Error detection/correction and fault detection/recovery – Pulse or data error handling – Error/fault detection technique
Reexamination Certificate
2007-05-22
2007-05-22
Baker, Stephen M. (Department: 2133)
Error detection/correction and fault detection/recovery
Pulse or data error handling
Error/fault detection technique
C710S302000
Reexamination Certificate
active
10822027
ABSTRACT:
A method and apparatus are provided for detecting a receiver over a PCI-Express bus. A receiver is detected on a PCI-Express link by adjusting a common mode voltage using a current injected into one or more transmitter output nodes and detecting whether a receiver is present based on a voltage change rate. The current can be injected, for example, by a charge pump. In various embodiments, the charge pump can be integrated with a CML transmit buffer or an H-bridge type of transmit buffer. The amplitude control circuit can compare the adjusted common mode voltage to one or more predefined voltages and maintain the adjusted common mode voltage between two predefined voltages. The amplitude control circuit provides a signal to the charge pump to control the current injected into the transmitter output nodes. The amplitude control circuit also provides a signal to an exemplary timer that measures the voltage change rate.
REFERENCES:
patent: 5568610 (1996-10-01), Brown
patent: 5632019 (1997-05-01), Masiewicz
patent: 5680288 (1997-10-01), Carey et al.
patent: 5714809 (1998-02-01), Clemo
patent: 5758102 (1998-05-01), Carey et al.
patent: 5926651 (1999-07-01), Johnston et al.
patent: 6062480 (2000-05-01), Evoy
patent: 6170029 (2001-01-01), Kelley et al.
patent: 6502212 (2002-12-01), Coyle et al.
patent: 6535945 (2003-03-01), Tobin et al.
patent: 6690199 (2004-02-01), Ajit
patent: 6703848 (2004-03-01), Cho
patent: 2003/0059746 (2003-03-01), Georges
patent: 2004/0164721 (2004-08-01), Kwatra et al.
patent: 2004/0177301 (2004-09-01), Tarango et al.
patent: 2005/0182988 (2005-08-01), McBride et al.
patent: 2006/0230211 (2006-10-01), Woodral
patent: WO 98/28886 (1998-02-01), None
patent: WO 01/73465 (2001-04-01), None
Guo Chunbing
Yang Fuji
Agere Systems Inc.
Baker Stephen M.
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