Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Synchronizing
Reexamination Certificate
2006-05-23
2006-05-23
Lam, Tuan T. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Synchronizing
C327S153000, C327S158000
Reexamination Certificate
active
07049868
ABSTRACT:
Various systems and methods providing signal delay compensation for circuits such as a multi-pair gigabit Ethernet transceiver are disclosed. In an analog implementation a buffer with an adjustable delay may be used to minimize the delay mismatch between clock trees. The delay of the adjustable-delay buffer is controlled by bias voltages that determine the charging and discharging current to the adjustable buffer. A phase detector circuit is used to compare the clock phases for rising and falling edges, and to adjust the bias voltages that control these edges. In a digital implementation a selector switch, responsive to a phase detector, may be used to route clock signals through circuit elements to delay clock signals.
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patent: 5828257 (1998-10-01), Masleid
patent: 6072347 (2000-06-01), Sim
patent: 6184733 (2001-02-01), Wang et al.
Broadcom Corporation
Lam Tuan T.
McAndrews Held & Malloy Ltd.
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