Voltage type four-value Schmidt trigger circuit based on neuron MOS (Metal Oxide Semiconductor) tube

Abstract

The invention discloses a voltage type four-value Schmidt trigger circuit based on a neuron MOS (Metal Oxide Semiconductor) tube. The voltage type four-value Schmidt trigger circuit comprises a threshold-0.5 reversed phase operation and threshold-0.5 operation circuit part 11 with return difference characteristic, a threshold-1.5 reversed phase operation and threshold-1.5 operation circuit part 12 with return difference characteristic, a threshold-2.5 reversed phase operation and threshold-2.5 operation circuit part 13 with return difference characteristic, and a four-value signal transmission control circuit part 14. The voltage type four-value Schmidt trigger circuit is completely based on a standard double-layer polycrystalline silicon CMOS (Complementary Metal-Oxide-Semiconductor Transistor) process, and three return difference voltage values in the four-value Schmidt trigger circuit can be adjusted by changing a capacitance coupling coefficient. A complementary neuron MOS tube scheme with an independent floating boom structure is adopted, so that the circuit has the characteristics of low power consumption and high noise margin. Moreover, threshold operation of a neuron MOS tube design and a reverse phase circuit thereof are adopted, so that threshold values are easy to control, thus the four-value Schmidt trigger circuit has a simple structure.

Description

technical field [0001] The invention relates to a Schmitt trigger circuit, in particular to a voltage-type four-value Schmitt trigger circuit based on a neuron MOS tube. Background technique [0002] The Schmitt trigger can effectively suppress the interference superimposed on the signal and eliminate the signal chatter, so it is widely used. It is a common circuit for shaping the signal and improving the on / off control in analog and digital systems. Two important features of the Schmidt circuit are: it can effectively receive slowly changing input signals and convert them into rapidly changing output signals; it has different detection thresholds for the DC transfer characteristics of positive and negative input signals, and the two The difference between them is called hysteresis. In multi-valued logic circuits, multi-valued Schmidt circuits should also have their corresponding status. The detection of the signal value by the circuit is made by comparing the input signal...

AI Technical Summary

Problems solved by technology

The multi-valued current CMOS Schmidt circuit usually consumes a large power consumption due to the existence of a DC path. Although the multi-valued voltage CMOS Schmidt circuit has the characteristics of low power consumption, the multi-valued voltage CMOS circuit has multiple A MOS tube with a threshold value needs to add an additional ion implantation process or use both enhancement and depletion MOS tubes, which increases the complexity of the process and limits the practicability

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