The optimization of the process of physical education teaching and the improving of the teaching efficiency is the important goal of physical education, and is also the basic way to improve the teaching quality. With ...The optimization of the process of physical education teaching and the improving of the teaching efficiency is the important goal of physical education, and is also the basic way to improve the teaching quality. With the rapid development of modem information technology, multimedia technology has been widely used in teaching. It is proved by practice that the application of multimedia technology in the physical education teaching process has had a positive impact on the teachers, the students and the teaching contents, which not only can effectively break through the teaching difficulties, but also has played a multiplier effect on the students＇ understanding and grasping of sports technical movements, and the efficiency and benefit of classroom teaching. Combined with the multimedia technology, we can also implement the sports appreciation teaching more effective, which can not only broaden students＇ vision of sports, but also can make the students＇ ability of physical appreciation and comprehensive physical quality further improved, to make the students active form and develop ＂lifelong sports＂ consciousness.展开更多
This paper presents a VHF（30-300 MHz） RF programmable gain amplifier（PGA） with an adaptive phase correction technique.The proposed technique effectively mitigates phase errors over the VHF band,and the RFPGA as a ...This paper presents a VHF（30-300 MHz） RF programmable gain amplifier（PGA） with an adaptive phase correction technique.The proposed technique effectively mitigates phase errors over the VHF band,and the RFPGA as a whole satisfies all the specifications of the China mobile multimedia broadcasting VHF band applications.The RFPGA is implemented with a TSMC 0.25μm CMOS process.Measurement results reveal a gain range of around 61 dB,an ⅡP3 of-7 dBm at maximum gain,a power consumption of 10.2 mA at maximum gain,and a phase imbalance of less than 0.3 degrees.展开更多
文摘The optimization of the process of physical education teaching and the improving of the teaching efficiency is the important goal of physical education, and is also the basic way to improve the teaching quality. With the rapid development of modem information technology, multimedia technology has been widely used in teaching. It is proved by practice that the application of multimedia technology in the physical education teaching process has had a positive impact on the teachers, the students and the teaching contents, which not only can effectively break through the teaching difficulties, but also has played a multiplier effect on the students＇ understanding and grasping of sports technical movements, and the efficiency and benefit of classroom teaching. Combined with the multimedia technology, we can also implement the sports appreciation teaching more effective, which can not only broaden students＇ vision of sports, but also can make the students＇ ability of physical appreciation and comprehensive physical quality further improved, to make the students active form and develop ＂lifelong sports＂ consciousness.
文摘This paper presents a VHF（30-300 MHz） RF programmable gain amplifier（PGA） with an adaptive phase correction technique.The proposed technique effectively mitigates phase errors over the VHF band,and the RFPGA as a whole satisfies all the specifications of the China mobile multimedia broadcasting VHF band applications.The RFPGA is implemented with a TSMC 0.25μm CMOS process.Measurement results reveal a gain range of around 61 dB,an ⅡP3 of-7 dBm at maximum gain,a power consumption of 10.2 mA at maximum gain,and a phase imbalance of less than 0.3 degrees.
