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Ningbo Licheng Instrument Co., Ltd. is a research and development, production, sales and service in one of the laboratory equipment manufacturers. The company brings together many talents, such as ultrasonic, electronics, refrigeration, design and manufacture, and advanced production equipment, and concentrates on high-tech fields such as experimental instruments and Biomedical Engineering

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公司名称:宁波市立诚仪器有限公司

公司地址:宁波市鄞州区万成路277号

电话:0574-88208250,15957404423

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仪器的电压比较器详解

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仪器的电压比较器详解

Release date:2015-02-11 09:52 Source:http://www.lichengyiqi.com Click:

仪器的电压比较器详解
仪器的电压比较器的作用是用来将输入电压信号和参考电压相比较,以给出输入电压是否“越限”的输出信号。参考电压,加在同相输入端,输入电压加在反相输入端。由于开环电压放大倍数很高,输入电压与参考电压稍有差别,就会使输出电压达到正的或负的饱和电压。因此,运算放大器用作比较器时,它工作在饱和。可见,在比较器的输入端进行模拟信大小的比较,在输出端则以高电平或低电平给出比较的结果的信号。这种信号可作为“越限”报警信号或控制信号。
当参考电压UR=0时,称为过零比较器或零电平检测器。UR也可接在反相端,由同相端输入信号电压。为同相输入的过零比较器的输入输出波形图。

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