An anti-jamming circuit and method based on logic delay locking

Abstract

The invention relates to the field of data acquiring, in particular relates to a logic delay locking based anti-interference circuit and method, and aims at solving the problems in the prior art. The circuit and method are that a leading edge of a triggering signal is treated as a time reference point to lock an interference signal within a fixed delay range, so as to solve the interference problem related to a time sequence of the triggering signal. According to the circuit and method, a D triggering device is used for converting the triggering signal into a step signal which is synchronous with the leading edge; then a plurality of D triggering devices, a phase inverter and an NAND gate are used for converting the step signal into an inversion signal, wherein the leading time of the inversion signal is the same as that of the triggering signal, and the pulse width is determined by a clock cycle and the number of the D triggering devices; if the delay time of the interference relative to the triggering signal is less than the pulse width, the signal and the interference signal AND can be utilized to inhibit the interference signal within the pulse width.

Description

technical field [0001] The invention relates to the field of data acquisition, in particular to an anti-interference circuit and method based on logic delay locking. Background technique [0002] In some physical experiments, the trigger signal used to trigger the electronic equipment is often accompanied by the interference signal. For example, when the high-power pulse device and the electronic equipment are simultaneously triggered by multiple synchronous trigger signals, the interference signal generated by the action of the high-power pulse device will affect the normal operation of the electronic equipment. The characteristics of these interference signals are that they follow the trigger and have a short duration (for example, less than 1 μS). After the high-power pulse device operates, some physical quantities need to be measured or processed, and the signals representing these physical quantities generally arrive after a certain delay time (eg, greater than 1.5 μS)...

AI Technical Summary

Problems solved by technology

[0003] Commonly used suppression measures such as shielding and filtering will always bring additional hardware costs, and may affect the quality of the trigger signal, especially the timing jitter, so that the electronic device cannot be accurately triggered

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