Rapid warm-up x-ray tube filament power supply

Details Rapid warm-up x-ray tube filament power supply Rapid warm-up x-ray tube filament power supply

1990-07-05

1991-12-31

Westin, Edward P.

X-ray or gamma ray systems or devices

Electronic circuit

X-ray source power supply

378110, 378101, 378111, H05G 132

Patent

active

050777726

ABSTRACT:
A power supply (C) for an x-ray tube filament (10) selectively functions either as a constant voltage source (12) or a constant current source (14). A control circuit (A) includes a voltage controller (56) for enabling the power supply to operate as the constant voltage source in a first time period t.sub.1 to t.sub.2 during which filament temperature (40) is increasing toward a preselected filament operating temperature (42). Once the filament temperature has substantially reached its operating temperature at a time t.sub.2, a timer (52) enables a current control (84) which causes the power supply to supply a constant current across the filament.

REFERENCES:
patent: 3414803 (1968-12-01), Glasgow et al.
patent: 4363971 (1982-12-01), Ochmann
patent: 4366575 (1982-12-01), Bax
patent: 4775992 (1988-10-01), Resnick et al.
patent: 4809311 (1989-02-01), Arai et al.
patent: 4930145 (1990-05-01), Sherwin et al.
patent: 4930146 (1990-05-01), Flakas et al.
patent: 4933625 (1990-06-01), Hayakawa

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