Electric lamp and discharge devices: systems – Periodic switch in the supply circuit – Periodic switch in the primary circuit of the supply...
Patent
1988-08-29
1990-09-04
Moore, David K.
Electric lamp and discharge devices: systems
Periodic switch in the supply circuit
Periodic switch in the primary circuit of the supply...
315241R, 315241S, 315DIG5, 315209R, H05B 3702
Patent
active
049547534
ABSTRACT:
The DC to DC converter includes a coupled inductor having a primary winding and a feedback winding. A drive current regulator circuit receives a variable input voltage from the feedback winding but transmits a constant base drive current to the base terminal of the converter switching transistor. The base drive regulator circuit thereby enables the DC to DC converter to operate at high levels of efficiency over wide ranges of DC input voltages such as twelve to forty-eight volts DC.
REFERENCES:
patent: 3331033 (1967-07-01), Johnston
patent: 3417306 (1968-12-01), Knak
patent: 3515974 (1970-06-01), Stich
patent: 3523235 (1970-08-01), Schaefer
patent: 4135233 (1979-01-01), Seiersen
patent: 4321507 (1982-03-01), Bosnak
patent: 4573112 (1986-02-01), Numata et al.
patent: 4595974 (1986-06-01), Lethellier
patent: 4613797 (1986-09-01), Essers et al.
patent: 4682081 (1987-07-01), Sikora
Moore David K.
Razavi Michael
Tomar Electronics, Inc.
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