Receiver with dual D.C. noise cancellation circuits
First Claim
Patent Images
1. A receiver comprising:
- an input circuit configured to receive an input signal;
an error circuit configured to generate an error signal based on the input signal;
a first noise canceler configured to generate a first noise cancellation signal based on the error signal;
a second noise canceler configured to generate a second noise cancellation signal based on the error signal;
a first feedback loop comprising the first noise canceler, the first feedback loop configured to receive the error signal;
a second feedback loop comprising the second noise canceler, the second feedback loop configured to receive (i) the first noise cancellation signal and (ii) the error signal;
a first summer configured to receive the second noise cancellation signal; and
a second summer configured to receive the first noise cancellation signal,wherein the input circuit is responsive to the second noise cancellation signal.
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Abstract
A receiver comprises an input circuit that receives an input signal. An error circuit generates an error signal based on the input signal. A first noise canceler generates a first noise cancellation signal based on the error signal. A second noise canceler generates a second noise cancellation signal based on the error signal. The input circuit is responsive to the second noise cancellation signal.
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Citations
44 Claims
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1. A receiver comprising:
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an input circuit configured to receive an input signal; an error circuit configured to generate an error signal based on the input signal; a first noise canceler configured to generate a first noise cancellation signal based on the error signal; a second noise canceler configured to generate a second noise cancellation signal based on the error signal; a first feedback loop comprising the first noise canceler, the first feedback loop configured to receive the error signal; a second feedback loop comprising the second noise canceler, the second feedback loop configured to receive (i) the first noise cancellation signal and (ii) the error signal; a first summer configured to receive the second noise cancellation signal; and a second summer configured to receive the first noise cancellation signal, wherein the input circuit is responsive to the second noise cancellation signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A receiver comprising:
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a first circuit that generates a first signal based on an input signal and a first noise cancellation signal; an equalizer that generates an equalized signal based on the first signal; a second circuit that generates a second signal based on a second noise cancellation signal and the equalized signal; a decision circuit that generates an estimated original signal based on the second signal; a third circuit that generates an error signal based on the estimated original signal and the second signal; a first noise canceler that generates the first noise cancellation signal based on the error signal; and a second noise canceler that generates the second noise cancellation signal based on the error signal. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method comprising:
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receiving an input signal; generating an error signal based on the input signal; generating a first noise cancellation signal based on the error signal via a first noise canceler; generating a second noise cancellation signal based on the error signal via a second noise canceler; and generating an adjusted signal based on the input signal and the second noise cancellation signal, wherein generating the second noise cancellation signal comprises adding the error signal and the first noise cancellation signal to generate an addition signal. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. A method comprising:
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generating a first signal based on an input signal and a second noise cancellation signal; generating an equalized signal based on the first signal; generating a second signal based on a first noise cancellation signal and the equalized signal; generating an estimated original signal based on the second signal; generating an error signal based on the estimated original signal and the second signal; generating the first noise cancellation signal based on the error signal; and generating the second noise cancellation signal based on the error signal. - View Dependent Claims (37, 38, 39, 40, 41, 42, 43, 44)
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Specification