混合式覆盖开关

THE MIXED COVERAGE SWITCH

从“全触点覆盖开关”(以前称“排列转换面板”)至“无触点覆盖开关”(由蔡安民同志设计)确实是一大革新,可以克服“全触点覆盖开关”转换插头接触不良及操作不便之弊病。然而,“无触点覆盖开关。所需结型场效应晶体管数量太多(对24道模拟磁带、备用24道,需场效应晶体管1200只),造价高昂,因此,许多人怀疑其是否具有实用价值。本设计的主要目的在于节省管子,降低造价,使之付诸实用。因本设计系以“无触点覆盖开关”为基础,增加了一些“触点开关,”故暂称为“混合式覆盖开关”。

From " Contact Mechanical Switch " to " Contactless Coverage Switch ", this is indeed a great advance in the vanquishment of the short-comings of bad contact and the inconvenience in operation. However, the "contactless coverage switch " needs a large number of "tied field-effect transistors" (for example, for the 24 channels analogy tape recorder,there is the requirement of 1200 transistors), hence, it takes a very high price of making such a switch. The main purpose of the design "is to save transistors and reduce production costs. The new design is with the "contactless coverage switch" as its, foundation, at the same time, it doesn’t cast aside the "contact mechanical switch" but combine them together to make a switch of new type. .For this reason, we call "it temporarily the "Mixed Coverage Switch".