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运算放大器锁零电路分析及其改进

更新时间:2020-05-25 10:26:33 大小:194K 上传用户:xiaohei1810查看TA发布的资源 标签:运算放大器 下载积分:5分 评价赚积分 (如何评价?) 打赏 收藏 评论(0) 举报

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分别介绍了目前常用的由NPN型BJT和由N沟道JFET构成的运算放大器锁零电路的工作原理;针对N沟道JFET运算放大器锁零电路的弊端提出了相应的改进方法,即将控制回路中的二极管改为电阻以方便维修,将N沟道JFET改为P沟道JFET以简化计算机锁零控制电路;最后指出采用继电器进行运算放大器锁零可以消除残余电压。

Working principles of existing zero-locked circuits for operational amplifiers composed of NPN BJT or N channel JFET were introduced separately and corresponding improvement methods were proposed for shortcomings of zero-locked circuit with N channel JFET, namely the diode could be replaced by a resistor for convenient maintain and N channel JFET could be replaced by P channel JFET for simplifying control circuit of computer locking zero. Finally it was pointed out that remaining voltage can be eliminated by use of relay in zero-locked circuit of operational amplifiers.

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运算放大器锁零电路分析及其改进.pdf 194K

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