介绍了EWB(Electronic Work Bench)软件的特点,给出了高阶有源滤波器设计的一般思路,用EWB软件设计出五阶巴特沃斯低通滤波器,其电路简单明了,参数容易确定,且电路调试方便。并且通过实际电路实验证明设计方法合理,设计出的滤波器满足...介绍了EWB(Electronic Work Bench)软件的特点,给出了高阶有源滤波器设计的一般思路,用EWB软件设计出五阶巴特沃斯低通滤波器,其电路简单明了,参数容易确定,且电路调试方便。并且通过实际电路实验证明设计方法合理,设计出的滤波器满足技术指标。该有源滤波器设计方法对信号处理,通信及检测技术方面有实用价值。展开更多
The impedance of a solid state active phased array antenna varing with frequency and beam scanning scanning angle be matched with the solid state active matching network (SSAMN). In order to adjust and measure the rad...The impedance of a solid state active phased array antenna varing with frequency and beam scanning scanning angle be matched with the solid state active matching network (SSAMN). In order to adjust and measure the radar conveniently and Securely, it is necessary for the impedance of the simulator of the phased array antennas to be optimized.Having selected the PIN dilde controlling circuits and the circuit parameters optimized,the simulator circuit is determined through numerical computation The experiment is given in support of the simulation.展开更多
An optimal configuration of the flux-reversal linear synchronous motor (FRLSM) with the optimal number of attachment permanent magnets (PMs) was presented. The optimal model of 2 000 N was designed to reduce the deten...An optimal configuration of the flux-reversal linear synchronous motor (FRLSM) with the optimal number of attachment permanent magnets (PMs) was presented. The optimal model of 2 000 N was designed to reduce the detent force by redesigning the air-gap structure and skewing. The design parameters,mover PMs and stator core,were selected for optimal design by DOE. The thrust and the detent force of the designed optimal models were compared by finite element analysis (FEA). As a result,the thrust of the optimal model is slightly decreased by 1.97% compared with the basic model,and the detent force of the optimal model is greatly decreased by 88.47% compared with the basic model.展开更多
This work presents the design and control of the DAB （dual active bridge） converter employing gyrator＇s theory. A brief summary of the theory is introduced, and its application for the DAB converter is verified wit...This work presents the design and control of the DAB （dual active bridge） converter employing gyrator＇s theory. A brief summary of the theory is introduced, and its application for the DAB converter is verified with a design example. After that, it develops the control and show results of simulations and experiment. Though the commutation not is studied, the advantage of method is the easy way for project and control of the DAB converter.展开更多
An active-RC low-pass filter of 5MHz cutoff frequency with a tuning architecture is proposed. It is implemented in 0. 18μm standard CMOS technology. The accuracy of the tuning system is improved to be within （ - 1.2...An active-RC low-pass filter of 5MHz cutoff frequency with a tuning architecture is proposed. It is implemented in 0. 18μm standard CMOS technology. The accuracy of the tuning system is improved to be within （ - 1.24%, ＋ 2.16%） in measurement. The chip area of the tuning system is only a quarter of that of the main-filter. After tuning is completed, the tuning system will be turned off automatically to save power and to avoid interference. The in-band 3rd order harmonic input intercept point （IIP3） is larger than 16. ldBm, with 50Ω as the source impedance. The input referred noise is about 36μVrms The measured group delay variation of the filter between 3 and 5MHz is only 24ns,and the filter power consump- tion is 3.6roW. This filter with the tuning system is realized easily and can be used in many wireless low-IF receiver applications, such as global position systems （GPS）, global system for mobile communications （GSM） and code division multiple access （CDMA） chips.展开更多
文摘介绍了EWB(Electronic Work Bench)软件的特点,给出了高阶有源滤波器设计的一般思路,用EWB软件设计出五阶巴特沃斯低通滤波器,其电路简单明了,参数容易确定,且电路调试方便。并且通过实际电路实验证明设计方法合理,设计出的滤波器满足技术指标。该有源滤波器设计方法对信号处理,通信及检测技术方面有实用价值。
文摘The impedance of a solid state active phased array antenna varing with frequency and beam scanning scanning angle be matched with the solid state active matching network (SSAMN). In order to adjust and measure the radar conveniently and Securely, it is necessary for the impedance of the simulator of the phased array antennas to be optimized.Having selected the PIN dilde controlling circuits and the circuit parameters optimized,the simulator circuit is determined through numerical computation The experiment is given in support of the simulation.
基金Work supported by the Second Stage of Brain Korea 21 Projects
文摘An optimal configuration of the flux-reversal linear synchronous motor (FRLSM) with the optimal number of attachment permanent magnets (PMs) was presented. The optimal model of 2 000 N was designed to reduce the detent force by redesigning the air-gap structure and skewing. The design parameters,mover PMs and stator core,were selected for optimal design by DOE. The thrust and the detent force of the designed optimal models were compared by finite element analysis (FEA). As a result,the thrust of the optimal model is slightly decreased by 1.97% compared with the basic model,and the detent force of the optimal model is greatly decreased by 88.47% compared with the basic model.
文摘This work presents the design and control of the DAB （dual active bridge） converter employing gyrator＇s theory. A brief summary of the theory is introduced, and its application for the DAB converter is verified with a design example. After that, it develops the control and show results of simulations and experiment. Though the commutation not is studied, the advantage of method is the easy way for project and control of the DAB converter.
文摘An active-RC low-pass filter of 5MHz cutoff frequency with a tuning architecture is proposed. It is implemented in 0. 18μm standard CMOS technology. The accuracy of the tuning system is improved to be within （ - 1.24%, ＋ 2.16%） in measurement. The chip area of the tuning system is only a quarter of that of the main-filter. After tuning is completed, the tuning system will be turned off automatically to save power and to avoid interference. The in-band 3rd order harmonic input intercept point （IIP3） is larger than 16. ldBm, with 50Ω as the source impedance. The input referred noise is about 36μVrms The measured group delay variation of the filter between 3 and 5MHz is only 24ns,and the filter power consump- tion is 3.6roW. This filter with the tuning system is realized easily and can be used in many wireless low-IF receiver applications, such as global position systems （GPS）, global system for mobile communications （GSM） and code division multiple access （CDMA） chips.
