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Signal comparator circuit

A signal comparison and circuit technology, applied in multiple input and output pulse circuits and other directions, can solve problems such as voltage drop, current mode comparator transition misjudgment, etc., to achieve more accurate results

Inactive Publication Date: 2011-09-28
FARADAY TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention provides a signal comparison circuit, which is used to solve the problem of misjudgment of the transition of the current mode comparator and the voltage drop problem of the peak detector when comparing the AC data signal in the prior art

Method used

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  • Signal comparator circuit

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Embodiment Construction

[0037] image 3 is a schematic diagram of a signal comparison circuit 300 according to an embodiment of the present invention. The signal comparison circuit 300 is used to detect the quality of the non-return-to-zero data signal Vin. The signal comparison circuit 300 includes amplifiers 301 , 302 , a peak detector 303 , and a comparator 304 . Wherein, the amplifier 301 receives and amplifies the non-return-to-zero data signal Vin. The amplifier 302 receives and amplifies the reference voltage Vref. The peak detector 303 is coupled to the amplifiers 301 and 302 for detecting and maintaining the maximum value of the amplified data signal Vo1 and the amplified reference voltage Vo2, and then outputs the maintained data signal Vpeak1 and the maintained reference voltage Vpeak2. The comparator 304 is coupled to the peak detector 303 for comparing the maintained data signal Vpeak1 with the maintained reference voltage Vpeak2, and outputs the comparison result Vcomp as a signal qu...

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Abstract

A signal comparison circuit comprises a first amplifier, a second amplifier, a peak detector and a comparer, wherein the first amplifier is a zero-rising amplifier for receiving and amplifying a data signal; the second amplifier is used for receiving and amplifying a reference voltage; the peak detector is coupled with the first amplifier and the second amplifier for detecting and maintaining themaximal value of the amplified data signal and the reference voltage, and outputting the maintained data signal and the reference voltage; and the comparer is coupled with the peak detector for comparing the maintained data signal and the reference voltage and outputting the comparison result.

Description

technical field [0001] The invention relates to a signal comparison circuit, and in particular to a comparison circuit for non-return-to-zero (NRZ: not return to zero) data signals. Background technique [0002] At the receiving end of a high-speed serial (serial) system, a comparator (comparator) is often used to detect the amplitude of the input signal. The comparator compares the data signal with a preset threshold (threshold) or reference voltage, and the signal that is too small It will be considered as poor quality and skipped, and the signal filtered by the comparator will be accepted. [0003] For example, to detect the quality of the non-return-to-zero data signal. figure 1 A typical non-return-to-zero data signal 100 is shown. Signal 100 has two states of high and low. If the state does not change, it means that the transmitted data is 0, such as figure 1 As shown in the direct current (DC) part of , if the state is changed, it means that the transmitted data is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K5/24
Inventor 熊玟清赖佳良陈冠宇张正道
Owner FARADAY TECH CORP