Schmitt trigger circuit with input buffer circuit

Abstract

A Schmitt trigger circuit with an input buffer circuit is characterized in that the input buffer circuit is combined with a low-voltage Schmitt trigger circuit. A clamping voltage node is formed through the input buffer circuit, so that a high-voltage input signal possibly generated by an analog signal input end cannot damage the low-voltage Schmitt trigger circuit. Meanwhile, the working logic of the low-voltage Schmitt trigger circuit is kept correct.

Description

Technical field[0001]The present invention relates to a Schmitt trigger technology, particularly a Schmidt trigger circuit having an input buffer circuit, a combination of the input buffer circuit and a low pressure Schmitter trigger circuit, and forms a jaw through the input buffer circuit. The bit voltage node is caused to cause damage to the low-voltage Schmitt trigger circuit, while maintaining the low-voltage Schmitt trigger circuit while maintaining the logic of the low-voltage Schmitt trigger circuit.Background technique[0002]The traditional Schmitt trigger circuit belongs to the low-voltage Schmitt trigger circuit, which is a compatible CMOS and TTL logic levels, and the input signal is usually less than 5.5V. If you encounter a high voltage input signal, such as an input signal above 40V, the conventional Schmitt trigger circuit cannot withstand high pressure, which may cause the chip damage. Obviously conventional Schmitt triggers cannot be used for high pressure analog si...

AI Technical Summary

Problems solved by technology

If a high-voltage input signal is encountered, such as an input signal above 40V, the traditional Schmitt trigger circuit cannot withstand high voltage, which may cause chip damage

Obviously the traditional Schmitt trigger cannot be used for high voltage analog signal input

Images