US 6,320,278 B1 · Power supply circuit

Abstract

A power supply device of the present invention includes an electric double layer capacitor connected to, e.g., an HDD (Hard Disk Drive), CD-ROM (Compact Disk Read Only Memory) drive, floppy disk drive or similar motor-driven equipment, and another electric double layer capacitor connected to, e.g., a pulse generating device included in a radio transmitter. The capacitors each feed power when the load of the associated equipment sharply varies during operation of the equipment. This makes it needless for a main power supply to feed such power. A laminate polymer battery is connected to a low voltage IC (Integrated Circuit) and feeds power thereto. This also makes it needless for the main power to feed power to the low voltage IC, and allows a short feed line to connect the laminate polymer battery and IC. The short feed line reduces the transfer of noise to the IC and therefore malfunction ascribable to noise.

Claims11

Dependent claims

A power supply circuit, comprising:

a main power supply;
a first auxiliary power supply which supplies power to a first circuit having first load requirements that result when a change in load of said first circuit occurs;
and
a second auxiliary power supply which supplies power to a second circuit having second load requirements, said second load requirements being less than said first load requirements,
wherein said first auxiliary power supply includes an electric double layer capacitor connected in parallel with said main power supply, said electric double layer capacitor dividing a current load of said first circuit between said electric double layer capacitor and said main power supply, and
wherein said second auxiliary power supply is connected to said main power supply and includes a battery having one of a positive pole and a negative pole formed of a conductive polymer.

3 more elements

Dependencies are inferred from the claim text.

Power supply circuit

Life of this patent

Power supply circuit

Life of this patent

Abstract

Claims11