Patents Represented by Attorney Oliff & Beeridge, PLC

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  • Current switching architecture for head driver of solid ink jet print heads
    Patent number: 6837561
    Abstract: Circuit architecture for driving piezoelectric transducers with a Head Drive ASIC powered with only regular (constant) power supplies (instead of ramped and shaped power supplies) is disclosed. The circuit architecture consists of current mirroring systems and current switching techniques used to generate the required particular voltage waveforms across the capacitive transducers using only constant (DC) power supplies. There is no need for high voltage switching elements in this approach.
    Type: Grant
    Filed: October 30, 2002
    Date of Patent: January 4, 2005
    Assignee: Xerox Corporation
    Inventor: Mostafa R. Yazdy