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Programmable anti-interference synchronizer trigger

A synchronous trigger and comparator technology, applied in instruments, signal transmission systems, electrical components, etc., can solve the problems of slow-changing low-frequency signals, cannot guarantee a single trigger, etc., to achieve the effect of ensuring synchronization accuracy

Active Publication Date: 2011-08-24
BEIJING DONGFANG MEASUREMENT & TEST INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The general sampling system needs a trigger system to realize the synchronization process. Due to the superimposed noise or interference of the signal, it is often impossible to guarantee a normal single trigger, especially for low-frequency signals that change slowly.

Method used

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Embodiment Construction

[0017] Below with the accompanying drawings ( figure 1 ) to illustrate the present invention.

[0018] Such as figure 1 As shown, a programmable anti-interference synchronous flip-flop is characterized in that it includes a reference point detection comparator CM1 in which the positive input terminals "+" are connected to each other and the negative input terminals "-" are connected to each other, and a positive input terminal "-" is connected to each other. The hysteresis comparator CM2 and a negative hysteresis comparator CM3, the positive input terminals "+" are all connected to each other to connect the input signal Vin; the output terminals of the reference point detection comparator CM1 are respectively connected to the working power supply Vdd and The counter is interconnected with the control logic circuit; the output terminal of the positive hysteresis comparator CM2 is respectively connected to one end of the first resistor network and the control logic circuit, and...

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Abstract

The invention discloses a programmable anti-interference synchronizer trigger, which provides a reliable triggering signal for an analogue to digital converter (ADC) sampling system, thereby ensuring the synchronization accuracy of the sampling system. The programmable anti-interference synchronizer trigger comprises a reference point detection comparator, a positive hysteresis comparator and a negative hysteresis comparator, wherein the positive input ends of the reference point detection comparator, the positive hysteresis comparator and the negative hysteresis comparator are connected withone another, and the negative input ends of the reference point detection comparator, the positive hysteresis comparator and the negative hysteresis comparator are connected with one another; nodes of which the positive input ends are connected with one another are connected with an input signal; the output end of the reference point detection comparator is connected with a working power supply by a resistor, and is connected with a control logic circuit by a counter respectively; the output end of the positive hysteresis comparator is connected with one end of a first resistive network and the control logic circuit; the other end of the first resistive network is connected with the positive input end of the positive hysteresis comparator; the first resistive network is grounded by a grounding end, and is connected with the control logic circuit by a port; and the output end of the negative hysteresis comparator is connected with one end of a second resistive network and the control logic circuit.

Description

technical field [0001] The invention relates to a sampling system trigger technology, in particular to a programmable anti-interference synchronous trigger. Background technique [0002] A general sampling system needs a trigger system to realize the synchronization process. Due to the noise or interference superimposed on the signal, it is often impossible to guarantee a normal single trigger, especially for low-frequency signals that change slowly. Moreover, for portable devices, the application environment is changeable, and a stable trigger mechanism is required to ensure the synchronization process of the sampling system. Therefore, the inventor believes that in the measurement system of low frequency and ultra-low frequency voltage, it is necessary to develop a programmable anti-interference synchronous trigger to provide a reliable trigger signal for the ADC sampling system, thereby ensuring accurate synchronization of the sampling system Spend. The ADC (ADC: analog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M1/54
Inventor 蒋方亮
Owner BEIJING DONGFANG MEASUREMENT & TEST INST
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