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:
Jul. 12, 2011
Filed:
Apr. 15, 2009
Applicants:
Christopher Wilson, Ft. Collins, CO (US);
Daniel Alan Berkram, Ft. Collins, CO (US);
Inventors:
Christopher Wilson, Ft. Collins, CO (US);
Daniel Alan Berkram, Ft. Collins, CO (US);
Assignee:
Helwett-Packard Development Company, L.P., Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K 3/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A serial interface apparatus comprises a driver for generating a differential communication signal and a pre-driver for driving the driver circuit. The pre-driver receives an input signal that alternates between VDD and ground and produces an output signal that alternates between a lower limit that is greater than ground and an upper limit that is less than VDD. The pre-driver comprises input circuitry and actuation circuitry, and the actuation circuitry comprises transistors of a single channel type.