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基于AT89C51的信号发生器的设计 总被引:1,自引:1,他引:0
为了设计一款结构简单、性能优良的信号发生器,采用了AT89C51单片机为控制核心。在Proteus下仿真可以产生正弦波、方波、三角波、锯齿波,而且可以方便地设定输出信号的频率及幅度,得到的输出波形失真度低,频谱纯度高。 相似文献
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一种多功能信号发生器的设计与实现 总被引:1,自引:1,他引:0
针对目前常用信号发生器存在的功能模式固定、价格昂贵、操作不便的缺陷,提出了一种新型多功能的信号发生器,其输出信号的幅值、脉宽、频率、持续时间等均可调,并具有历史数据存储与回放的功能.详细介绍了其工作的基本原理并给出了具体的软硬件实现方法.与同类产品相比,该信号发生器具有功能齐全、操作简便、体积小巧等特点. 相似文献
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精密程控电流源的设计及应用 总被引:2,自引:0,他引:2
精密程控电流源采用USB通信模式,具有温度测量和输出电流非线性温度补偿功能,输出电流的准确度高、性能稳定可靠.文中介绍此电流源的电路设计、控制软件设计及其应用. 相似文献
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《信息技术与标准化》2008,(12)
“泄漏电流”这一术语已经用于表达若干不同的概念,如接触电流、保护导体电流、绝缘特性等。目前设备标准仍然普遍使用该术语表示人体接触电气设备时流过人体的电流,但实际所指的是接触电流。为符合行业的使用习惯,本规范沿用“泄漏电流”术语。 相似文献
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本文设计了一种基于运算放大器的新型的水位控制器,该水位控制器利用变压器的电磁变化和传导原理,实现了对电热蒸汽发生器水位的完全隔离的自动检测、报警、控制。实际使用证明:该控制器性能稳定,性价比高,使用方便,可以应用到各种电热蒸汽发生器上面,具有广泛的应用前景。 相似文献
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便携式甲醛检测仪采用的是STCI5W408S-SOP28-SKDIP28单片机,通过检测放大电路和放大倍数的调整经单片机A/D转换、由单片机现场自动控制检测并显示甲醛浓度,通过OLED12864液晶显示屏显示,灵敏度高,操作简便,测定速度快. 相似文献
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《Microelectronics Journal》2015,46(2):143-152
This paper introduces interesting active element and its application in the field of square and triangular wave generators. Active element, so-called Z-Copy Controlled Gain Voltage Differencing Current Conveyor (ZC-CG-VDCC), has availability of three mutually independently and electronically adjustable parameters (transconductance, intrinsic resistance of the current input terminal and current gain between two terminals) that are very popular for control of applications today. In addition, a proposed device utilizes very useful z-copy (additional auxiliary terminal) features and two terminals providing voltage difference. All mentioned features are beneficial in mixed-mode circuit synthesis and design of adjustable applications (active filters, oscillators, generators, modulators, etc.). Electronically adjustable properties of the device are involved in the design of an adjustable generator. The generator provides voltage- and current-mode square wave outputs that can be also used for differential square wave output when very simply modified. Application of the generator in simple pulse width modulator (PWM) is also introduced. A detailed analysis and Spice simulation results are given and main features of the circuits are compared to electronically controllable solutions of recent development in this field. 相似文献
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The theoretical background and a selection of simulated results are presented for a 10?µA PTAT current generator that is a modified CMOS version of an existing bipolar configuration. Using standard 0.35?µm CMOS technology, the circuit exhibits a current variation of less than 0.01% when the supply rail voltage is changed from 0.5 to 10?V. 相似文献