Electronic device for feeding ion pump

Details Electronic device for feeding ion pump Electronic device for feeding ion pump

1985-11-19

1987-12-15

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Using ionization effects

For monitoring pressure

31511191, 324 711, 417 49, G01L 2130, F04B 3714

Patent

active

047136197

ABSTRACT:
An electronic device for feeding an ion pump with two different tensions and for improved measuring of the pressure in the pump, the two different tensions being a normal operating tension and a lower tension at which a correct measurement of the pressure can be made in a pressure range up to beyond 10.sup.-10 torr. through a transformer whose primary or secondary winding is divided into two sections that can be connected and separated by switches controlled by oscillator circuits. Alternatively feeding at two different tensions can be obtained by feeding to the primary winding of the transformer a pulsed tension having a rectangular wave form and a high frequency controlled by a field effect transistor having an isolated gate. A sampling and holding circuit permits the pressure to be measured only in the conditions of feeding at the lower tension.

REFERENCES:
patent: 2504017 (1950-04-01), George et al.
patent: 2993638 (1961-07-01), Hall et al.
patent: 3429501 (1969-02-01), Hamilton et al.
patent: 4559591 (1985-12-01), Grunsch
patent: 4574223 (1986-03-01), Pitel

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