High output voltage transfer device

Abstract

This invention relates to a high output voltage transition device including an input level circuit, a current mirror circuit and a current switch, among which, the input level circuit has a first switch and a second switch, the current mirror circuit has a third switch and a fourth switch, said first switch, the current switch and said third switch form a current path, when the third switch is conducted, said current path will generate a DC current and the fourth switch of the current mirror circuit will generate a current mirror circuit so as to close the current switch via said mirror current, and DC current will not occur.

Description

technical field [0001] The invention relates to a high output voltage transfer device, especially a high output voltage transfer device suitable for high voltage conversion. Background technique [0002] High output voltage transfer devices are usually used to convert low-voltage control signals into high-voltage control signals. For example, when applied to liquid crystal displays, a high voltage of 20-40 volts is usually required to turn on the thin film transistor, but its input signal is generally It is 3 volts, or in some logic circuits, it usually only provides an operating voltage of 1 volt, but the operating voltage of the external circuit connected to it needs 5 volts. At this time, it needs to be shifted by a high output voltage transfer device. change. [0003] figure 1 A schematic diagram showing a conventional high output voltage transfer device mainly includes two P-type metal oxide semiconductor (MOS) 11 , 12 , two N-type MOS 13 , 14 and an inverting unit 15...

AI Technical Summary

Problems solved by technology

[0005] However, the high output voltage shifting device of this method makes the area occupied by the overall circuit smaller due to the space occupied by the high-voltage components, but it will cause a relatively serious DC power consumption situation, that is, the current mirror circuit. The resulting DC current in the active load path

[0006] figure 2 A schematic diagram showing the current high output voltage shifting device to solve the above circuit, which uses a double current mirror to generate a differential amplification signal to improve the existing high output voltage shifting device figure 1 There will be a shortcoming of DC leakage, but at least eight high-voltage process components are required to use this circuit as a high-output voltage transfer device, which still has room for improvement in practicability

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