Selectable-tap equalizer
AssigneeRambus Inc.
InventorsJared L. Zerbe, Vladimir M. Stojanovic, Fred F. Chen
Life of this patent
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Abstract
A signaling circuit having a selectable-tap equalizer. The signaling circuit includes a buffer, a select circuit and an equalizing circuit. The buffer is used to store a plurality of data values that correspond to data signals transmitted on a signaling path during a first time interval. The select circuit is coupled to the buffer to select a subset of data values from the plurality of data values according to a select value. The equalizing circuit is coupled to receive the subset of data values from the select circuit and is adapted to adjust, according to the subset of data values, a signal level that corresponds to a data signal transmitted on the signaling path during a second time interval.
Claims20
A device, comprising:
- an equalizing circuit having taps to perform one of adjusting a received signal or adjusting a signal threshold used in sampling the received signal;
- a storing circuit to store historical data values;
- and
- a select circuit to select, based on a latency signal, one of the historical data values from the storing circuit, the selected one to be used by the equalizing circuit to perform the one of adjusting the received signal or adjusting the signal threshold.
A device, comprising:
- means for performing one of adjusting a received signal or adjusting a signal threshold used in sampling the received signal using taps;
- means for storing historical data values;
- and
- means for selecting, based on a latency signal, one of the historical data values from the means for storing, the selected one to be used by the means for performing to perform the one of adjusting the received signal or adjusting the signal threshold.
A device, comprising:
- an integrated circuit having
- an equalizing circuit having taps to perform one of adjusting a received signal or adjusting a signal threshold used in sampling the received signal,
- a storing circuit to store historical data values, and
- a select circuit to select, based on a latency signal, one of the historical data values from the storing circuit, the selected one to be used by the equalizing circuit to perform the one of adjusting the received signal or adjusting the signal threshold;
- wherein the latency signal is to cause the equalizing circuit to select a subset of one or more of the historical data values within the storing circuit to be selected to source at least one of the taps of the equalizing circuit.
Dependencies are inferred from the claim text.