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US 11,606,230 B2Granted
Channel equalization
AssigneeApple Inc.
InventorsWilliam P. Cornelius, Seungyong Baek
Life of this patent
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Abstract
Circuits, methods, and apparatus that provide improved data recovery for data transmitted through a channel of limited bandwidth. An example can provide circuits, methods, and apparatus that can equalize losses in a physical channel. This equalization can provide an overall channel response that is more consistent and uniform.
Claims21
A method of setting a characteristic of a continuous-time front end in a receiver, the method comprising:
- with the receiver, receiving a first pseudo-random bit stream;
- detecting a first data pattern in the first pseudo-random bit stream;
- determining a first amplitude of the detected first data pattern;
- detecting a second data pattern in the first pseudo-random bit stream;
- determining a second amplitude of the detected second data pattern;
- determining a ratio of the second amplitude to the first amplitude;
- and
- using the ratio of the second amplitude to the first amplitude to set the characteristic of the continuous-time front end.
5 more elements
A method of setting a frequency response characteristic of a receiver, the method comprising:
- with the receiver having an input connected to a physical channel, receiving pseudo-random data;
- determining an initial amplitude of the received pseudo-random data;
- decreasing a de-emphasis of an equalizer in the receiver;
- detecting an increase in amplitude of the received pseudo-random data;
- and
- using the detected increase in amplitude to set the frequency response characteristic of the receiver.
3 more elements
A receiver comprising:
- a continuous-time front end to receive a pseudo-random bit stream;
- a pattern filter to detect a first data pattern in the pseudo-random bit stream;
- a peak detector to determine a first amplitude of the detected first data pattern;
- the pattern filter to detect a second data pattern in the pseudo-random bit stream;
- the peak detector to determine a second amplitude of the detected second data pattern;
- and
- control logic to determine a ratio of the second amplitude to the first amplitude and to use the ratio of the second amplitude to the first amplitude to set a characteristic of the continuous-time front end.
4 more elements
Dependencies are inferred from the claim text.