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By J. M. Cruz, L. O. Chua (auth.), Leon O. Chua, Glenn Gulak, Edmund Pierzchala, Angel Rodríguez-Vázquez (eds.)

Cellular Neural Networks and Analog VLSI brings jointly in a single position vital contributions and up to date study ends up in this fast paced region.
Cellular Neural Networks and Analog VLSI serves as a great reference, offering perception into probably the most demanding examine matters within the field.

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This simplified model is a partiCUlarization of the ISR CNN model (Improved Signal Range) formalized in [4] and [11]. The VLSI implementations described in [3, 5, 7] can also be identified as particular cases of such a model. Moreover, a sigmoid-like function, instead of the conventional piecewise-linear function, is used to generate the cell output. The low-current operation of the circuits allows the use of small photo-sensors and reduces power consumption. The layout of the fabricated 8 x 8 CNN chip based on the circuits in Fig.

S. Espejo, "VLSI design and modeling of CNNs," PhD. Dissertation, University of Sevilla. March, 1994. 12. M. Anguita, F. J. Pelayo,F. J. Fernandez, andA. " To appear in IEEE Transactions on Circuits and Systems Part I. 13. M. Anguita, F. J. Pelayo, E. Ros, D. Palomar, and A. Prieto, "VLSI implementations of CNNs for image processing and vision tasks: Single and multiple chip approaches," invited talk at the 4th IEEE International Workshop on Cellular Neural Networks and their Applications. June, 1996.

Fig. 9. Layout of the excitatory synapse of Fig. 8. This occupies 60 x 60 /Lm2 excluding the section of membrane capacitance. Third, a circuit approach to approximate the continuous dynamics of an extended CNN model, in which input and output analog signals are represented by asynchronously produced short pulses, is proposed as a viable alternative for the implementation of large analog cellular structures. Due to the goal control of the circuit parameters, which are defined in terms of local ratios and to the use of an appropriate digital communication scheme that greatly reduces the number of required interconnections, with these of circuits a large cellular array of analog cells can be split into mUltiple chips, preserving the dynamics of the network as a whole.

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