Readout concept employing a novel on-chip 16-bit ADC for smart IR focal plane arrays

Ulf Ringh; Christer Jansson; Kevin Charles Liddiard

doi:10.1117/12.243528

26 June 1996 Readout concept employing a novel on-chip 16-bit ADC for smart IR focal plane arrays

Ulf Ringh, Christer Jansson, Kevin Charles Liddiard

Proceedings Volume 2745, Infrared Readout Electronics III; (1996) https://doi.org/10.1117/12.243528
Event: Aerospace/Defense Sensing and Controls, 1996, Orlando, FL, United States

Abstract

This paper discusses CMOS readout for an uncooled 2D IR array of resistance bolometers. Factors influencing the architectural choice and detailed noise considerations for the pixel select switch are covered. A parallel readout concept using one ADC per column is the suggested architecture for an uncooled CMOS IR array. In order to meet the requirement on speed and resolution a new ADC principle had to be developed. The ADC is however of general interest where resolution above 10 bits at medium speed and low cost are desired. High linearity is obtained utilizing the first- order delta-sigma converter technique, while resolution and speed is enhanced by a successive approximation of the delta-sigma integrator residual voltage. An experimental 16 X 16 infrared bolometer detector array has been designed where a row-by-row readout operation of the bolometer array is supported by a column-wise 16-bit A/D conversion. The 16- column preamplifiers and ADC structure has been implemented in a standard 0.8 micrometers CMOS process with 40 micrometers column pitch. Measured results of the experimental array is presented, including both electronics and detectors.

Citation Download Citation

Ulf Ringh, Christer Jansson, and Kevin Charles Liddiard "Readout concept employing a novel on-chip 16-bit ADC for smart IR focal plane arrays", Proc. SPIE 2745, Infrared Readout Electronics III, (26 June 1996); https://doi.org/10.1117/12.243528

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available