Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...
Patent
1987-12-22
1988-12-06
Wong, Peter S.
Electricity: power supply or regulation systems
Output level responsive
Using a three or more terminal semiconductive device as the...
323286, 323287, G05F 1565
Patent
active
047898186
ABSTRACT:
A DC voltage converter comprising: a switching transistor for establishing a load current circuit which connects a DC power source to a load to supply a load current to the load; a differentiating circuit connected in series to the load current circuit for producing a voltage drop corresponding to a differentiated value of the load current; an integrating capacitor connected in parallel with the load via an output terminal for outputting as an output voltage to be supplied to the load a voltage corresponding to an integrated value of a current flowing through the capacitor; a control width setting circuit for setting a width defined by upper and lower limits for controlling the output voltage in accordance with the voltage drop derived from the differentiating circuit; a ripple detection circuit receiving the output voltage from the capacitor and for detecting a ripple caused by an "ON-OFF" operation of the switching transistor; an output-reference-level setting circuit for setting a reference voltage of the output voltage; and a switching control circuit receiving a width signal corresponding to the width and a ripple signal corresponding to the ripple for forming a switching instruction to the switching transistor, so that a variation in the output voltage is limited within the width.
REFERENCES:
patent: 3585491 (1971-06-01), Petersen
patent: 4293812 (1981-10-01), Kubach et al.
patent: 4380729 (1983-04-01), Kaku et al.
patent: 4580089 (1986-04-01), Gruet al.
Fuji Electric & Co., Ltd.
Wong Peter S.
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