Emitter coupled asymmetrical logic protection triggering system

Abstract

The invention discloses an emitter coupled asymmetrical logic protection triggering system. The system is mainly composed of an emitter coupled asymmetrical circuit, a passive pi type filtering circuit, and a light beam excitation logic amplifying circuit connected between the emitter coupled asymmetrical circuit and the passive pi type filtering circuit in series. The system is characterized in that the light beam excitation logic amplifying circuit is mainly composed of a power amplifier P1, a NAND gate IC1, a NAND gate IC2, a NAND gate IC3, a polar capacitor C6, a resistor R9 and a polar capacitor C8 and the like, the negative electrode of the polar capacitor C6 is connected with the positive electrode input end of the power amplifier P1, the positive electrode of the polar capacitor C6 is grounded through a light emitting diode D1, one end of the resistor R9 is connected with the positive electrode of the polar capacitor C6, the other end of the resistor R9 is grounded through a diode D2, and the positive electrode of the polar capacitor C8 is connected with the point where the resistor R9 is connected with the diode D2. The system is simple in overall structure and quite convenient to manufacture and use. Meanwhile, the system is stable in performance, capable of effectively overcoming external electromagnetic interference and capable of effectively preventing current break.

Description

technical field [0001] The invention relates to a trigger circuit, in particular to an emitter coupling asymmetric logic protection trigger system. Background technique [0002] The trigger circuit is a circuit widely used by people at present, and it is widely used in fields such as electronics and electrical equipment. However, the trigger circuits currently used by people are not only complex in structure, but also susceptible to external electromagnetic interference, especially when the connected load changes due to temperature, these traditional trigger circuits will show nonlinear working conditions. A large sudden change in current will be generated, which is not conducive to the stable performance of the connected circuit system. Contents of the invention [0003] The purpose of the present invention is to overcome the defect that the current trigger circuit is prone to sudden change of current when the external load changes, which is not conducive to the stabilit...

AI Technical Summary

Problems solved by technology

However, the trigger circuits currently used by people are not only complex in structure, but also susceptible to external electromagnetic interference, especially when the connected load changes due to temperature, these traditional trigger circuits will show nonlinear working conditions. It will produce a large current mutation, which is not conducive to the performance stability of the connected circuit system

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