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Level conversion circuit

A technology for converting circuits and levels, applied in logic circuits, logic circuit connection/interface layout, electrical components, etc., can solve problems such as inappropriate high-speed and low-power circuits, and achieve no static power consumption and high reliability. Effect

Active Publication Date: 2017-12-29
上海安其威微电子科技有限公司
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AI Technical Summary

Problems solved by technology

This solution is simple and low-cost, but it has two disadvantages of static power consumption and RC delay, which is not suitable for high-speed and low-power circuits

Method used

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Embodiment Construction

[0022] The invention overcomes the shortcomings of the existing solutions and provides a brand-new level conversion solution from a high-voltage domain to a low-voltage domain. A low withstand voltage device is used to shift the external input high-level voltage to a low-level voltage for use by the internal circuit, so that the internal circuit can work in the low-voltage domain. Using a low-voltage transistor with a relatively thin gate oxide can not only reduce the chip area but also work at a higher frequency without paying for additional mask layers.

[0023] Above-mentioned purpose of the present invention is achieved through the following technical solutions:

[0024] Such as figure 2 As shown, the level conversion circuit includes a step-down module, a feedback module, a reverse module and a sampling module;

[0025] The step-down module includes the input port IN of the level conversion circuit, and also includes the power port VDDL and the output port; the transis...

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Abstract

The present invention discloses a level conversion circuit. The level conversion circuit comprises a voltage reduction module, a feedback module, a reverse module and a sampling module. The voltage reduction module comprises the input port of the level conversion circuit and a power supply port and an output port. The feedback module comprises a power supply port and the input and output ports of the feedback module, wherein the input port of the feedback module is connected with the output port of the voltage reduction module. The feedback module is earthed through an earthing port. The reverse module comprises a power supply port and input and output ports of the reverse module, wherein the input port of the reverse module is connected with the output port of the feedback module. The reverse module is earthed through the earthing port. The output of the reverse module is the whole output port of the level conversion circuit. The sampling module is connected with the output port of the voltage reduction module and the output port of the reverse module through two ports, and is earthed through a port. The level conversion circuit uses low-voltage tubes, and all the CMOS devices allow high-voltage domain level to translate low-voltage domain level.

Description

technical field [0001] The invention relates to the technical field of integrated circuits, in particular to a level conversion circuit for converting a high voltage domain into a low voltage domain. Background technique [0002] At the interface circuit end of the IC chip, there are high-voltage input control signals such as 3.3V / 3.6V / 5.0V. In order to correctly identify these signals, the interface circuit needs to be able to withstand these high voltages without reliability problems. The device type provided by the chip process manufacturer has 1.2V / 2.5V / 3.3V / 5V and other withstand voltage devices to choose from, but according to different device selections, the process manufacturer will charge an additional mask layer fee in addition to the basic device. [0003] Generally speaking, for high-speed circuits and radio frequency circuits, in order to pursue high-speed, low-noise and other performances, the core circuits inside the chip choose short-channel low-voltage domai...

Claims

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Application Information

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IPC IPC(8): H03K19/0185
CPCH03K19/018507
Inventor 张侨马杰陆建华
Owner 上海安其威微电子科技有限公司
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