Method and apparatus for calibrating a multi-level current mode driver having a plurality of source calibration signals
First Claim
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1. A multiple pulse amplitude modulated driver (multi-PAM driver), comprising:
- a data signal terminal; and
first and second driver circuits coupled with the data signal terminal to drive alternating data symbols communicated by the multi-PAM driver via the data signal terminal, wherein the first and second driver circuits include a first plurality of binary weighted driver transistors.
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Abstract
A current controller for a multi-level current mode driver. The current controller includes a multi-level voltage reference and at least one source calibration signal. A comparator is coupled by a coupling network to the multi-level voltage reference and the at least one source calibration signal. A selected voltage is applied from the multi-level voltage reference and a selected source calibration signal is applied from the at least one source calibration signal to the comparator.
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Citations
20 Claims
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1. A multiple pulse amplitude modulated driver (multi-PAM driver), comprising:
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a data signal terminal; and
first and second driver circuits coupled with the data signal terminal to drive alternating data symbols communicated by the multi-PAM driver via the data signal terminal, wherein the first and second driver circuits include a first plurality of binary weighted driver transistors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A multiple pulse amplitude modulated driver (multi-PAM driver), comprising:
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a first encoder to receive input data associated with even data symbols and to output encoded signals associated with the even data symbols;
a second encoder to receive input data associated with odd data symbols and to output encoded signals associated with the odd data symbols;
a data signal terminal;
a driver circuit coupled with the data signal terminal, the driver circuit including a plurality of binary weighted driver transistors; and
a switching circuit for selectively coupling odd and even data symbols that are to be driven by the drive circuit to the data signal terminal.
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Specification