Wave transmission lines and networks – Coupling networks – Balanced to unbalanced circuits
Reexamination Certificate
2006-01-31
2006-01-31
Pascal, Robert (Department: 2817)
Wave transmission lines and networks
Coupling networks
Balanced to unbalanced circuits
C333S246000, C333S254000
Reexamination Certificate
active
06992541
ABSTRACT:
An efficient solution to transform an output from a single ended source to a pair of differential signals that are provided to a differential receiver. The differential receiver is any number of devices including a differential clock receiver. The differential signals may be referenced to voltages used to receiver power supply voltages. The present invention obviates the need for an additional differential driver and its required additional devices that are needed to perform transformation of a single ended signal to a pair of differential signals. In one embodiment, two independent power and ground planes are communicatively coupled via a transmission line, or transmission line-like traces on a printed circuit board, and are used to provide uniform impedance control for all return paths within a system.
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Stoddard Joe D.
Wright Mitchel E.
Glenn Kimberly
Hewlett-Packard Development Company
Pascal Robert
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