Patent ID: 7668239
Filing Date: 2010-02-23
Classification: H04L

Abstract:
1. A Transmit Timing Precompensation circuit for digital signals transmitted in a communications channel, comprising: a transmit timing precompensation (TTP) circuit, said TTP circuit configured for receiving a plurality of digital pulse signals in a pulse train, each of said digital pulses having an original width; a programmable delay operatively connected to said TTP circuit, said programmable delay configured for providing information to said TTP circuit to selectively widen said digital pulses; a pattern detector receiving said digital pulse signals prior to said pulses being received by said TTP circuit, said pattern detector operatively connected to said programmable delay and said TTP circuit, said pattern detector configured for inspecting several consecutive pulses in said digital signal pulse train and providing said TTP circuit with information to adjust the timing of said TTP circuit via said programmable delay; and a transmit driver receiving said digital signals from said TTP circuit and transmitting said digital signals over a communications channel; wherein said TTP circuit selectively widen only digital pulses having original widths narrower than a width determined by said pattern detector upon inspecting several consecutive pulses.