Circuit for measuring the anode current in an X-ray tube

Details Circuit for measuring the anode current in an X-ray tube Circuit for measuring the anode current in an X-ray tube

1984-11-28

1987-06-16

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Electric lamp or discharge device

Vacuum tube

315307, 324412, 324403, 378110, G01R 3125

Patent

active

046738843

ABSTRACT:
A circuit for measuring anode current in an X-ray tube having an anode and a heater electrode both operable at high voltage, includes a heater transformer generating current pulses with a timewise constant first pulse repetition frequency and an adjustable duty cycle, a first frequency separator connected in series with the heater transformer for receiving the output thereof, a high voltage-proof transformer having a primary winding connected in series with the first frequency separator, and separate first and second secondary windings, the first secondary winding being connected to the heater for supplying heater current for the X-ray tube, an anode circuit connected to the anode of the X-ray tube including a current/duty cycle converter generating a current with a constant second pulse repetition frequency different from the first pulse repetition frequency, the first secondary winding being connected to the current/duty cycle converter for supplying voltage from the high voltage-proof transformer, a second frequency separator connected between the current/duty cycle converter and the second secondary winding of the high voltage-proof transformer for receiving an output signal of the current/duty cycle converter and preventing the first pulse repetition frequency from passing, a duty cycle/voltage converter, and a third frequency separator connected to the duty cycle/voltage converter together being shunted across the primary winding of the high voltage-proof transformer, the third frequency separator passing the second pulse repetition frequency and preventing the first pulse repetition frequency from passing.

REFERENCES:
patent: 2926302 (1960-02-01), Morelock
patent: 3969625 (1976-07-01), Tinkenzeller et al.
patent: 4295049 (1981-10-01), Ebersheger et al.
patent: 4311913 (1982-01-01), Reinick et al.

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