Filter circuit of integrated circuit and integrated circuit

Abstract

The invention provides a filter circuit of an integrated circuit. The filter circuit of the integrated circuit comprises a low-level delay unit, a first filter unit, a high-level delay unit, a second filter unit and an RS trigger, wherein the input end of the low-level delay unit receives an input signal, the low-level delay unit is used for delaying and outputting the falling edge of the received input signal, the first filter unit is connected with the low-level delay unit and used for filtering a negative pulse with a pulse width smaller than the delay time of the low-level delay unit, the input end of the high-level delay unit receives the input signal, the high-level delay unit is used for delaying and outputting the rising edge of received input signal, the second filter unit is connected with the high-level delay unit and used for filtering a positive pulse with a pulse width smaller than the delay time of the high-level delay unit, the R input end of the RS trigger is connected with the output end of the second filter unit, and the S input end of the RS trigger is connected with the output end of the first filter unit. The filter circuit of the integrated circuit can filter pulses with smaller pulse widths. The invention further provides the integrated circuit.

Description

technical field [0001] The invention relates to the field of integrated circuits, in particular to an integrated circuit filter circuit and an integrated circuit. Background technique [0002] A high-voltage integrated circuit is a gate drive circuit with functions such as various protection circuits, low-voltage control circuits, and high-voltage power devices. It combines power electronics with semiconductor technology, which significantly improves the integration and stability of the whole machine. With the advantages of high integration density, small size, fast speed, and low power consumption, it gradually replaces traditional discrete devices, and is increasingly used in MOS (Metal-Oxide-SemiconductorField-Effect Transistor, Metal-Oxide-Semiconductor- field effect transistor) tube, IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) driving field. One of the cores of high-voltage integrated circuits is the level shift circuit. The function of ...

AI Technical Summary

Problems solved by technology

[0009] The invention aims at the problem that the input signal of the integrated circuit will be disturbed by the outside, which will cause the MOS tube or IGBT driven by the integrated circuit to break through, and cause damage to the high-voltage integrated circuit and the application system, and proposes a new integrated circuit filter circuit. To solve the external interference on the input signal

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