Download e-book for kindle: Digital Signal Processing Systems: Implementation by C. T. Leondes

By C. T. Leondes

ISBN-10: 0120127687

ISBN-13: 9780120127689

This quantity on implementation options in electronic sign processing structures in actual fact finds the importance and gear of the strategies which are on hand, and with additional improvement, the fundamental position they'll play as utilized to a large choice of components. The authors are all to hugely counseled for his or her correct individuals to this quantity, with the intention to supply an important and distinctive foreign reference resource for college kids, study staff, working towards engineers, and others for years yet to come.

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Extra resources for Digital Signal Processing Systems: Implementation Techniques, Volume 68: Advances in Theory and Applications

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10CPS/C would require 25ns access at 16Mbits or a depth 8 onchip pattern cache. Table 6 shows a variety of memory chips which can provide in excess of 10 CPS/C. However, if we wish to build a neural net capable of accelerated learning at 100• 10 CPS/C, Table 6 suggests that conventional memory chips do not yet have the desired bandwidth without a large (1K-pattern) on-chip pattern cache. Rambus Inc. [Ram92] has used a DRAM architecture with greatly enhanced throughput. They organize a DRAM core so 1024 bits can be latched at a time into an on-chip SRAM cache.

N - 1, Because each digit z~a,,~ in an SD number may take three different values {-1, 0, 1}, two bits are needed to represent each digit. However, only three states of the two bits are allowed. A way to code the two bits for a digit is as follows: Zsd+,n Zsd-,n T,sd,n 1 0 0 1 0 0 1 1 1 0 -1 not allowed 34 JAMES B. BURR ET AL. Because of this coding scheme, T,sd+, n and m,d-,~ are usually referred to as the positive bit and the negative bit of the n *h digit respectively. , introducing redundancy, can be a simple assignment operation as follows" Xsd+, 0 ~ O, Xad_,O ~ ~2c,0~ msd+,n -- m2c,n, msd-,,~ -- 0, for n - 1, 2, 3 , .

23 q, T mio io mioL ioL Figure 31" differential sense amplifier Figure 31 shows a high performance differential dense amplifier reported in [DLHP88], and recommended for use with 1T DRAMs. 24 J A M E S B. B U R R E 1 A L . J'-"]sw m12 _J_ mlO memory array bL dw2 dummy cell --L__J _L_ sdl dwl ~ c~ sense amp m4 | m5 outL cm2 L _ m-alI L l- cml r J 1~2 m7 m6 sense Figure 32- current mirror sense amplifier VLSI SIGNAL PROCESSING wd 25 wd _L ss _L_ memory array memory array ~ qpr \ ml ' mpl ' qpr m2 sense amp bL m 4 out 4 sense amp \ m3 7 m4 out Figure 33" single ended sense amplifier This sense amp has the nice property that the crosscoupled inverters automatically perform a refresh write after read.

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Digital Signal Processing Systems: Implementation Techniques, Volume 68: Advances in Theory and Applications by C. T. Leondes

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