Bi-directional universal serial bus booster circuit

Details Bi-directional universal serial bus booster circuit Bi-directional universal serial bus booster circuit

2008-07-01

2008-07-01

Le, Don P (Department: 2819)

Electronic digital logic circuitry

Signal sensitivity or transmission integrity

Input noise margin enhancement

C326S026000, C326S083000, C326S092000

Reexamination Certificate

active

12023659

ABSTRACT:
A bi-directional universal serial bus (“USB”) circuit for boosting a signal on a USB bus disclosed. The circuit includes a first stage inverting buffer coupled to a second stage inverting buffer to form a non-inverting buffer circuit. A high pass filter is coupled in series with the non-inverting buffer circuit to provide AC coupling to the USB bus and to allow fast signal edges through the circuit. The booster circuit is arranged to improve signal quality over a USB bus to allow additional USB devices and longer USB busses to be utilized.

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“Robust Design Techniques for USB Switches in Ultra-Portable and Consumer Applications”, G. Connolly, ESE Magazine, http://www.esemagazine.com/index.php?option=com—content&task=view&id=166&Itemid=2, accessed Jan. 27, 2008.

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