RS trigger structure for eliminating indeterminate state

Abstract

The invention provides an RS trigger structure for eliminating an indeterminate state, and belongs to the technical field of integrated circuits. The RS trigger structure comprises a first NOR gate and a second NOR gate, first input ends of the first NOR gate and the second NOR gate are connected with the first input end of the RS trigger structure, second input ends of the first NOR gate and thesecond NOR gate are connected with the second input end of the RS trigger structure, an output end of the first NOR gate is used as the first output end of the RS trigger structure, the output end ofthe second NOR gate is used as the second output end of the RS trigger structure, and the RS trigger structure can be applied to an RS trigger of a NAND gate structure. In some embodiments, the RS trigger structure further comprises a first inverter and a second inverter, the first inverter is connected between the first input end of the RS trigger structure and the first input end of the first NOR gate, and the second inverter is connected between the second input end of the RS trigger structure and the second input end of the second NOR gate, and can be applied to an RS trigger of a NOR gatestructure. The RS trigger structure provided by the invention reduces the production cost while improving the noise elimination effect.

Description

technical field [0001] The invention relates to the technical field of integrated circuits, in particular to an RS trigger structure for eliminating uncertain states. Background technique [0002] Today, RS flip-flops are widely used in various integrated circuits, and the IGBT drive circuit has advantages in a series of applications such as voltage-type drive, low drive power, high switching speed, saturation voltage drop, and high voltage and high current resistance. Advantages, showing good comprehensive performance, and thus widely used. However, in the IGBT drive circuit, because the clutter will be brought in after passing through the LDMOS tube, the waveform will become very poor, so it needs to enter the filter circuit for filtering and flattening. And because the pulse signal cannot drive the power MOSFET device, in the filter circuit of the IGBT drive circuit, the last rising edge pulse and falling edge pulse signal are restored to the square wave signal of the hi...

AI Technical Summary

Problems solved by technology

However, in the IGBT drive circuit, because the clutter will be brought in after passing through the LDMOS tube, the waveform will become very poor, so it needs to enter the filter circuit for filter flattening

And because the pulse signal cannot drive the power MOSFET device, in the filter circuit of the IGBT drive circuit, the last rising edge pulse and falling edge pulse signal are restored to the square wave signal of the high-end floating ground VS through the RS flip-flop, but During its working process, it will produce certain noise, which will affect the normal operation of electronic equipment.

[0003] At present, the RS flip-flop structure composed of NOR gates will appear in an uncertain state when both input terminals are invalid; the RS flip-flop structure composed of NAND gates will appear when both input terminals are valid. indeterminate state

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