Communication driver

Details Communication driver Communication driver

2006-08-22

2006-08-22

Williams, Howard L. (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

C375S259000

Reexamination Certificate

active

07095348

ABSTRACT:
An Ethernet controller includes a decoder, and T sets of transmit circuits. Each set of transmit circuits receives one of T decoded signals from the decoder, and includes a digital-to-analog converter (DAC) that provides a transmit output signal, and a replica circuit that provides a replica output signal. Each DAC includes N current sources arranged in parallel and differentially, and M delay elements. Each current source includes a control input. A sum of outputs of the N current sources forms each transmit output signal. An input of the first delay element and the control input of the first current source receive a decoded signal. An input of an mth delay element is in communication with an output of an m−1th delay element. The output of each delay element controls a corresponding control input of a current source. A sum of the transmit output signals forms an accumulated output signal.

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