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A multibit modulator in floating-body silicon-on-sapphire for extreme radiation environments

A multibit modulator in floating-body silicon-on-sapphire for extreme radiation environments
A multibit modulator in floating-body silicon-on-sapphire for extreme radiation environments
This paper presents the design of an experimental first-order modulator with 4-bit internal quantization, fabricated in a 1.5-um space-qualified radiation-hard partially depleted silicon-on-sapphire (SOS) digital CMOS process. This converter architecture has been chosen partly to allow investigation into the design of a range of common analog functions with two key issues in mind: one of technology and one environmental. First, both the architecture and the circuit design are optimized using a variety of unconventional techniques to account for the influence of extreme bias-dependent, radiation-induced threshold-voltage shifts of up to 1 V, as well as poort 1/f device noise. Second, the circuitry is specially adapted to accommodate the floating-body behaviour of this type of process, wherein drain conductance varies considerably with drain bias and frequency. The design techniques are directly applicable to very large-scale-integration silicon-on-insulator (SOI) design, where similar device physics are encountered. Notwithstanding the severe constraints on the design, the fabricated circuit provides 9.7 bits of dynamic range in a 63-kHz signal bandwidth, only degrading to 9.1 bits after 23 Mrad(Si) of total dose v radiation.
937-948
Edwards, C. F.
71a5b071-582c-45d1-91a6-b50366b5c46c
Redman-White, W.
d5376167-c925-460f-8e9c-13bffda8e0bf
Bracey, M.
66559002-8d42-41c2-ab67-539895677094
Tenbroek, B. M.
321ed915-008d-4218-9564-57e061886804
Lee, M. S. L.
6460a2db-498f-49de-b52e-9c134b9cf54d
Uren, M. J.
98cd13fc-b6fa-4126-8ef3-f5fc8be04710
Edwards, C. F.
71a5b071-582c-45d1-91a6-b50366b5c46c
Redman-White, W.
d5376167-c925-460f-8e9c-13bffda8e0bf
Bracey, M.
66559002-8d42-41c2-ab67-539895677094
Tenbroek, B. M.
321ed915-008d-4218-9564-57e061886804
Lee, M. S. L.
6460a2db-498f-49de-b52e-9c134b9cf54d
Uren, M. J.
98cd13fc-b6fa-4126-8ef3-f5fc8be04710

Edwards, C. F., Redman-White, W., Bracey, M., Tenbroek, B. M., Lee, M. S. L. and Uren, M. J. (1999) A multibit modulator in floating-body silicon-on-sapphire for extreme radiation environments. European Solid State Circuits Conference, Netherlands. 22 - 24 Sep 1998. pp. 937-948 .

Record type: Conference or Workshop Item (Paper)

Abstract

This paper presents the design of an experimental first-order modulator with 4-bit internal quantization, fabricated in a 1.5-um space-qualified radiation-hard partially depleted silicon-on-sapphire (SOS) digital CMOS process. This converter architecture has been chosen partly to allow investigation into the design of a range of common analog functions with two key issues in mind: one of technology and one environmental. First, both the architecture and the circuit design are optimized using a variety of unconventional techniques to account for the influence of extreme bias-dependent, radiation-induced threshold-voltage shifts of up to 1 V, as well as poort 1/f device noise. Second, the circuitry is specially adapted to accommodate the floating-body behaviour of this type of process, wherein drain conductance varies considerably with drain bias and frequency. The design techniques are directly applicable to very large-scale-integration silicon-on-insulator (SOI) design, where similar device physics are encountered. Notwithstanding the severe constraints on the design, the fabricated circuit provides 9.7 bits of dynamic range in a 63-kHz signal bandwidth, only degrading to 9.1 bits after 23 Mrad(Si) of total dose v radiation.

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More information

Published date: 1999
Additional Information: Event Dates: 22-24 September 1998
Venue - Dates: European Solid State Circuits Conference, Netherlands, 1998-09-22 - 1998-09-24
Organisations: Nanoelectronics and Nanotechnology

Identifiers

Local EPrints ID: 259905
URI: https://eprints.soton.ac.uk/id/eprint/259905
PURE UUID: f0c213fb-58e2-4d56-8437-8da5651295f9

Catalogue record

Date deposited: 03 Sep 2004
Last modified: 18 Jul 2017 09:18

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Contributors

Author: C. F. Edwards
Author: W. Redman-White
Author: M. Bracey
Author: B. M. Tenbroek
Author: M. S. L. Lee
Author: M. J. Uren

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