Selectable-tap equalizer
First Claim
Patent Images
1. A device comprising:
- a transmit circuit to output a first data signal onto a first signal path during a first transmit interval;
a receive circuit to receive a second data signal from a second signal path during a first receive interval; and
an equalization circuit coupled to the first and second signal paths,the equalization circuit to output a first equalization signal onto the first signal path during the first transmit interval, the first equalization signal having a signal level according to a plurality of data signals to be transmitted on the first signal path, andthe equalization circuit to output a second equalization signal onto the second signal path during the first receive interval, the second equalization signal having a signal level according to a plurality of data signals received on the second signal path.
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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.
206 Citations
20 Claims
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1. A device comprising:
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a transmit circuit to output a first data signal onto a first signal path during a first transmit interval; a receive circuit to receive a second data signal from a second signal path during a first receive interval; and an equalization circuit coupled to the first and second signal paths, the equalization circuit to output a first equalization signal onto the first signal path during the first transmit interval, the first equalization signal having a signal level according to a plurality of data signals to be transmitted on the first signal path, and the equalization circuit to output a second equalization signal onto the second signal path during the first receive interval, the second equalization signal having a signal level according to a plurality of data signals received on the second signal path. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method comprising:
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transmitting a first data signal, by a transmit circuit, on a first signal path during a first transmit interval; transmitting a first equalization signal on the first signal path during the first transmit interval, the first equalization signal having a signal level according to data signals transmitted on the first signal path during a first time interval that precedes the first transmit interval; receiving a second data signal from a second signal path during a first receive interval; and transmitting a second equalization signal on the second signal path during the first receive interval, the second equalization signal having a signal level according to data signals received from the second signal path during a second time interval that precedes the first receive interval. - View Dependent Claims (11, 12, 13)
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14. An integrated circuit device comprising:
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a transmit circuit to output a first data signal onto a first signal path during a first transmit interval; a receive circuit to receive a second data signal from a second signal path during a first receive interval; a transmit equalization circuit to output a first equalization signal onto the first signal path during the first transmit interval, the first equalization signal having a signal level according to plurality of data signals to be transmitted on the first signal path, and a receive equalization circuit to output a second equalization signal onto the second signal path during the first receive interval, the second equalization signal having a signal level according to a plurality of data signals received on the second signal path. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification