Transceiver with single coefficient based equalizer taps
First Claim
1. A transceiver comprising:
- an equalizer configured to receive an input signal;
a control circuit configured to (i) select a predetermined coefficient, (ii) maintain the predetermined coefficient at a fixed value, and (iii) based on the predetermined coefficient, select a first plurality of coefficients and a second plurality of coefficients,wherein the control circuit is configured to select the predetermined coefficient, at least one of the first plurality of coefficients, and the second plurality of coefficients such that a sum of the predetermined coefficient, the at least one of the first plurality of coefficients, and the second plurality of coefficients is equal to a predetermined value,wherein the control circuit is configured to, while maintaining the predetermined coefficient at the fixed value and while the equalizer is receiving the input signal, adjust a coefficient of one of (i) the first plurality of coefficients, or (ii) the second plurality of coefficients, andwherein the equalizer comprisesa first plurality of taps configured to, based on the first plurality of coefficients, filter the input signal to generate a first filtered signal,a unity tap configured to, based on the predetermined coefficient, filter the first filtered signal to generate a second filtered signal, anda second plurality of taps configured to, based on the second plurality of coefficients, filter the second filtered signal to generate a third filtered signal; and
an output configured to transmit the third filtered signal.
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Accused Products
Abstract
A transceiver including an equalizer configured to receive an input signal. A control circuit selects a predetermined coefficient, maintains the predetermined coefficient at a fixed value, and based on the predetermined coefficient, selects first coefficients and second coefficients. The control circuit that, while maintaining the predetermined coefficient at the fixed value and while the equalizer is receiving the input signal, adjusts a coefficient of one of the first or second coefficients. The equalizer includes: first taps configured to, based on the first coefficients, filter the input signal to generate a first filtered signal; a unity tap configured to, based on the predetermined coefficient, filter the first filtered signal to generate a second filtered signal; and second taps configured to, based on the second coefficients, filter the second filtered signal to generate a third filtered signal. An output transmits the third filtered signal.
25 Citations
21 Claims
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1. A transceiver comprising:
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an equalizer configured to receive an input signal; a control circuit configured to (i) select a predetermined coefficient, (ii) maintain the predetermined coefficient at a fixed value, and (iii) based on the predetermined coefficient, select a first plurality of coefficients and a second plurality of coefficients, wherein the control circuit is configured to select the predetermined coefficient, at least one of the first plurality of coefficients, and the second plurality of coefficients such that a sum of the predetermined coefficient, the at least one of the first plurality of coefficients, and the second plurality of coefficients is equal to a predetermined value, wherein the control circuit is configured to, while maintaining the predetermined coefficient at the fixed value and while the equalizer is receiving the input signal, adjust a coefficient of one of (i) the first plurality of coefficients, or (ii) the second plurality of coefficients, and wherein the equalizer comprises a first plurality of taps configured to, based on the first plurality of coefficients, filter the input signal to generate a first filtered signal, a unity tap configured to, based on the predetermined coefficient, filter the first filtered signal to generate a second filtered signal, and a second plurality of taps configured to, based on the second plurality of coefficients, filter the second filtered signal to generate a third filtered signal; and an output configured to transmit the third filtered signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method comprising:
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receiving an input signal; selecting a predetermined coefficient; maintaining the predetermined coefficient at a fixed value; based on the predetermined coefficient, selecting a first plurality of coefficients and a second plurality of coefficients; selecting the predetermined coefficient, at least one of the first plurality of coefficients, and the second plurality of coefficients such that a sum of the predetermined coefficient, the at least one of the first plurality of coefficients, and the second plurality of coefficients is equal to a predetermined value; while maintaining the predetermined coefficient at the fixed value and while receiving the input signal, adjusting a coefficient of one of (i) the first plurality of coefficients, or (ii) the second plurality of coefficients; based on the first plurality of coefficients, filtering the input signal via a first plurality of taps to generate a first filtered signal; based on the predetermined coefficient, filtering the first filtered signal via a unity tap to generate a second filtered signal; based on the second plurality of coefficients, filtering the second filtered signal via a second plurality of taps to generate a third filtered signal; and transmitting the third filtered signal. - View Dependent Claims (18, 19, 20)
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21. A transceiver comprising:
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an equalizer configured to receive an input signal; a control circuit configured to (i) select a predetermined coefficient, (ii) maintain the predetermined coefficient at a fixed value, and (iii) based on the predetermined coefficient, select a first plurality of coefficients and a second plurality of coefficients, wherein the control circuit is configured to, based on the predetermined coefficient, limit to a predetermined range a sum of (i) the first plurality of coefficients and (ii) the second plurality of coefficients, wherein the control circuit is configured to, while maintaining the predetermined coefficient at the fixed value and while the equalizer is receiving the input signal, adjust a coefficient of one of (i) the first plurality of coefficients, or (ii) the second plurality of coefficients, and wherein the equalizer comprises a first plurality of taps configured to, based on the first plurality of coefficients, filter the input signal to generate a first filtered signal, a unity tap configured to, based on the predetermined coefficient, filter the first filtered signal to generate a second filtered signal, and a second plurality of taps configured to, based on the second plurality of coefficients, filter the second filtered signal to generate a third filtered signal; and an output configured to transmit the third filtered signal.
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Specification