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US 11,239,834 B2Granted
Clockless delay adaptation loop for random data
AssigneeTexas Instruments Incorporated
InventorAbishek Manian
Life of this patent
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Abstract
An apparatus includes a clockless delay adaptation loop configured to adapt to random data. The apparatus also includes a circuit coupled to the clockless delay adaptation loop. The clockless delay adaptation loop includes a cascaded delay line and an autocorrelation control circuit coupled to the cascaded delay line, wherein an output of the autocorrelation control circuit is used to generate a control signal for the cascaded delay line.
Claims11
An apparatus that comprises:
- a delay adaptation loop configured to adapt to random data;
- and
- a circuit coupled to the delay adaptation loop, wherein the delay adaptation loop comprises:
- a cascaded delay line;
- and
- an autocorrelation control circuit coupled to the cascaded delay line, wherein an output of the autocorrelation control circuit is used to generate a control signal for the cascaded delay line.
3 more elements
A decision-feedback equalizer (DFE), comprising:
- a summation circuit configured to provide an output signal by combining an input signal and a feedback signal;
- and
- a DFE feedback path configured to receive the output signal and provide the feedback signal, wherein the DFE feedback path includes a delay adaptation loop configured to adapt to random data, and wherein the delay adaption loop comprises:
- a voltage-controlled delay line (VCDL) with a data input node, a data output node, and a control input node;
- an autocorrelator coupled to the data input node and the data output node, wherein an output of the autocorrelator is used to generate a control signal input to the control input node;
- and
- a DFE tap circuit in series with the VCDL.
4 more elements
A delay adaptation loop, comprising:
- a first delay line;
- a second delay line;
- an autocorrelation control circuit coupled to the first delay line and the second delay line, wherein the autocorrelation control circuit provides a control signal to each of the first and second delay lines based on an autocorrelation function applied to input data and output data of at least one of the first and second delay lines.
Dependencies are inferred from the claim text.