Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...
Patent
1997-05-29
1999-01-05
Riley, Shawn
Electricity: power supply or regulation systems
Output level responsive
Using a three or more terminal semiconductive device as the...
323266, G05F 140
Patent
active
058567410
ABSTRACT:
Power supply circuitry is disclosed which suppresses changes in a converted voltage regardless of changes in a load state without substantially increasing the volume and weight of the power supply circuitry and raising the manufacturing cost. The circuitry has a direct current power source. A first DC-to-DC converter converts a voltage of the direct current power source. A smoothing filter smoothes the converted voltage of the first DC-to-DC converter and outputs it. The power supply circuitry further includes a power supply section. The power supply section has a voltage detecting portion for detecting a decrease in the converted voltage and outputs a voltage-decrease detection signal. A power holding portion charges capacitor devices with the converted voltage or a voltage of the direct current power source, and discharges the capacitor devices when a voltage-decrease detection signal is output. A second DC-to-DC converter converts an output of the power holding portion and synthesizes the converted output with the converted voltage of the first DC-to-DC converter. A predetermined voltage at which the voltage-decrease detection signal starts to be generated is set lower than the internal control voltage of the first DC-to-DC converter.
REFERENCES:
patent: 3414802 (1968-12-01), Harrigan et al.
patent: 4868908 (1989-09-01), Pless et al.
patent: 5532576 (1996-07-01), MacRobbie et al.
patent: 5710699 (1998-01-01), King et al.
Alps Electric Co. ,Ltd.
Riley Shawn
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