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.
Claims23
1-42. (canceled)
A circuit comprising:
- a first interface to a first signal path to exchange first digital values as a first signal;
- a second interface to a second signal path to exchange second digital values as a second signal;
- and
- equalizing circuitry having an adjustable parameter to adjust the first signal exchanged using the first interface;
- wherein the equalizing circuitry's adjustable parameter is adjusted, at least in part, based upon the second digital values.
A method of operating a circuit, the method comprising:
- with a first interface of the circuit, exchanging first digital values as a first signal via a first signal path;
- with a second interface of the circuit, exchanging second digital values as a second signal via a second signal path;
- and
- with equalizing circuitry having an adjustable parameter, adjusting the first signal exchanged using the first interface;
- wherein the equalizing circuitry's adjustable parameter is adjusted, at least in part, based on the second digital values.
Dependencies are inferred from the claim text.