Adaptive AFE calibration techniques
AssigneeSamsung Electronics Co., Ltd.
InventorAnup P. Jose
Life of this patent
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Abstract
An adaptation engine included in a receiver of a serial data link, including at least one processor configured to: receive an error signal generated by an error slicer included in a decision feedback equalizer (DFE) and a data signal generated by a data slicer included in the DFE, perform a first iterative adaptation process corresponding to the AFE by adjusting a gain of the AFE based on the error signal and the data signal, and perform a second iterative adaptation process corresponding to the AFE by adjusting an degeneration resistance of a degeneration resistor included in the AFE based on the error signal and the data signal.
Claims21
A receiver for a serial data link, the receiver comprising:
- an analog front end (AFE) configured to receive a serial data stream and to generate an AFE output signal based on the serial data stream;
- a decision feedback equalizer (DFE) configured to receive the AFE output signal and to output deserialized data based on the AFE output signal, wherein the DFE comprises an error slicer configured to output an error signal based on a comparison between the AFE output signal and a reference voltage;
- and
- an adaptation engine configured to perform a first adaptation process associated with the AFE, wherein the first adaptation process includes adjusting the reference voltage based on the error signal, and adjusting a gain of the AFE based on a comparison between the adjusted reference voltage and a reference voltage target.
An adaptation engine included in a receiver of a serial data link, the adaptation engine comprising:
- at least one processor configured to:
- receive an error signal generated by an error slicer included in a decision feedback equalizer (DFE), wherein the error signal is generated by the error slicer based on a comparison between a reference voltage and an analog front end (AFE) output signal, and wherein the AFE output signal is generated by an AFE based on a serial data stream,
- receive a data signal generated by a data slicer included in the DFE, wherein the data signal is generated by the data slicer based on a comparison between a zero voltage and the AFE output signal,
- perform a first iterative adaptation process corresponding to the AFE by adjusting a gain of the AFE based on the error signal and the data signal, and
- perform a second iterative adaptation process corresponding to the AFE by adjusting a degeneration resistance of a degeneration resistor included in the AFE based on the error signal and the data signal.
A method of adapting an analog front end (AFE) included in a receiver of a serial data link, the method comprising:
- receiving an error signal generated by an error slicer included in a decision feedback equalizer (DFE) included in the receiver, wherein the error signal is generated by the error slicer based on a comparison between a reference voltage and an AFE output signal, and wherein the AFE output signal is generated by the AFE based on a serial data stream;
- receiving a data signal generated by a data slicer included in the DFE, wherein the data signal is generated by the data slicer based on a comparison between a zero voltage and the AFE output signal;
- performing a first iterative adaptation process corresponding to the AFE by adjusting a gain of the AFE based on the error signal and the data signal;
- and
- performing a second iterative adaptation process corresponding to the AFE by adjusting a degeneration resistance of a degeneration resistor included in the AFE based on the error signal and the data signal.
Dependencies are inferred from the claim text.