摘要
电桥是一种结构简单的检测电路,准确度和灵敏度都较高,广泛应用于检测仪器中。本文在分析电路原理及熟悉数字电位器、A/D转换芯片的基础上设计了电桥自动平衡和自动测量电路,按照这种设计整个平衡过程不需控制电路的参与,节省了CPU的调节时间。并讨论了电路设计中的关键问题。
Electrical bridge, a simple structure detecting circuit with high-accuracy and high-sensitivity, is widely used now in instruments. This paper presents a design of auto-balancing and measurement for bridge based on the knowledge of the bridge operating principle and direction of chips of digitally-controlled potentiometer and A/D convector. Under the design the CPU do not attend the balance and measurement process and a great dispose time is saved for CPU. In additional the key problems in circuit design are discussed.
出处
《电子质量》
2004年第2期6-7,共2页
Electronics Quality
