Power supply for a laser or gas discharge lamp

Patent · Tue Jun 29 04:00:00 EDT 1976

OSTI ID:7267219

Dendy, K H; Leskin, M D

A regulated power supply for a laser or gas discharge lamp employs a variable duty cycle oscillator to control the output voltage level. Output current to the laser or lamp load is maintained at a constant value by a feedback loop that controls the oscillator duty cycle. The output current is sensed by a novel circuit which employs a voltage regulator in series with the current return path. A change in output current causes a concomitant change in voltage across a resistor divider that shunts the voltage regulator. The voltage from this divider is a feedback signal that is supplied to a duty cycle modulator which controls the oscillator duty cycle. Another feedback signal is derived in delayed response to voltage output in excess of a certain high value. This feedback signal, which occurs, e.g., when the laser or lamp load does not ignite within a certain time period, also modifies the oscillator duty cycle so as to reduce the output voltage to a level that can be maintained continuously without damage or overheating of any circuit component.

• Assignee: Morton B. Leskin
• Patent Number(s): US 3967159
• OSTI ID: 7267219
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
DESIGN
ELECTRON TUBES
ELECTRONIC EQUIPMENT
FEEDBACK
GAS DISCHARGE TUBES
LASERS
OSCILLATORS
POWER SUPPLIES