Ahmed Dessouky - Academia.edu (original) (raw)
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Papers by Ahmed Dessouky
Domino CMOS logic finds a wide variety of applications due to their high speed and low device cou... more Domino CMOS logic finds a wide variety of applications due to their high speed and low device count. In conventional CMOS domino logic, either the dynamic-node capacitor, CL is precharged to VDD during the precharge phase or predischarged to 0 V. The first precharging scheme is more suitable when logic "0" occurrence is more probable at the output due to the large saving in power consumption. On the other hand, the second predischarging scheme is more suitable when logic "1" is more probable at the output. In this paper, we will propose a novel technique to speed up the operation and minimize power consumption when there is an equal probability of occurrence of logic "0" and logic "1". This technique depends on precharging the dynamic node to VDD/2 instead of VDD during the precharge phase. Then, during the evaluation phase, the dynamic-node voltage will be either increased to VDD or decreased to 0 V depending on the state of the inputs. This, of course, saves much of the time and power consumption because discharging the dynamic node from VDD/2 to 0 V is much faster and consumes less power consumption than discharging it from VDD to 0 V. Also, the discharging process and noise margin will be enhanced by virtue of the fact that the time interval during which the keeper combats the discharging process is relatively very small. The proposed technique will be simulated for the 0.13 mum technology with VDD=1.2 V. Simulation results show that about 75% was shaved from the cycle time for the case of "0" and "1" outputs at the expense of an additional silicon area.
Journal of Polymer Science Part A-polymer Chemistry, 1992
Direct radiation-induced grafting of aqueous acrylic acid (AAc) onto poly(tetrafluoroethylene-eth... more Direct radiation-induced grafting of aqueous acrylic acid (AAc) onto poly(tetrafluoroethylene-ethylene) (ET) film has been studied. The effect of grafting conditions such as monomer concentration, exposure dose, dose rate, and film thickness on the grafting yield was investigated. The dependence of the grafting rate on monomer concentration was found to be 1.2 order. The dependence of the grafting rate on dose rate was found to be 0.6 order regardless of the film thickness. The relationship between the grafting rate and film thickness gave a negative first-order dependence. The results suggest that the grafting process is mainly controlled by monomer diffusion, and it was concluded that this grafting system proceeded by the front mechanism. The swelling behavior increases linearly with degree of grafting. The electrical conductivity and mechanical properties for the trunk and grafted polymer were investigated at different irradiation doses in air and under vacuum irradiations. © 1992 John Wiley & Sons, Inc.
Oral Oncology, 2000
This paper presents a model reference adaptive fuzzy speed controller for induction motor using t... more This paper presents a model reference adaptive fuzzy speed controller for induction motor using the auto-attentive approach. It consists of developing an adaptive controller that can track the change of the operating point and the plant parameters even in magnetic saturation mode. The adaptive mechanism should be fast enough for all the tracking process. The proposed approach helps to increase the accuracy of the controller around the set point and keep the number of the roles in the rule-base as low as possible. This would minimize the computation complexity and enhance the system performance
Domino CMOS logic finds a wide variety of applications due to their high speed and low device cou... more Domino CMOS logic finds a wide variety of applications due to their high speed and low device count. In conventional CMOS domino logic, either the dynamic-node capacitor, CL is precharged to VDD during the precharge phase or predischarged to 0 V. The first precharging scheme is more suitable when logic "0" occurrence is more probable at the output due to the large saving in power consumption. On the other hand, the second predischarging scheme is more suitable when logic "1" is more probable at the output. In this paper, we will propose a novel technique to speed up the operation and minimize power consumption when there is an equal probability of occurrence of logic "0" and logic "1". This technique depends on precharging the dynamic node to VDD/2 instead of VDD during the precharge phase. Then, during the evaluation phase, the dynamic-node voltage will be either increased to VDD or decreased to 0 V depending on the state of the inputs. This, of course, saves much of the time and power consumption because discharging the dynamic node from VDD/2 to 0 V is much faster and consumes less power consumption than discharging it from VDD to 0 V. Also, the discharging process and noise margin will be enhanced by virtue of the fact that the time interval during which the keeper combats the discharging process is relatively very small. The proposed technique will be simulated for the 0.13 mum technology with VDD=1.2 V. Simulation results show that about 75% was shaved from the cycle time for the case of "0" and "1" outputs at the expense of an additional silicon area.
Journal of Polymer Science Part A-polymer Chemistry, 1992
Direct radiation-induced grafting of aqueous acrylic acid (AAc) onto poly(tetrafluoroethylene-eth... more Direct radiation-induced grafting of aqueous acrylic acid (AAc) onto poly(tetrafluoroethylene-ethylene) (ET) film has been studied. The effect of grafting conditions such as monomer concentration, exposure dose, dose rate, and film thickness on the grafting yield was investigated. The dependence of the grafting rate on monomer concentration was found to be 1.2 order. The dependence of the grafting rate on dose rate was found to be 0.6 order regardless of the film thickness. The relationship between the grafting rate and film thickness gave a negative first-order dependence. The results suggest that the grafting process is mainly controlled by monomer diffusion, and it was concluded that this grafting system proceeded by the front mechanism. The swelling behavior increases linearly with degree of grafting. The electrical conductivity and mechanical properties for the trunk and grafted polymer were investigated at different irradiation doses in air and under vacuum irradiations. © 1992 John Wiley & Sons, Inc.
Oral Oncology, 2000
This paper presents a model reference adaptive fuzzy speed controller for induction motor using t... more This paper presents a model reference adaptive fuzzy speed controller for induction motor using the auto-attentive approach. It consists of developing an adaptive controller that can track the change of the operating point and the plant parameters even in magnetic saturation mode. The adaptive mechanism should be fast enough for all the tracking process. The proposed approach helps to increase the accuracy of the controller around the set point and keep the number of the roles in the rule-base as low as possible. This would minimize the computation complexity and enhance the system performance