针对单端四端浮地零器(FTFN:Four-Term inal F loating Nu llor)具有不适合应用于模数混合电路的缺点,提出了一种全平衡式四端浮地零器(FBFTFN:Fu lly Balanced Four-Term inal F loating Nu llor)及CMOS(Comp le-m entaryM etal-Oxide ...针对单端四端浮地零器(FTFN:Four-Term inal F loating Nu llor)具有不适合应用于模数混合电路的缺点,提出了一种全平衡式四端浮地零器(FBFTFN:Fu lly Balanced Four-Term inal F loating Nu llor)及CMOS(Comp le-m entaryM etal-Oxide Sem iconductor)电路实现。FBFTFN采用全平衡式结构,比单端FTFN通用性更强,应用更灵活;运用FBFTFN实现了电流模式连续时间五阶跳耦结构的滤波器。该滤波器采用5个有源元件数目,结构简单,所有电容,电阻都接地,适于全集成和模数混合电路。通过面向设计电路完成MOS管级的PSPICE(Personal S imu lation Program w ith Integrated)仿真,结果表明设计方案是可行的。展开更多
The effects of different time-independent and time-dependent couplings on two-atom entanglement are studied. The results show that the effects depend on the initial state. For the initial state |eeO〉, it is found th...The effects of different time-independent and time-dependent couplings on two-atom entanglement are studied. The results show that the effects depend on the initial state. For the initial state |eeO〉, it is found that different time-independent couplings make the case without entanglement exhibit entanglement, and time-dependent couplings turn the irregular entanglement regions into regular one. Under the case of decay, for the initial state |eg0〉, the different time-dependent couplings have disbenefit.展开更多
文摘针对单端四端浮地零器(FTFN:Four-Term inal F loating Nu llor)具有不适合应用于模数混合电路的缺点,提出了一种全平衡式四端浮地零器(FBFTFN:Fu lly Balanced Four-Term inal F loating Nu llor)及CMOS(Comp le-m entaryM etal-Oxide Sem iconductor)电路实现。FBFTFN采用全平衡式结构,比单端FTFN通用性更强,应用更灵活;运用FBFTFN实现了电流模式连续时间五阶跳耦结构的滤波器。该滤波器采用5个有源元件数目,结构简单,所有电容,电阻都接地,适于全集成和模数混合电路。通过面向设计电路完成MOS管级的PSPICE(Personal S imu lation Program w ith Integrated)仿真,结果表明设计方案是可行的。
基金The project supported by National Natural Science Foundation of China under Grant Nos. 10347103 and 10305002 and the Natural Science Foundation of Liaoning Province under Grant No. 20031073
文摘The effects of different time-independent and time-dependent couplings on two-atom entanglement are studied. The results show that the effects depend on the initial state. For the initial state |eeO〉, it is found that different time-independent couplings make the case without entanglement exhibit entanglement, and time-dependent couplings turn the irregular entanglement regions into regular one. Under the case of decay, for the initial state |eg0〉, the different time-dependent couplings have disbenefit.