All-digital monolithic scanning readout based on sigma-delta analog-to-digital conversion

William J. Mandl; Carl M. Rutschow

doi:10.1117/12.60513

1 July 1992 All-digital monolithic scanning readout based on sigma-delta analog-to-digital conversion

William J. Mandl, Carl M. Rutschow

Proceedings Volume 1684, Infrared Readout Electronics; (1992) https://doi.org/10.1117/12.60513
Event: Aerospace Sensing, 1992, Orlando, FL, United States

Abstract

It is generally accepted that sensor systems can benefit from some form of on-focal-plane A/D conversion in terms of overall system noise improvement. The issue of whether or not the Delta-Sigma modulation process can be applied to the development of an approach using conventional A/D converters or cryogenic circuit materials is addressed from the standpoint of the scanning focal plane. Each pixel row of the scanning sensor is treated as a continuous analog signal source with a fixed signal bandwidth. By allocating a Delta-Sigma converter per sensor pixel row, theory predicts the oversample rate required to achieve the designed conversion resolution. The Delta-Sigma consists of two major parts. The modulator, which samples the analog input and develops a corresponding digital bit stream, and the digital signal processor, which compresses the bit stream into the Nyquist rate multibit codes and performs noise filtering, are described. Only the modulator needs to be on the focal plane since its output is digital. This reduces the development problem to one of fitting the modulator only into the allocated space and power budget per sensor.

Citation Download Citation

William J. Mandl and Carl M. Rutschow "All-digital monolithic scanning readout based on sigma-delta analog-to-digital conversion", Proc. SPIE 1684, Infrared Readout Electronics, (1 July 1992); https://doi.org/10.1117/12.60513

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