(19)
(11) EP 0 146 875 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
05.08.1987 Bulletin 1987/32

(43) Date of publication A2:
03.07.1985 Bulletin 1985/27

(21) Application number: 84115236

(22) Date of filing: 12.12.1984
(84) Designated Contracting States:
DE FR GB NL

(30) Priority: 22.12.1983 US 564538

(71) Applicant: GENERAL ELECTRIC COMPANY
 ()

(72) Inventors:
  • Santurtun, Carlos Manueco
     ()
  • Carmena, Angel Diaz
     ()

   


(54) X-ray generator with voltage feedback control


(57) A high-frequency transistor inverter operates from a fixed d.c. source to feed a high-voltage transformer whose output is filtered and rectified for application to an X-ray tube. The output voltage at the tube is sensed and a voltage feedback signal is compared with a voltage-demand signal to obtain a voltage-error signal which is applied to a control network for the inverter. The controller responds to the voltage error signal and to various protective and synchronizing signals to control the individual transistors of the inverter, in a pulse-width-modulated mode, to obtain a desired voltage output to the tube.






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