Rechargeable/portable multi-voltage dc power supply

Details Rechargeable/portable multi-voltage dc power supply Rechargeable/portable multi-voltage dc power supply

1992-12-08

1994-06-14

Voeltz, Emanuel T.

Electricity: power supply or regulation systems

Output level responsive

Using an impedance as the final control device

320 2, G05F 163

Patent

active

053213491

ABSTRACT:
A rechargeable/portable multi-voltage DC power supply includes an Ni-Cd rechargeable battery set connected to a switching power supply converting circuit, a pulse width modulation circuit, and a filter circuit for providing a regulated output voltage from the filter circuit. A button switch cooperates with a selection circuit and a feedback ratio circuit for selecting a specific output voltage from a plurality of available output voltages. A plurality of light emitting diodes are connected to the selection circuit for indicating the value of the output voltage.

REFERENCES:
patent: 4810948 (1989-03-01), Takuma
patent: 5084667 (1992-01-01), Drori et al.
patent: 5146154 (1992-09-01), Lippmann et al.

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