Pulse filtering circuit device

Abstract

The invention provides a pulse filtering circuit device comprising two signal paths, namely a first path and a second path, wherein the first path comprises a first phase inverter unit; the second path comprises a second phase inverter unit, wherein each of the first phase inverter unit and the second phase inverter unit has four ports, which are respectively a first port, a second port, a third port and a fourth port, the first port is used as an input end, the second port is used as an output end, the third port is used as a fixed potential end of the first phase inverter unit or the secondphase inverter unit, and the fourth port is used as a floating potential end of the first phase inverter unit or the second phase inverter unit. The pulse filtering circuit device provided by the invention can eliminate common-mode noise signals, especially dV/dt common-mode noise generated by a power supply, therefore the circuit has very high anti-dv/dt ability and relatively small transmissiondelay, meanwhile due to the simple circuit structure, the chip area is reduced, and the production cost is reduced.

Description

technical field [0001] The invention relates to a circuit device of high-voltage drive technology, in particular to a novel pulse filter circuit device of a high-voltage floating gate drive circuit with high anti-noise capability, and belongs to the technical field of integrated circuits. Background technique [0002] The high voltage side gate drive circuit 101 in the prior art, such as figure 1 As shown, it is an integrated circuit device that controls the turn-on and turn-off of high-voltage power switching devices with low-voltage signals. Because it can effectively control bridge-connected power switching devices, it is widely used in fields such as motor drives and resonant power supplies. [0003] The high-side gate drive circuit 101 is often used to drive the high-side switching devices in the half-bridge structure, while the low-side switching devices in the half-bridge structure are driven by the low-side gate drive circuit 102, and its basic topology is as follows...

AI Technical Summary

Problems solved by technology

[0010] The present invention aims at the problem that the anti-dV / dt ability, anti-VS negative bias ability and channel transmission delay cannot be taken into account in the prior art of the high-voltage side gate drive circuit, and provides a new type of pulse filter circuit, which adopts the pulse filter The high-voltage side gate drive circuit of the circuit has high anti-dV / dt noise ability and anti-VS negative bias ability, and the channel has a small transmission delay; in addition, the circuit structure is small and compact, saving layout area

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