08-05-2014 дата публикации
Номер: US20140129603A1
Various embodiments of the present invention provide systems and methods for equalization. As an example, a circuit for data equalization is described that includes a 2N state detector circuit that provides a series of detected bits based upon a conditioned input, and a noise predictive filter having a plurality of taps and operable to provide at least a portion of the conditioned input. At least a first of the plurality of taps uses a first subset of the series of detected bits, and a second of the plurality of taps uses a second subset of the series of detected bits. The first subset of the detected bits includes one more bit than the second subset of the detected bits. 1. A method for calibrating a partially conditioned equalization circuit , the method comprising:providing an equalizing circuit operable to equalize a data input to a three value (g2, g1, g0) target and to provide an equalized output;{'sub': −4', '−3', '−2', '−1', '0, 'providing a series of detected bits (a, a, a, a, a);'}{'sub': '1', 'claim-text': {'br': None, 'sub': 1', '−2', '2', '−1', '1', '0', '0, 'i': a', 'g', '+a', 'g', '+a', 'g, 'NC=−();'}, 'calculating a first noise component (NC) in accordance with the following equation{'sub': '2', 'claim-text': {'br': None, 'sub': 2', '−3', '2', '−2', '1', '−1', '0, 'i': a', 'g', '+a', 'g', '+a', 'g, 'NC=−();'}, 'calculating a second noise component (NC) in accordance with the following equation{'sub': '3', 'claim-text': {'br': None, 'sub': 3', '−4', '2', '−3', '1', '−2', '0, 'i': a', 'g', '+a', 'g', '+a', 'g, 'NC=−(); and'}, 'calculating a third noise component (NC) in accordance with the following equation{'sub': '4', 'claim-text': {'br': None, 'sub': 4', '−4', '1', '−3', '0, 'i': a', 'g', '+a', 'g, 'NC=−().'}, 'calculating a fourth noise component (NC) in accordance with the following equation2. The method of claim 1 , the method further comprising:{'sub': −2', '−1', '0, 'claim-text': {'br': None, 'sub': 1', '0', '2', '−1', '3', '−2, 'i': f', 'f', ' ...
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