Phase discriminator and clock and data recovery circuit

A phase detector and circuit technology, applied in the direction of electrical components, automatic power control, etc., can solve the problem of high power consumption of CDR circuits, and achieve the effect of reducing power consumption and power consumption

Pending Publication Date: 2017-10-17
CHIPONE TECH BEIJINGCO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The embodiment of the present invention provides a phase detector and a clock and data recovery circuit to at least solve the technical problem of high power consumption caused by the CDR circuit of the traditional Bang-Bang phase detector in the existing process of acquiring edge sampling information

Method used

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  • Phase discriminator and clock and data recovery circuit
  • Phase discriminator and clock and data recovery circuit
  • Phase discriminator and clock and data recovery circuit

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Embodiment 1

[0036]According to an embodiment of the present invention, an embodiment of a phase detector is provided. It should be noted that the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and, although in The flowcharts show a logical order, but in some cases the steps shown or described may be performed in an order different from that shown or described herein.

[0037] image 3 is a schematic structural diagram of a phase detector according to an embodiment of the present invention, such as image 3 As shown, the phase detector includes:

[0038] The data sampling circuit 31 is used to sample the baud rate of the data stream to obtain a data sampling sequence; the integral comparison circuit 32 is used to perform integral comparison on the data stream to obtain a quantized digital signal; the logic circuit 33 is used to obtain a quantized digital signal based on The data sampling s...

Embodiment 2

[0056] According to another aspect of the embodiments of the present invention, a clock and data recovery circuit is also provided, Figure 6 is a schematic structural diagram of a clock and data recovery circuit according to an embodiment of the present invention, such as Figure 6 As shown, the clock and data recovery circuit includes:

[0057] The input end of the phase detector 61 is used to receive the data stream; the output end of the phase detector 61 is connected with the input end of the charge pump 62, and the output end of the charge pump 62 is connected with the input end of the loop filter 63, and the loop filter The output terminal of the device 63 is connected with the input terminal of the voltage-controlled oscillator 64, wherein, the phase detector 61 obtains the data sampling sequence by performing baud rate sampling on the data stream; signal; output the corresponding level signal according to the parallel data sampling sequence and the quantized digital ...

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PUM

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Abstract

The invention discloses a phase discriminator and a clock and data recovery circuit. The phase discriminator comprises a data sampling circuit for performing baud rate sampling on a data flow to obtain a data sampling sequence; an integral composition circuit for performing integral composition on the data flow to obtain a quantized digital signal; a logic circuit for outputting a corresponding level signal according to the data sampling sequence and the quantized digital signal.

Description

technical field [0001] The invention relates to the field of integrated circuits, in particular to a phase detector and a clock and data recovery circuit. Background technique [0002] In various data transmission interface circuits, the receiving end needs to retime the data sent by the sending end through a Clock and Data Recovery (CDR) circuit. In the CDR circuit, it is necessary to use a phase detector to judge the phase relationship between the recovered clock signal and the data symbols, so as to adjust the clock signal through a feedback loop to obtain an optimal sampling point. [0003] The Bang-Bang phase detector is a kind of phase detector commonly used in the CDR circuit at present. The circuit structure of the traditional Bang-Bang phase detector is as follows: figure 1 as shown, figure 1 It is a circuit structure diagram of a traditional Bang-Bang phase detector, which includes a data sampling circuit, an edge sampling circuit and a logic circuit. Its basic ...

Claims

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Application Information

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IPC IPC(8): H03L7/091H03L7/107
CPCH03L7/091H03L7/1072
Inventor 康裕航李志才巫朝发宋琳黄志正
Owner CHIPONE TECH BEIJINGCO LTD
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