Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Amplitude control
Patent
1995-04-21
1996-07-09
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Amplitude control
326 30, 326 62, 326 80, H03L 500
Patent
active
055348122
ABSTRACT:
The present invention includes an output circuit for a driver on a first chip that will cause an unterminated transmission line to create a predetermined voltage reflection. This reflection will then be added to the output of the driver circuit to obtain a voltage level capable of switching the receiver circuit, located on a second chip. Further, the impedance of the driver can be varied to adjust the voltage level of the signal being transmitted to the receiver, in order to reduce noise margins and cause the receiver to switch more quickly. Additionally, the transmission line impedance can also be modified to create overshoot, thereby allowing chips with dissimilar voltage levels to communicate with one another.
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Cao Tai A.
Dutta Satyajit
Nguyen Thai Q.
Trinh Thanh D.
Walls Lloyd A.
Callahan Timothy P.
International Business Machines - Corporation
McBurney Mark E.
Nu Ton My-Trang
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