The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 11, 2019
Filed:
Nov. 30, 2017
Hewlett-packard Development Company, L.p., Houston, TX (US);
Andrew L. Van Brocklin, Corvallis, OR (US);
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P., Spring, TX (US);
Abstract
In some examples, a drive signal generator for a fluid ejection element of a piezoelectric printhead, includes a core amplifier to amplify an input waveform to provide an amplified waveform, and a plurality of rail power circuits, each coupled to a different power input of the core amplifier. Each rail power circuit of the plurality of rail power circuits includes a comparator to compare an instantaneous voltage of the amplified waveform to a subset of a plurality of voltage sources, and a switch to, based on the comparing by the comparator, couple to a respective power input of the core amplifier a voltage source in the subset of the plurality of voltage sources that is closest to the instantaneous voltage and sufficient to generate the amplified waveform.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile