DC Converter

Details DC Converter DC Converter

1979-08-06

1981-02-17

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific voltage responsive fault sensor

363 15, 363 50, H02H 320

Patent

active

042518474

ABSTRACT:
The input dc voltage is used to operate an astable multivibrator, the output of which is supplied to an emitter-follower that is coupled to an amplifier through a current-limiting resistor, so that a transistor across the input of the amplifier can controllably reduce the amplification of the amplifier. The amplifier output is supplied to the primary winding of a transformer which has a secondary winding that feeds a rectifier to supply the output dc voltage. The output dc voltage is coupled back to the control transistor through a Zener diode and a resistor in series, so that when the output voltage exceeds the Zener diode voltage, the control transistor will reduce the amplification of the amplifier, reducing the amplitude of the rectified ac voltage and hence regulating the output voltage.

REFERENCES:
patent: 3305756 (1967-02-01), Doss et al.
patent: 3670234 (1972-06-01), Joyce
patent: 3701937 (1972-10-01), Combs
patent: 3913036 (1975-10-01), Hook
patent: 3973220 (1976-08-01), Fender et al.
patent: 4005351 (1977-01-01), Blum
patent: 4084219 (1978-04-01), Furukawa et al.

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