在自动化与各种仪表电路中,V/F变换器有着极其广泛的应用。目前高频型V/F器件非线性最好的可达±0.015‘如美国模拟器件公司的460型。这里向读者推荐一个单片同步V/F变换器AD651,如图1(a)所示,它的非线性度为0.005％。在图1(a)中,由积分器、比较器、与门、触发器、锁存器、单稳(one-shot)组成。图1(b)是引线排列图, In automation and various instrumentation circuits, V / F converter has a very wide range of applications. At present, the best non-linearity of high-frequency V / F devices is ± 0.015 ’, such as 460 of American Analog Devices. Here to the reader recommended a monolithic synchronous V / F converter AD651, as shown in Figure 1 (a), its non-linearity of 0.005%. In Figure 1 (a), by the integrator, comparator, AND gate, flip-flop, latch, one-shot (one-shot) composition. Figure 1 (b) is a lead arrangement diagram,