Switched capacitor networks for focal plane image processing systems

Author

Umminger, Christopher B. ; Sodini, Charles G.

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., MIT, Cambridge, MA, USA

Volume

2

Issue

4

fYear

1992

fDate

12/1/1992 12:00:00 AM

Firstpage

392

Lastpage

400

Abstract

The use of switched capacitor (SC) networks as an alternative to large resistor networks for performing computations in VLSI circuits for real-time machine vision and image processing systems is investigated. A mapping can be made from any resistor network to an equivalent SC network that has the same node voltage solution in steady state. However, it takes several switching cycles for a charge to be distributed in the SC network before steady state is reached. Results indicate that SC networks can be used in moderate resolution systems (250×250 pixels) operating at video rate. A chip that implemented several switched capacitor networks for spatial smoothing of images in one dimension was fabricated and tested. The amount of spatial smoothing can be adjusted when the clocking scheme applied to the network is varied

Keywords

VLSI; computer vision; image processing; switched capacitor networks; SC network; VLSI circuits; clocking scheme; focal plane image processing systems; image smoothing; mapping; node voltage solution; real-time machine vision; resistor networks; spatial smoothing; steady state; switched capacitor networks; video rate; Computer networks; Computer vision; Image processing; Resistors; Smoothing methods; Steady-state; Switched capacitor circuits; Switched capacitor networks; Switching circuits; Very large scale integration;

fLanguage

English

Journal_Title

Circuits and Systems for Video Technology, IEEE Transactions on

Publisher

ieee

ISSN

1051-8215

Type

jour

DOI

10.1109/76.168904

Filename

168904