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:
Aug. 02, 2011
Filed:
May. 09, 2007
Henry G. Mcmillan, Raleigh, NC (US);
Pravin Patel, Cary, NC (US);
Challis L. Purrington, Raleigh, NC (US);
Gwendolyn R. Tobin, Jacksonville, FL (US);
Christopher C. West, Raleigh, NC (US);
Ivan R. Zapata, Cary, NC (US);
Henry G. McMillan, Raleigh, NC (US);
Pravin Patel, Cary, NC (US);
Challis L. Purrington, Raleigh, NC (US);
Gwendolyn R. Tobin, Jacksonville, FL (US);
Christopher C. West, Raleigh, NC (US);
Ivan R. Zapata, Cary, NC (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Embodiments of the invention address deficiencies of the art in respect to digital signal transmissions and provide a novel and non-obvious fall time accelerator circuit for use in a USB interface. In one embodiment of the invention, the USB interface can include a USB port driver coupled to a host controller driver over a USB bus. The USB interface also can include a fall time accelerator circuit coupled to the USB bus between the USB port driver and the host controller driver. The fall time accelerator circuit can include a pulse signal generator coupled to an inbound signal path from the USB bus and arranged to generate a tunable pulse upon detecting a falling edge of a digital signal on the inbound signal path. The circuit further can include an active timer additionally coupled to the inbound signal path to hold the tunable pulse for a set period of time. Finally, the circuit can include a falling drive signal strengthener coupled to an outbound signal path from the pulse signal generator arranged to release the tunable pulse on the outbound signal path onto the USB bus.