Switching convertor for generating a constant magnitude dc outpu

Details Switching convertor for generating a constant magnitude dc outpu Switching convertor for generating a constant magnitude dc outpu

1985-01-30

1986-12-16

Beha, Jr., William H.

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

323288, 323299, G05F 500

Patent

active

046299700

ABSTRACT:
An apparatus for generating a constant dc output voltage from a dc input voltage having a varying magnitude includes an inductor for storing an electrical charge and a semiconductor switch for controlling the application of the input voltage to the inductor. The apparatus further includes an error amplifier which compares the output voltage to a reference voltage and generates an error signal voltage proportional to the difference between the two voltages. An analog voltage divider generates a control voltage proportional to the ratio of the error signal voltage to the input voltage. The control voltage is applied to a pulse width converter which controls the duty cycle of the semiconductor switch responsive to changes in the input voltage such that the output voltage remains constant.

REFERENCES:
patent: 4459539 (1984-07-01), Cordy
patent: 4536700 (1985-08-01), Bello et al.
patent: 4546421 (1985-10-01), Bello et al.
Calvo et al., "Circuit to Linearize the Control Loop of a Switching Voltage Regulator", IBM Tech. Disc. Bul., vol. 22, No. 6, pp. 2191, 2192, Nov. 1979.
Frostholm, "One-Chip Controller Simplifies Switched-Mode Supplies", Electronics, vol. 52, No. 13, pp. 140-143, Jun. 21, 1979.

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