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US 5,686,872 AGranted
Termination circuit for computer parallel data port
AssigneeNational Semiconductor Corporation
InventorsRafael Fried, Erez Bar-Niv
Life of this patent
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AssigneeNational Semiconductor Corporation
InventorsRafael Fried, Erez Bar-Niv
Estimating the term…
Reflections and cross talk in a high-speed, bidirectional transmission line are minimized by terminating the transmission line with a network including a "serial" resistor connected in series between an end of the transmission line and a parallel (e.g. data) port, a "pull-up" resistor connected to the transmission line side of the serial resistor, and a capacitor connected between the parallel port side of the serial resistor and ground. Optionally, a diode is connected between the pull-up resistor and a bias potential. A variety of exemplary values for these components (i.e., serial resistor, pull-up resistor, capacitor) are discussed, in the context of particular signals. Preferably, the capacitor and the resistors are positioned as close as possible to the connector.
Termination circuit for a transmission line having an end connected to a parallel port, comprising:
Termination circuit for a transmission line having an end connected to a parallel port, comprising:
Method of terminating a transmission line having an end connected to a parallel port having a connector, comprising the steps of:
Termination circuit for a transmission line having an end and communicating signals with a parallel port, comprising:
Termination circuit for a transmission line having an end and communicating signals with a parallel port, comprising:
Method of terminating a transmission line having an end connected to a parallel port having a connector, comprising the steps of:
Dependencies are inferred from the claim text.