This paper analyses the transient characteristics of high temperature CMOS inverters and gate circuits, and gives the computational formulas of their rise time, fall time and delay time. It may be concluded that the t...This paper analyses the transient characteristics of high temperature CMOS inverters and gate circuits, and gives the computational formulas of their rise time, fall time and delay time. It may be concluded that the transient characteristics of CMOS inverters and gate circuits deteriorate due to the reduction of carrier mobilities and threshold voltages of MOS transistors and the increase of leakage currents of MOS transistors drain terminal pn junctions. The calculation results can explain the experimental phenomenon.展开更多
In this research, a fast methodology to calculate the exact value of the average dynamic power consumption for CMOS combinational logic circuits is developed. The delay model used is the unit-delay model where all gat...In this research, a fast methodology to calculate the exact value of the average dynamic power consumption for CMOS combinational logic circuits is developed. The delay model used is the unit-delay model where all gates have the same propagation delay. The main advantages of this method over other techniques are its accuracy, as it is deterministic and it requires less computational effort compared to exhaustive simulation approaches. The methodology uses the Logic Pictures concept for obtaining the nodes’ toggle rates. The proposed method is applied to well-known circuits and the results are compared to exhaustive simulation and Monte Carlosimulation methods.展开更多
By analysing problems in the traditional design theory of digital circuits it is proposed that both switching variable and signal variable should be adopted for describing the switching state of internal elements and ...By analysing problems in the traditional design theory of digital circuits it is proposed that both switching variable and signal variable should be adopted for describing the switching state of internal elements and signal in digital circuits respectively.Based on the above viewpoint the switch-signal theory is established.According to the working principle in CMOS circuits,the related design technique at switch level is developed.By using the practical design examples it is shown that the circuits designed at switch level have simpler structures than their counterparts designed at the traditional gate level since the switch transistors are used as construction units in designs.展开更多
基金Supported by the National Native Science Foundation of China
文摘This paper analyses the transient characteristics of high temperature CMOS inverters and gate circuits, and gives the computational formulas of their rise time, fall time and delay time. It may be concluded that the transient characteristics of CMOS inverters and gate circuits deteriorate due to the reduction of carrier mobilities and threshold voltages of MOS transistors and the increase of leakage currents of MOS transistors drain terminal pn junctions. The calculation results can explain the experimental phenomenon.
文摘In this research, a fast methodology to calculate the exact value of the average dynamic power consumption for CMOS combinational logic circuits is developed. The delay model used is the unit-delay model where all gates have the same propagation delay. The main advantages of this method over other techniques are its accuracy, as it is deterministic and it requires less computational effort compared to exhaustive simulation approaches. The methodology uses the Logic Pictures concept for obtaining the nodes’ toggle rates. The proposed method is applied to well-known circuits and the results are compared to exhaustive simulation and Monte Carlosimulation methods.
基金Project supported by the National Natural Science Foundation of China.
文摘By analysing problems in the traditional design theory of digital circuits it is proposed that both switching variable and signal variable should be adopted for describing the switching state of internal elements and signal in digital circuits respectively.Based on the above viewpoint the switch-signal theory is established.According to the working principle in CMOS circuits,the related design technique at switch level is developed.By using the practical design examples it is shown that the circuits designed at switch level have simpler structures than their counterparts designed at the traditional gate level since the switch transistors are used as construction units in designs.
