Equalization circuitry including a digital-to-analog...

Details Equalization circuitry including a digital-to-analog... Equalization circuitry including a digital-to-analog...

2009-04-30

2011-11-22

Nguyen, Linh (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

C341S118000, C341S120000, C341S154000

Reexamination Certificate

active

08063807

ABSTRACT:
An equalization circuitry that includes a digital-to-analog converter having a voltage divider and a multiplexer coupled to the voltage divider is described. In one implementation, the digital-to-analog converter provides a control signal to a plurality of single-stage equalizer control logic circuits. Also, in one implementation, the multiplexer receives a plurality of inputs from the voltage divider and selects an output from the plurality of inputs. Furthermore, in one implementation, the voltage divider includes a plurality of resistors coupled in series. Also, in one implementation, the voltage divider further includes a first resistor coupled to the plurality of resistors, ground, and a lowest voltage input terminal of the multiplexer, where a voltage across the first resistor is an input voltage to the lowest voltage input terminal. Additionally, in one implementation, the voltage divider further includes a second resistor coupled to the plurality of resistors and a supply voltage, where the supply voltage minus a voltage across the second resistor and a voltage across a resistor of the plurality of resistors is an input voltage to a highest voltage input terminal of the multiplexer. In one implementation, the first and second resistors are programmable in user mode.

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