Input and output circuit device
A technology of input and output circuits and input circuits, which is applied in the direction of logic circuit connection/interface layout, etc., and can solve the problem of MOS transistors being easily damaged
Active Publication Date: 2017-11-24
ALLWINNER TECH CO LTD
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] Based on this, it is necessary for the input and output port 5V _ The voltage of IO is 5V, the MOS transistor in the circuit is easy to be damaged, and an input and output circuit device is provided
Method used
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
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0046] In order to make the object, adopted technical solutions and advantages of the present invention clearer, the input-output circuit device of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0047] see figure 1 , an input-output circuit device according to an embodiment of the present invention includes an input circuit, a bias circuit and an output circuit.
[0048] The input circuit is electrically connected to the bias circuit for connecting the first input signal and the input signal;
[0049] The bias circuit is electrically connected to the input and output ports and the input circuit, and outputs a first input signal and a bias generation signal.
[0050] The output circuit is electrically connected with the input and output ports and the bias circuit, and is used for receiving the output signal and the bias generation signal.
[0051] The bias circuit includes a series resi...
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 PUM
Login to View More Abstract
The invention discloses an input-output circuit device. The input-output circuit device includes an output circuit, a bias circuit and an input circuit. The output circuit is connected to the input circuit through the bias circuit; the input circuit is used to connect the first input signal and the input signal; The output circuit is used to receive the output signal and the bias signal and is electrically connected to the input and output ports; the bias circuit includes a series resistor voltage divider module, a capacitor holding voltage module and a control module; the series resistor voltage divider module is used to The voltage regulates the working voltage of the first input signal terminal and the second input signal terminal; the control module is used to control the working voltage of the bias generating signal terminal according to the voltage signal of the second input signal terminal; the capacitor holding voltage module is used to maintain the working voltage of the bias generating signal terminal Voltage. It effectively avoids the phenomenon that the MOS transistor is damaged when the input and output ports are connected to a voltage signal with a swing of 5V when the local power supply is out of power.
Description
technical field [0001] The invention relates to integrated circuits, in particular to an input and output circuit capable of withstanding 5V voltage signals. Background technique [0002] With the rapid development of the electronic information industry, the speed of data transmission is increasing day by day, and various interface protocols between chips and between devices emerge in an endless stream. Many of these protocols require input and output circuits (or 5V voltage detection circuits) with a 5V signal operating range, and the active devices used in integrated circuits-metal-oxide-semiconductor field-effect transistors (metal-oxide-semiconductor filed effect transistors) , referred to as MOS transistor), the rated withstand voltage between any two ports is 3.3V, directly applied in the working environment of 5V signal, which will cause damage to the device. Therefore, how to use MOS transistors with a rated withstand voltage of 3.3V to design an input and output ci...
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 Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H03K19/0175
Inventor 倪陈志王洪魁丁然
Owner ALLWINNER TECH CO LTD