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利用MSPd30F149 单片机和AIM21电流环芯片，通过简单的压频转换(多谐振荡器)电路实现了基于电客式差压
传感器的智能差压变送器设计。该设计的特点是利用压频转换电路取代了A／D模块，以极低的产品价格达到了较高的
系统测量精度。采用软件与硬件相结合的信号处理技术，实现了基于HART协议现场总线技术的差压模拟量的测量，通
过进一步采用CPLD器件的量化延时测频技术，将可以达到比传统A／D器件更高的压力测量精度。智能差压变送器；HART协议现场总线；MSP430F149；AIM21
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交通灯控制器主要是利用了一个计数器芯片的计数，当计数器开始有稳定的秒脉冲输入时就开始计数，秒脉冲是用555多谐振荡器产生的，然后再通过各种门电路的逻辑组合实现最后的交通灯功能。-Traffic light controller is to use a counter chip count when the counter started a steady start when seconds count input pulse, second pulse is over 555 harmonic
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Nonlinear Dynamics From the Harmonic Oscillator to the Fractals
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Forced harmonic vibration
of a Duffing oscillator with
linear viscous damping
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We demonstrate a new approach to CARS spectroscopy by effi ciently syn- thesizing synchronized narrow-bandwidth (less than 10 cm− 1) pump and Stokes pulses (frequency diff erence continuously tunable upto ～3000 cm− 1) based on spec
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EG8010 is a digital pure sine wave inverter ASIC (Application Specific Integrated Circuit) with
complete function of built-in dead time control. It applies to DC-DC-AC two stage power converter
system or DC-AC single stage low power frequency tra
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