A negative voltage level shift control circuit and method

A technology of conversion control and negative voltage generation circuit, which is applied in the direction of logic circuit, logic circuit connection/interface arrangement, logic circuit coupling/interface using field effect transistor, etc., which can solve the problem of circuit output voltage pulling up and affecting circuit performance, etc. problem, achieve the effect of reducing charge consumption, reducing the risk of voltage being pulled up, and speeding up switching speed

Active Publication Date: 2022-08-09
GUANGZHOU HUIZHI MICROELECTRONICS
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Problems solved by technology

However, in the switching process of this level shifting method, each path is turned on instantaneously, that is, there is a leakage path from positive voltage to negative voltage; In the process of passing through, the number of charges consumed is large, and there is a risk of pulling up the voltage of the output terminal of the negative voltage generating circuit, thereby affecting the performance of the subsequent circuit

Method used

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  • A negative voltage level shift control circuit and method
  • A negative voltage level shift control circuit and method
  • A negative voltage level shift control circuit and method

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[0031] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0032] During the operation of the integrated circuit, different voltages are generally required for different application scenarios. For example, in a high-speed chip interface circuit, different level domains cannot be directly interconnected, and a corresponding level conversion circuit is required for connection.

[0033] Figure 1a It is a schematic diagram of the structure of the negative voltage level conversion control circuit in the related art, such as Figure 1a As shown, the negative voltage level shift control circuit includes: a negative voltage generation circuit NVG and M level shift units LevelShift_1 to LevelShift_M, where M is an integer greater than or equal to 1. The ...

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Abstract

The present invention provides a negative voltage level conversion control circuit and method, the negative voltage level conversion control circuit includes: a negative voltage generating circuit, a bias circuit and a level shift unit circuit; wherein, the bias circuit has a The output end is connected with the level shift unit circuit, and the other end is connected with the negative pressure generating circuit; the output end of the negative pressure generating circuit is connected with the level shift unit circuit; the bias circuit is used for receiving an enable signal to output a bias voltage; the bias voltage is used to control the switching process of the level shift unit circuit; the enable signal is used to enable the bias circuit and the negative voltage generating circuit .

Description

technical field [0001] The present invention relates to integrated circuit technology, in particular to a negative voltage level shift control circuit and method. Background technique [0002] The negative voltage level conversion control circuit is a very common circuit module in the integrated circuit system. Its main function is to realize the conversion between different levels, including the conversion from positive voltage to positive voltage or positive voltage to negative voltage, such as from 1.8V to 3.3V or 2.5V to -2.5V conversion etc. [0003] In the related art, the negative voltage level conversion control circuit includes a negative voltage generation circuit and a level shift unit circuit, wherein the input terminal of the level shift unit circuit can be zero level or positive level, taking the input positive level as an example, The output is then switched to another positive and negative level. However, in this level conversion method, each channel is ins...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K19/017H03K19/0185
CPCH03K19/017H03K19/0185H03K19/0013H03K17/687
Inventor 刘炽锋张鑫
Owner GUANGZHOU HUIZHI MICROELECTRONICS
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