Programmable anti-interference synchronizer trigger

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...

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.

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