扫描电压用处之广,众人皆知.而获得扫描电压的方法之多,也是众所熟悉的.然而要获得花钱少、制作线路简单、性能稳定、能满足实用要求的扫描电路,则是人们致力以求的.慢扫描电压在生产、科研中已越来越受到重视.周期为几十秒、几百秒的扫描电压发生器早已问世.然而周期为几千秒、甚至数小时的超慢扫描电压发生器产品尚不多见.我们在实验中经过反复试验,选出一种以集成电路为主要元件的较为满意的电路,并在低温电子隧道效应科研实验中付之应用,效果尚好.该电路主要由两只运算放大器及二极管,电阻、电容等构成,它可产生周期为数小时的锯齿波、三角 Scanning voltage is widely used, it is well known, and the method of obtaining the scanning voltage is also familiar, however, to obtain less expensive, simple circuit, stable performance, to meet the practical requirements of the scanning circuit, it is people Dedicated to slow scan voltage in the production, research has been more and more attention.The cycle of tens of seconds, hundreds of seconds of the scan voltage generator has long been available.However, the cycle of thousands of seconds, or even hours of ultra-slow Scanning voltage generator products are rare.We repeated experiments in the experiment, select a circuit to IC as the main components of the more satisfied with the circuit, and in low temperature electron tunneling research application, the effect is still good. The circuit is mainly composed of two op amps and diodes, resistors, capacitors, etc., which can produce a period of several hours of sawtooth wave, triangle