Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Amplitude control
Reexamination Certificate
2005-07-19
2005-07-19
Lam, Tuan T. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Amplitude control
C327S321000, C361S091100
Reexamination Certificate
active
06919751
ABSTRACT:
A dynamic clamp200selectively clamps overshoot on a signal line100when overshoot is likely, while not clamping the received signal at times when overshoot is not likely encountered. A Driver Disable signal102disables the output of an output driver110so that it presents a high impedance to the signal line100. An activation element310asserts a Clamp Enable signal311, for example, in response to a transition of the received signal that occurs, for example, during a period in which a corresponding Driver Disable signal102is asserted. A deactivation element320asserts a Clamp Disable signal321, for example, a predetermined deactivation delay period after the Clamp Enable signal311is asserted. A clamping portion330selectively clamps the received signal100beginning with the assertion of the Clamp Enable signal and ending with the assertion of the Clamp Disable signal.
REFERENCES:
patent: 4382198 (1983-05-01), Ishijima et al.
patent: 4590394 (1986-05-01), Pace
patent: 5357156 (1994-10-01), Herrington
patent: 5708550 (1998-01-01), Avery
patent: 6097237 (2000-08-01), Singh
patent: 6396315 (2002-05-01), Morris
Brady III W. James
Lam Tuan T.
Moore J. Dennis
Nguyen Hiep
Telecky , Jr. Frederick J.
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