外围输出控制系统由发光二极管、继电器、数字开关等模拟外围设备，控制其它的弱电设备和一般的强电设备。
The periphery output control system is composed of analog peripheral device such as LED, relay, digital switch etc, to control the other weak-current devices and general heavy-current devices.
用模拟电子元件和数字电子元件设计一种智能开关盒，介绍这种装置的作用和工作原理。
An intelligence switch box is designed by use of analogue electronic elements and digital electronic elements. The paper introduces the functions and working principle of the device.
频率通过用可编程器件EPLD控制，而脉冲信号的宽度和幅度通过多路模拟开关和数字电位器调节。
The pulse frequency can be selected by EPLD. The voltage amplitude and pulse width of analog pulse can be adjusted by analog switches and digitally controlled potentiometers.
介绍了一种利用模拟可编程器件和数字可编程器件设计三工位开关控制器的方案，并给出了具体的电路图和程序代码。
A scheme for designing the three-position switch with both analog and digital devices is presented with specific diagram and program code.
本电参数测试仪通过AT 89 C51单片机作为核心的控制元件，由模拟开关hcf 4051构成自动量程数字万用表。
Abstrct: the electrical parameters Tester through AT89C51 SCM as a core element of control by the analog switch HCF4051 constitute a range digital multimeter.
测试系统中采用了以数字信号处理器为核心，以复杂可编程逻辑器件为外围电路，来控制执行部件和测试与接收由外部返回的数字信号、模拟信号和开关信号。
Testing system, in which DSP is the part of core and CPLD is as peripheral circuit, controls operation parts, and test or incept the digital signal, analog signals and switch signals from exterior.
在数模混合布板时，数字电路的同步开关噪声往往会影响敏感的模拟电路。
On an analog and digital mixed print circuit board, the digital simultaneous-switching noise may bother the sensitive analog circuit.
在数模混合布板时，数字电路的同步开关噪声往往会影响敏感的模拟电路。
On an analog and digital mixed print circuit board, the digital simultaneous-switching noise may bother the sensitive analog circuit.
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