隧道二极管有一系列的优点,特别是操作速度很高,因而用它已构成几种逻辑元件。但是隧道二极管也有一些不足之处。本文拟介绍国外已经报导的几种隧道二极管-晶体管组合电路,它们能克服隧道二极管的某些缺点。例如,由于隧道二极管是一个二端元件,输出输入在同一端,不易隔离,采用隧道二极管与晶体管的组合电路可以获得较好的隔离。其次, Tunnel diode has a series of advantages, especially high operating speed, so use it has formed several logic components. But tunnel diodes also have some shortcomings. This article describes several tunneling diode-transistor combinational circuits that have been reported abroad that overcome some of the shortcomings of tunnel diodes. For example, because the tunnel diode is a two-terminal device, the input and output are at the same end, which is not easy to be isolated. The combination of the tunnel diode and the transistor can achieve better isolation. Second,