Buffer circuit

A buffer circuit and power supply circuit technology, applied in the direction of logic circuit connection/interface layout, logic circuit coupling/interface using field effect transistors, reliability improvement and modification, etc., can solve the operation speed limit, PMOS transistor signal rising slowly, semiconductor Increased device size, etc.
CN1855724AInactive Publication Date: 2006-11-01RENESAS ELECTRONICS CORP
1 Cites 4 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
RENESAS ELECTRONICS CORP
Publication Date
2006-11-01
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

A buffer circuit capable of switching between input mode and output mode includes a first transistor for outputting a prescribed voltage to an input / output terminal depending on a conductive state during the output mode of the buffer circuit, a pre-driver for controlling the conductive state of the first transistor during the output mode of the buffer circuit, and a power supply circuit for providing a first power supply to the pre-driver during the output mode of the buffer circuit and providing or blocking the first power supply to the pre-driver in accordance with an input voltage to the input / output terminal during the input mode of the buffer circuit.
Need to check novelty before this filing date? Find Prior Art

Description

field of invention

[0001] The present invention relates to a snubber circuit, and more particularly to a snubber circuit that does not allow current to flow into a terminal even when a voltage higher than a power supply voltage is input from the outside of the terminal. Background technique

[0002] Recent semiconductor devices have various functions and use various input / output signals. At the same time, semiconductor devices are required to have as few terminals as possible. Recently, the method adopted to meet this requirement is to use one terminal in input mode and output mode. However, in order to reduce power consumption, recent technologies operate semiconductor devices and semiconductor devices mounted in electronic equipment by using a plurality of power supply systems corresponding to their functions, such as a 3.3V power supply system and a 5.0V power supply system, thereby operating the entire electronic equipment. In this electronic device, when a signal is ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More