Beam current control circuit

Details Beam current control circuit Beam current control circuit

1980-08-15

1982-03-02

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

358243, H01J 2952

Patent

active

043180345

ABSTRACT:
A beam amount of a diode gun type pick-up tube is controlled in response to an incident light amount. Such beam control is carried out by making an excess beam amount constant. The calculation of the excess beam amount is done by subtracting a control electrode current and a signal current from a cathode current in case of the diode gun type pick-up tube.

REFERENCES:
patent: 3975657 (1981-06-01), Sato et al.

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