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Jitter monitoring cirucit

A technology for monitoring circuits and circuits, applied in the direction of measuring electricity, measuring electrical variables, electrical components, etc., can solve the problems of lost transmission data, display monitor flicker, disadvantage, etc.

Inactive Publication Date: 2019-07-19
TAIWAN SEMICON MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Jitter often causes various problems with the corresponding circuit, device, or system, for example, causing a display monitor to flicker, adversely affecting the ability of a desktop computer or server's processor to perform an originally intended operation, causing a click or other undesired effects on audio signals, loss of transmitted data between network devices, etc.

Method used

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  • Jitter monitoring cirucit
  • Jitter monitoring cirucit
  • Jitter monitoring cirucit

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Embodiment Construction

[0014] The following disclosure describes various exemplary embodiments for implementing different features of the subject matter. Specific examples of components and arrangements are described below to simplify the present disclosure. Of course, these are only examples and are not intended to be limiting. For example, it will be understood that when an element is referred to as being "connected to" or "coupled to" another element, it can be directly connected to or coupled to the other element, or one or more elements may be present. Intervening elements.

[0015] The present disclosure provides various embodiments of a jitter monitoring circuit that can detect the presence of jitter in a clock signal based on a noise window (noise windown) and can further accurately determine the amplitude of the noise window. In some embodiments, the jitter monitoring circuit determines the presence of jitter by detecting whether the timing difference between the corresponding transitioning ...

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Abstract

A jitter monitoring circuit includes: a first delay circuit configured to receive a first clock signal; a second delay circuit configured to receive a second clock signal; a delay control circuit, coupled to the first and second delay circuits, and configured to cause the first and second delay circuits to respectively align the first and second clock signals within a noise window; and a loop control circuit, coupled to the first and second delay circuits, and configured to alternately form a first oscillation loop and a second oscillation loop passing through each of the first and second delay circuits so as to determine the noise window.

Description

Technical field [0001] The present disclosure relates to a jitter monitoring circuit. Background technique [0002] In electronic and / or telecommunications applications, jitter is the time deviation between the estimated periodic signal and the true period. Various causes of jitter are electromagnetic interference (EMI) and crosstalk with other periodic or non-periodic signals. This type of jitter is usually regarded as a noise effect in a circuit, device or system. Jitter usually causes various problems with corresponding circuits, devices, or systems, such as flickering display monitors, adversely affecting the ability of the processor of a desktop computer or server to perform the originally intended operation, and triggering a click. Or other undesirable effects of the audio signal, loss of transmission data between network devices, etc. Therefore, there is a need for a technology to accurately and quickly detect the existence of jitter in a circuit, device, or system, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F11/22
CPCG06F11/2215G01R31/31709G01R31/31725H03L7/099
Inventor 黄天建
Owner TAIWAN SEMICON MFG CO LTD