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US 8,634,454 B2Granted
Receiver circuit, method of adjusting offset, and transmission/reception system
AssigneeFujitsu Limited
InventorsMasaya Kibune, Hirotaka Tamura
Life of this patent
Estimating the term…
Abstract
A receiver circuit includes: an equalization circuit that equalizes a first signal to obtain a second signal, and adjusts a characteristic of an equalization in accordance with an error between the second signal and a third signal; and a first offset adjustment circuit that adjusts an offset of the first signal in accordance with an error signal indicating the error.
Claims16
A receiver circuit, comprising:
- an equalization circuit that equalizes a first signal from an analog digital converter to obtain a second signal, and adjusts a characteristic of an equalization in accordance with an error between the second signal and a third signal;
- a first determination circuit that determines a level of the second signal and outputs a determination as the third signal;
- and
- a first offset adjustment circuit that adjusts an offset of a fourth signal which is input to the analog digital converter in accordance with an error signal indicating the error.
1 more element
A method of adjusting an offset, comprising:
- equalizing a first signal using an equalization circuit to output a second signal;
- determining a level of the second signal and outputs a determination signal as a third signal;
- obtaining a first error signal corresponding to an error between the second signal and the third signal;
- adjusting a characteristic of an equalization in accordance with the first error signal;
- equalizing a fourth signal using the equalization circuit having an adjusted characteristic of the equalization to output a fifth signal;
- determining a level of the fifth signal and outputting a determination signal as a sixth signal;
- outputting a second error signal corresponding to a difference between the fifth signal and the sixth signal;
- and
- adjusting an offset of the fifth signal in accordance with the second error signal.
6 more elements
The method of adjusting an offset according to claim further comprising:
- detecting an upper peak value and a lower peak value of the fifth signal;
- adjusting an offset of the first signal in accordance with the upper peak value and the lower peak value;
- and
- controlling a parameter for detecting the upper peak value and the lower peak value in accordance with at least one of the first error signal and the second error signal.
1 more element
A receiver system, comprising:
- a receiver circuit that is coupled to a transmission line transmitting a signal from a transmission circuit and that receives the signal from the transmission circuit, wherein the receiver circuit includes:
- an equalization circuit that equalizes a first signal from an analog digital converter to obtain a second signal, and adjusts a characteristic of an equalization in accordance with an error between the second signal and a third signal;
- a first determination circuit that determines a level of the second signal and outputs a determination signal as the third signal;
- and
- a first offset adjustment circuit that adjusts an offset of a fourth signal which is input to the analog digital converter in accordance with an error signal indicating the error.
2 more elements
Dependencies are inferred from the claim text.