Wide-range input/output interface circuit

An input and output interface, a wide range of technology, applied in the direction of logic circuit, logic circuit connection/interface layout, logic circuit coupling/interface using field effect transistors, etc., can solve the problem that the performance cannot meet the requirements, the operating voltage of the limited transistor device and reliability issues, etc.

Pending Publication Date: 2021-04-02
BEIJING MXTRONICS CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The traditional input and output interface circuits are designed for a specific power supply voltage. For the structure of the input and output interface power supply voltage higher than the core operating voltage, when the input and output interface power supply voltage is lower than the core operating voltage, due to the The operating voltage is much lower t

Method used

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  • Wide-range input/output interface circuit
  • Wide-range input/output interface circuit
  • Wide-range input/output interface circuit

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Embodiment Construction

[0030] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0031]The technical solution of the present invention is: a wide-range input-output interface circuit, including an output drive unit, three dual-mode level conversion units, an auxiliary voltage generation unit, two voltage-resistant input buffers, and two multiplexer device. Through the combination of the auxiliary voltage generation unit and the dual-mode level conversion unit, the ability of data output under various input and output interface power supply voltages is satisfied. When the input and output interface power supply voltage is higher than the core operating power supply voltage, the auxiliary voltage generation unit is turned on to generate An auxiliary voltage equal to the power supply voltage of the input and output in...

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Abstract

The invention discloses a wide-range input-output interface circuit, and belongs to the field of integrated circuits. Under the condition that the output driving unit (101) serves as an output interface, the gate-source voltage of a PMOS transistor in the output driving unit (101) is equal to the voltage of a kernel working power supply through the dual-mode level conversion unit by means of opening and closing of the auxiliary voltage generation unit (103). Under the condition that a voltage-withstanding input buffer unit (104) is used as an input interface, the gate-source voltage of the PMOS transistor in the voltage-withstanding input buffer unit (104) is enabled to be equal to the power supply voltage of the input/output interface by utilizing the opening and closing of the auxiliaryvoltage generation unit (103) and the opening and closing of the voltage-withstanding input buffer unit (104) and the voltage-withstanding input buffer unit.

Description

technical field [0001] The invention relates to a wide-range input-output interface circuit, in particular to an input-output interface circuit optimized for application requirements of programmable logic devices and capable of adapting to various power supply voltages, belonging to the field of integrated circuits. Background technique [0002] Programmable logic devices have the advantages of high flexibility, low cost, and short cycle time. They can greatly shorten the product development cycle and minimize risks. They have become core components in the integrated circuit industry. The programmable logic device includes two kinds of power supply, one is the core working power supply, for the overall circuit performance and power consumption, the core working power supply works under a fixed power supply voltage, and the other is the input and output interface power supply, which acts as a programmable logic device The communication function with other devices needs to be ...

Claims

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Application Information

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IPC IPC(8): H03K19/017H03K19/0185
CPCH03K19/017H03K19/0185
Inventor 陈雷倪劼李学武孙华波王文锋郭琨孙健爽刘亚泽赫彩甄淑琦张玉
Owner BEIJING MXTRONICS CORP
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