Printing system having power regulating printhead cartridge interface

1. A printing system comprising:

a printhead cartridge comprising a printhead;

a cradle unit for supporting the printhead cartridge; and

an interface at which the cradle unit is removably engageable with the printhead cartridge, the interface comprising connections for connecting the printhead cartridge with a power supply which is remote from the interface and a power regulation circuit for regulating supply of power from the power supply to the printhead cartridge,

wherein the power regulation circuit incorporates a power storage circuit for storing at least some of the power being supplied to the printhead cartridge from the power supply, the power storage circuit including a plurality of capacitors for storing said power, the capacitors including electrolytic and ceramic capacitors.

2. A printing system according to claim 1 , wherein the electrolytic capacitors are 100 microFarad capacitors.

3. A printing system according to claim 1 , wherein the electrolytic capacitors are tantalum capacitors.

4. A printing system according to claim 1 , wherein eight of the electrolytic capacitors are arranged in parallel to store about 12 milliJoules of energy.

5. A printing system according to claim 1 , wherein the ceramic capacitors are 10 microFarad capacitors.

6. A printing system according to claim 1 , wherein six of the ceramic capacitors are arranged in parallel to store about 900 microJoules of energy.

7. A printing system according to claim 1 , wherein the power storage circuit further includes an inductor for storing some of said power.

8. A printing system according to claim 7 , wherein the inductor is a 10 microHenry inductor.