Clock data recovery circuit, oscillation circuit and method for clock data recovery

A clock data recovery, circuit technology, applied in electrical components, analog/digital conversion, electrical pulse generation, etc., to ensure loop stability, high resolution, and good loop stability.

Pending Publication Date: 2021-12-24
M31 TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the oscillation circuit of a clock data recovery circuit may suffer from large jitter

Method used

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  • Clock data recovery circuit, oscillation circuit and method for clock data recovery
  • Clock data recovery circuit, oscillation circuit and method for clock data recovery
  • Clock data recovery circuit, oscillation circuit and method for clock data recovery

Examples

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Embodiment Construction

[0013] The following disclosure will disclose a variety of embodiments or exemplified, which can be used to implement different features of the present application. The specific example of the parameter value, component and configuration described below is used to simplify the content of this application. When it is conceivable, these descriptions are merely illustrative, and they are not intended to limit the contents of this application. For example, the contents of this application may repeat the component symbols and / or labels in the embodiment. Such repetition is based on the simple and clear purpose, and it does not represent the relationship between the different embodiments and / or configurations discussed.

[0014] In addition, when it is understood that if a component is described as a connection to "or" coupled to), then the two can be directly connected or coupled, or there may be other inter-two. Intervening component.

[0015] In order to ensure good loop stabilit...

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PUM

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Abstract

The invention discloses a clock data recovery circuit, an oscillation circuit and a method for clock data recovery. The clock data recovery circuit includes a sampling circuit, a phase detector, a first processing circuit, a second processing circuit and an oscillator circuit. The sampling circuit is configured to sample input data according to an output clock, and generate a sampling result. The phase detector is configured to generate a detection result according to the sampling result. The first processing circuit is configured to process the sampling result to generate a first digital code. The second processing circuit is configured to accumulate a portion of the first digital code to generate a second digital code. A rate of change of a code value of the second digital code is slower than a rate of change of a code value of the first digital code. The oscillator circuit is configured to generate the output clock according to the detection result, the first digital code and the second digital code. The clock data recovery circuit has the advantages of wide frequency adjustment range, high resolution rate, and good loop stability.

Description

Technical field [0001] The present application relates to clock data recovery, and more particularly to a clock data recovery circuit having a three-way structure for bandwidth tracking, and related oscillation circuits and methods for clock data recovery. Background technique [0002] With Clock Data Recovery (CLOCK AND DATA Recovery, CDR) technology, the receiver can restore data from a data stream without additional timing information. First, the receiver can perform clock recovery operations to extract clock signals embedded in level transitions of the data stream. Next, the receiver can convert the phase-align of the clock signal to the level of the data stream, and sampling the data stream according to the above-described clock signal by phase alignment, from The data is restored in the data stream. For example, the clock data recovery circuit has been widely used in a high-speed serial interface to regenerate data streams according to the high speed clock signal, wherein t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03L7/089H03L7/091H03L7/099
CPCH03L7/087H03L7/0991H03K3/0231H03L7/093H03L7/099H03L7/0995H03L2207/06H03L7/0807H03L7/189H03L7/091H03L7/0893H03L7/0992H03K3/037H03M1/38
Inventor 李国豪王怀德洪政亮
Owner M31 TECH
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