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A twin-model 1 x 16 cells Cellular Neural Network Chip
for Connected Component Detection
Team: Servando Espejo, Rafael Domínguez-Castro
and Ángel Rodríguez-Vázquez.
Date: 1992
| Physical Data |
- Technology: 1.6µ m CMOS n-well,
single-poly, double metal
- Cell density: 61 cells/mm2
for P1
- Cell density: 120 cells/mm2
for P2
- 74 transistors/cell for P1
- 42 transistors/cell for P2
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Electrical Data |
- 2.7 to 5.0 V Supply
- 300µ W/cell @ 5V for P1
- 100µ W/cell @ 5V for P2
- Voltage mode I/O
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Design Technique |
- Analog Current-Mode Continuous Time
- Full-custom
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Features and Applications |
- Selectable Boundary Conditions (+-1)
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This was the first of a series of specific-application
(fixed weight) Cellular Neural Network prototypes, in particular for the
application of Connected Component Detection (Fig 2), based on current-mode
techniques [Rodr93a], [Rodr93b],
[Espe94a]. Actually, the chip includes two different
prototypes, both of 1 X 16 cells, named P1 (Fig
3) and P2 (Fig 4). P1 implements the original Chua & Yang CNN model,
while P2 realizes a modification of the former model called FSR CNN model
[Espe94b], which results in some implementation advantages.
References:
- [Rodr93a] A. Rodríguez-Vázquez,
S. Espejo, R. Domínguez-Castro, J.L. Huertas, and E. Sánchez-Sinencio:
"Current-Mode Techniques for the Implementation of Continuous-
and Discrete-Time Cellular Neural Networks" IEEE Transactions on
Circuits and Systems II: Analog and Digital Signal Processing.Vol 40,
No. 3, pp 132-146, March 1993.
- [Rodr93b] A. Rodríguez-Vázquez,
S. Espejo, J.L. Huertas, and R. Domínguez-Castro: "Switched-Current
Cellular Neural Networks for Image Processing", Chapter 17, pp.
459-486 in C. Toumazou, J.B. Hughes and N.C. Battersby (Editors): "SWITCHED-CURRENTS
an analogue technique for digital technology", IEE Circuits and
Systems Series 5, Peter Peregrinus Ltd. 1993. ISBN: 0 86341 294 7.
- [Espe94a] S. Espejo,
A. Rodríguez-Vázquez, R. Domínguez-Castro, J.L.
Huertas, and E. Sánchez-Sinencio: "Smart-Pixel Cellular
Neural Networks in Analog Current-Mode CMOS Technology" IEEE Journal
of Solid-State Circuits.Vol 29, No. 8, pp 895-905, August 1994.
- [Espe94b] S. Espejo,
R. Carmona, R. Domínguez-Castro and A. Rodríguez-Vázquez:
"A VLSI-Oriented Continuous-Time CNN Model". International
Journal of Circuit Theory and Applications. Vol 24, No. 3, pp 341-356,
May-June 1996.
Images List:
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