaluated
Funding Statement (additional comments about funding)	The authors would like to thank Asahi Kasei Microdevices for supporting this research.
Publisher	IEEE
Peer Reviewed	Yes
Language	English [eng]
Replaces	http://hdl.handle.net/1957/37258
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