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课程设计，SQL写的一些说明，大家看看有需要没有。-curriculum design, SQL to write some note, we see no need.

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双直流电动机驱动集成电路，能控制直流电动机的正、反转及制动，驱动能力强，外围电路简单。-Dual DC motor driver integrated circuits, can be controlled by DC motor is, reverse and brake, driving ability, a simple peripheral circuits.

加性高斯白噪声信道下，OFDM系统仿真程序，调制方式为16QAM-additive white Gaussian noise channels, OFDM system simulation program, the modulation method for 16QAM

嵌入式系统c语言编程入门(5),关于c语言编程的书籍-C language programming of embedded systems portal (5), on c language programming books

发射部分采用锁相环式频率合成器技术， MC145152和MC12022芯片组成锁相环，将载波频率精确锁定在35MHz，输出载波的稳定度达到4×10-5，准确度达到3×10-5，由变容二极管V149和集成压控振荡器芯片MC1648实现对载波的调频调制；末级功放选用三极管2SC1970，使其工作在丙类放大状态，提高了放大器的效率，输出功率达到设计要求。-Part of the launch phase-locked loop frequency synthesizer using technology, MC145152 and MC12022 PLL chips to lock in the exact carrier frequency 35MHz, the output carrier to achieve the stability of 4 × 10-5, reaching the accuracy of 3 × 10-5 by the varactor diode V149 and integration to achieve MC1648 chip VCO FM modulation on the carrier selection transistor amplifier at the end of class 2SC1970, to work in the C state to enlarge and improve the efficiency of the amplifier output power to meet the design requirements.

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