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A bus holder and electronic device

A retainer and bus technology, applied in the direction of instruments, electrical digital data processing, etc., can solve the problems that cannot be directly inserted

Active Publication Date: 2021-04-23
SEMICON MFG INT (SHANGHAI) CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This structure has bus hold only and cannot be plugged directly into an I / O design

Method used

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  • A bus holder and electronic device
  • A bus holder and electronic device
  • A bus holder and electronic device

Examples

Experimental program
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Effect test

Embodiment 1

[0031] One embodiment of the present invention provides a bus holder. The bus holders can be generated by combinational logic that can be plugged into the I / O circuit.

[0032] Below, refer to Figure 4 to Figure 8 A bus holder according to an embodiment of the present invention will be specifically described. in, Figure 4 It is a schematic diagram of a bus holder according to some embodiments of the present invention. The bus keeper in the embodiment of the present invention includes: a first pull-up circuit, the pull-up circuit includes a first switch and a second switch connected in series; a first pull-down circuit, the pull-down circuit includes a third switch connected in series switch and a fourth switch; and a fifth switch connected in series with the third switch and a sixth switch connected in series with the fourth switch, wherein the source of the fifth switch is connected to the source of the first switch The sources are connected, and the source of the sixth...

Embodiment 2

[0045] Another embodiment of the present invention provides an electronic device, the electronic device includes the bus holder described in the first embodiment.

[0046] The electronic device of this embodiment can be any electronic product or equipment such as mobile phone, tablet computer, notebook computer, netbook, game console, TV set, VCD, DVD, navigator, camera, video recorder, voice recorder, MP3, MP4, PSP, etc. , can also be any intermediate product including the semiconductor device.

[0047] The electronic device according to the embodiment of the present invention also has the above-mentioned advantages because it uses the above-mentioned bus holder.

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PUM

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Abstract

The present invention provides a bus keeper and an electronic device, the bus keeper includes: a first pull-up circuit, the pull-up circuit includes a first switch and a second switch connected in series; a first pull-down circuit, the The pull-down circuit includes a third switch and a fourth switch connected in series; and a fifth switch connected in series with the third switch and a sixth switch connected in series with the fourth switch, wherein the source of the fifth switch The second pole is connected to the source of the first switch, and the source of the sixth switch is connected to the source of the fourth switch. The bus keeper uses fewer MOSFETs to gain more functions, can perform bus keeper verification, utilizes pull-up and pull-down control pins to switch the bus keeper, and can be applied to I / O circuits and mass-produced .

Description

technical field [0001] The invention relates to the field of electronic circuits, in particular to a bus holder and an electronic device. Background technique [0002] A bus keeper is a positive feedback from an input port of an output signal through an inverter, which forms a bistable circuit (latched). A bus keeper is used to prevent a situation where a complementary metal-oxide-semiconductor CMOS gate input gets a floating value when it is connected to a tri-state network. Also, two transistors in the gate should be turned on, whereby power and ground will be shorted, which will destroy the CMOS gate. Bus keepers prevent this by pulling the input up to the last valid logic level (0 or 1) on the net. Such circuits are usually arranged in parallel with a three-state network. figure 1 A bus holder in the prior art is shown. Such as figure 1 , which shows a simplified schematic diagram, where Q1Q2 and Q3Q4 are two inverters. Point 1 is the input signal, points 4, 5 are ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F13/40
CPCG06F13/4022
Inventor 卢斌王俊刘毅马莹程惠娟
Owner SEMICON MFG INT (SHANGHAI) CORP