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Signal quality detection circuit and method

A signal quality and detection circuit technology, applied in the direction of measuring electricity, measuring electrical variables, measuring current/voltage, etc., can solve the problems of different, large numbers, and expensive oscilloscopes, and achieve the effect of low cost

Inactive Publication Date: 2018-08-17
MEDIATEK INC
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Problems solved by technology

However, the probes may not be in direct contact with the device under test, and are therefore indirectly connected to the device under test through an intervening medium / structure, so the actual signal quality of this electrical signal from the device under test is not the same as the actual signal quality of the device under test. Tested signal quality may vary
[0003] Oscilloscopes are quite expensive and not every manufacturer can afford them
Additionally, oscilloscopes require calibration, repairs, etc.
Therefore, considerable oscilloscope repair costs may be required
Also, a lot of manpower is required to perform signal quality measurements using an oscilloscope

Method used

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[0019] Certain terms are used throughout the specification and claims to refer to specific components. As can be understood by those skilled in the art, electronic device manufacturers may refer to the same component by different names. This article does not distinguish components by name, but by function. In the following description and claims, the word "comprising" is an open-ended restrictive word, so it should be interpreted as meaning "including but not limited to...". Additionally, the term "coupled" is intended to mean either an indirect electrical connection or a direct electrical connection. Thus, when one device couples to another device, that connection may be a direct electrical connection or an indirect electrical connection through other devices and connections.

[0020] figure 1 is a schematic diagram of the sampling operation performed on an input signal according to the nominal sample points. Such as figure 1 shown, through the sampling time T SP and sa...

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Abstract

A signal quality detection circuit has a sampling circuit and a comparing circuit. The sampling circuit samples an input signal associated with a target device according to a plurality of nominal sampling points, and generates a plurality of sampled bits corresponding to the nominal sampling points, respectively. The nominal sampling points are set by different combinations of sampling time and sampling reference voltage, and the number of the nominal sampling points is larger than four. The comparing circuit generates a signal quality detection result by performing comparison according to thesampled bits. The invention also provides a corresponding method. The circuit and the method can be used for realizing signal quality of electronic signal of measuring equipment with low cost.

Description

technical field [0001] The disclosed embodiments of the present invention relate to signal quality detection schemes, and more particularly, to a signal quality detection circuit and related signal quality detection method for generating signal quality detection results from a two-dimensional nominal sampling point pattern. Background technique [0002] An oscilloscope is an electronic test instrument that allows observation of changing signal power sources and typically displays a two-dimensional plot of one or more signals as a function of time. Therefore, the oscilloscope is generally used to observe changes in electrical signals (eg, voltage signals) that vary with time. The observed waveform can be analyzed in order to determine signal characteristics such as amplitude, frequency, distortion, and others. However, using an oscilloscope to measure the signal quality of electrical signals from a device under test requires a lot of preparation. In addition, the oscillosco...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/25
CPCG01R19/2503G01R19/2506G11C7/222G11C27/02G11C29/023G11C29/028H03K5/24G01R31/31708G11C7/22G11C8/18G11C29/00
Inventor 徐斌桓
Owner MEDIATEK INC
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