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本文介绍一种用隧道二极管与晶体管相结合的逻辑线路。图1(a)是个普通的隧道二极管双稳线路;图1(b)是其工作图。当外触发时,工作点由①跳到②。所给出的逻辑增益G=(I_R)/(I_S)。为使G加大,须加大I_R并减少I_S。由于I_R有最大限度,故通常多使I_S减少。但另一方面由于二极管低压特性的微分电导很大,如I_S太小,则会由电源电压的变化或噪音等的影响而发生错误的翻博,因此G值不能取得太大。此外,纯隧道管的逻辑线路还不能获得象晶体管那样简单的负逻辑和保证讯号传送的方向性,因此也就需要采用晶体管线路。最常用和最简单的晶体管线路是共射线路。为
This article describes a logic circuit that combines a tunnel diode with a transistor. Figure 1 (a) is a common tunnel diode bistable line; Figure 1 (b) is its work. When the external trigger, the work point by ① jump to ②. The given logic gain G = (I_R) / (I_S). In order to make G bigger, we must increase I_R and reduce I_S. As I_R maximum, it is usually more to make I_S less. On the other hand, due to the large differential conductance of the diode low-voltage characteristics, if I_S is too small, erroneous inversion may occur due to changes in the power supply voltage or noise. Therefore, the G value can not be made too large. In addition, the logic of a pure tunneling tube can not obtain the simple negative logic like a transistor and ensure the directionality of signal transmission. Therefore, a transistor circuit is also required. The most common and simplest transistor lines are common-emitter lines. for