電離真空計の電子電流安定化回路ならびにフィラメント保護回路

概要

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A transistorized electron emission regulator and a transistorized filament protector for an ionization gauge have been studied. This electron emission regulator having a current path from filament of the ionization gauge to ground through base-emitter junction of a transistor, electron emission current of the gauge modulates the collector current of the transistor, and this modulated collector current regulates the heating current for the gauge filament. On the other hand, this filament protector is a type to detect voltage increase across the filament when vacuum pressure increases. These circuits are smallsized, of light weight and inexpensive, and moreover are seldom out of order because they are very simple.
日本真空協会の論文