We consider design of hardware realizations of optoelectronic reconfigurable universal or multifunctional logical elements of two-valued logic with current inputs and current outputs on the basis of CMOS current mirro...
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ISBN:
(纸本)9780819485755
We consider design of hardware realizations of optoelectronic reconfigurable universal or multifunctional logical elements of two-valued logic with current inputs and current outputs on the basis of CMOS current mirrors and circuits which realize the limited difference functions. We show advantages of such elements consisting in encoding of Boolean variables by the photocurrent levels, that allows easily to provide optical inputs (by photodetectors) and optical outputs (by light-emitting devices). The conception of construction of the family of the offered optoelectronic photocurrent reconfigurable universal or multifunctional logical elements (OPR ULE) consists in the use of a current mirrors realized on 1.5 mu m or 0.35 mu m technology CMOS transistors. Presence of 15-30 transistors, 1 divided by 4 photodetectors makes the offered circuits quite compact and allows their integration in 1D and 2D arrays. In the presentation we consider the whole family of the offered circuits, show the simulation results and possible prospects of application of the circuits in particular for time-pulsecoding for multivalued, continuous, neuro-fuzzy and matrix logics. The simulation results of the NOT, AND, OR, OR-NOT, XOR current logical elements and OPR ULE on the 1.5 mu m or 0.35 mu m technology CMOS transistors showed that the level of logical unit can change from 1 mu A to 10 mu A for low-power consumption variants and from 10 mu A to 100 mu A for high-speed variants. Signals delays, values of fronts and cutoffs at operation with impulse logical signals with 1uA logical unit are not exceed 70-140 ns and at operation with impulse logical signals with 100 mu A logical unit are no more than 4-6 ns and the consumption power is 100-4000 mu W.
Fast and high-performance vector processors operating in neuro-fuzzy, multivalued, hybrid etc. logics, and structures which implement max/min production of convolution with phasification and dephasification are necess...
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ISBN:
(纸本)0819457981
Fast and high-performance vector processors operating in neuro-fuzzy, multivalued, hybrid etc. logics, and structures which implement max/min production of convolution with phasification and dephasification are necessary for hardware decisions of many intelligent problems. We show results of design of such optoelectronic scalar-relation vector processors (SRVP) with time-pulsecoding. We consider the concept of such SRVP build-up as base cells for homogeneous 1D and 2D computing mediums. The conception is founded on the use of advantages of time-pulsecoding in hardware embodyings of multichannel devices of analog neurobiologic and time-pulse photoconverters. The two-stage structure of the SRVP mapping generalized mathematical model of quasiuniversal map of the relation between two vectors is designed on the basis of the mathematical base which includes the generalized operations of equivalence (nonequivalence), generalized operations of t-norm and s-norm of neuro-fuzzy logic. It is shown that the application of time-pulsecoding allows to use quasiuniversal elements of two-valued logic as base blocks on both cascades of the processor. Four-input universal logical elements of two-valued logic (ULE TVL) with direct and complement outputs are used for vectors analog components processing by the first cascade of the SRVP. In a modified variant the ULE TVL have direct and inverse digital outputs for direct and complement time-pulse outputs and are supplied with additional optical signals conversion drivers. The ULE TVL of the second cascade has 2n or 4n inputs, where n - dimension of treated vectors. The circuits of the ULE TVL are considered on the basis of parallel analog-todigital converters and digital circuits implemented on CMOS transistors, have optical inputs and outputs, and have following characteristics: realized on 1.5 mu m technology CMOS transistors;the input currents range - 100nA... 100 mu A;the supply voltage - 3... 15V;the relative error is less than 0
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