An Emulated Digital CNN Implementation

A new emulated digital CNN Universal Machine chip architecture is introduced and the main steps of the design process are shown in this paper. One core processor can be implemented on 2 × 2 mm2 silicon area with a 0.35 μm CMOS technology. Assuming an array of 24 processors on a chip, its speed is 1ns/virtual cell/CNN iteration with 12 bit precision. This enables the execution of over five hundred 3 × 3 convolution operations on each frame of a 240 × 320-pixel 25 fps digital image flow. Another new feature of the design is its variable precision capability. This allows the user to trade off precision for speed. The architecture supports some non-linear filter implementation as well.

[1]  A. Rodriguez-Vazquez,et al.  A 64/spl times/64 CNN universal chip with analog and digital I/O , 1998, 1998 IEEE International Conference on Electronics, Circuits and Systems. Surfing the Waves of Science and Technology (Cat. No.98EX196).

[2]  S. I. Andersson.  Recent progress on logic and algorithms for optical neural networks (ONN) , 1998, 1998 Fifth IEEE International Workshop on Cellular Neural Networks and their Applications. Proceedings (Cat. No.98TH8359).

[3]  Lin-Bao Yang,et al.  Cellular neural networks: theory , 1988 .

[4]  Kuei-Ann Wen,et al.  VLSI Design of Digital Cellular Neural Networks for Image Processing , 1994, J. Vis. Commun. Image Represent..

[5]  S. Espejo,et al.  Challenges in mixed-signal IC design of CNN chips in submicron CMOS , 1998, 1998 Fifth IEEE International Workshop on Cellular Neural Networks and their Applications. Proceedings (Cat. No.98TH8359).

[6]  Tamás Roska,et al.  The CNN universal machine: an analogic array computer , 1993 .

[7]  S. Espejo,et al.  A CNN universal chip in CMOS technology , 1994, Proceedings of the Third IEEE International Workshop on Cellular Neural Networks and their Applications (CNNA-94).

[8]  L.O. Chua,et al.  Cellular neural networks , 1993, 1988., IEEE International Symposium on Circuits and Systems.

[9]  A. Zarandy,et al.  An emulated digital architecture implementing the CNN Universal Machine , 1998, 1998 Fifth IEEE International Workshop on Cellular Neural Networks and their Applications. Proceedings (Cat. No.98TH8359).

[10]  Manfred Glesner,et al.  Realisation of a digital cellular neural network for image processing , 1994, Proceedings of the Third IEEE International Workshop on Cellular Neural Networks and their Applications (CNNA-94).

[11]  Bruce A. Wooley,et al.  A Two's Complement Parallel Array Multiplication Algorithm , 1973, IEEE Transactions on Computers.