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Information transmission system and method and its output signal driving device

A technology of signal transmission system and driving device, applied in the direction of line transmission components, logic circuit connection/interface layout, logic circuit coupling/interface using field effect transistors, etc., which can solve the problem of slow operation speed and poor current driving ability of PMOS transistors , large areas, etc.

Active Publication Date: 2010-12-08
AU OPTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in the conventional CMOS inverter 114, since the electron mobility μp of the PMOS is approximately equal to 1 / 3 times the electron mobility μn of the NMOS, the operation speed of the PMOS transistor is relatively slow, and the current driving capability is relatively poor.
To make the PMOS transistor generate a larger current to increase its current driving capability, it is necessary to increase the aspect ratio (W / L) of the transistor, so that the traditional signal output unit 110 occupies a larger area

Method used

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  • Information transmission system and method and its output signal driving device
  • Information transmission system and method and its output signal driving device
  • Information transmission system and method and its output signal driving device

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Embodiment 1

[0025] Please refer to image 3 , which is a structural diagram of a signal transmission system according to a first embodiment of the present invention. The signal transmission system 300 includes a signal output unit 310 and a signal receiving unit 320 . The signal output unit 310 receives the first signal P1, and outputs a second signal P2 in phase with the first signal P1 to the signal receiving unit 320, and the first high level (for example, 7V) of the first signal P1 is greater than that of the second signal P2. The second high level (for example, 3V). Then, the signal receiving unit 320 receives the second signal P2 and outputs a third signal P3. The first high level of the first signal P1 is the same as the third high level of the third signal P3.

[0026] The signal output unit 310 includes an inverting device 312 and an output signal driving device 314 . The inversion device 312 is used for receiving the first signal P1 and outputting a first inversion signal P1...

Embodiment 2

[0034] Please refer to Figure 4, which is a structural diagram of a signal transmission system according to a second embodiment of the present invention. The difference from Embodiment 1 is that in the output signal driving device 314, the gate of the NMOS transistor Q3 receives the control signal Pcon; while in the output signal driving device 414, the gate of the NMOS transistor Q3 receives the first signal P1, and other conditions are the same . In the first embodiment, the requirements of the control signal Pcon are as follows: 1. When the control signal Pcon is at a high level, it must be greater than the sum of the second high level and Vtn. 2. The control signal Pcon and the first signal P1 must be in phase. If the first high level of the first signal P1 is greater than the sum of the second high level and the Vtn value of the NMOS transistor Q3, the control signal Pcon can be replaced by the first signal P1.

[0035] It is known in the first embodiment that when th...

Embodiment 3

[0044] Please refer to Figure 5 , which is a structural diagram showing a signal transmission system of a third embodiment. The difference from the first embodiment is that a PMOS transistor Q5 is added in the output signal driving device 514 compared with the output signal driving device 314 . The source of the PMOS transistor Q5 is coupled to the drain of the NMOS transistor Q3, its gate is coupled to the gate of the NMOS transistor Q4, and its drain is coupled to the source of the NMOS transistor Q3. Other conditions are the same. In this embodiment, there is also the condition that the high level of the control signal>the second high level+Vtn.

[0045] Please refer to Figure 9 , which is a simulation result diagram of the traditional signal transmission system and the third embodiment. The signal OUT1 is the output signal of the inverting device 114 , the signal OUT2 is the output signal of the output signal driving device 514 , and the signal IN is the signal input ...

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Abstract

A signal transmission system includes a signal output unit and a receive unit, among which, the output unit receives a first signal and outputs a second, the receive unit receives a second signal and outputs a third. The signal output unit includes an inverter and an output signal drive device, the inverter receives a first signal and outputs a first inversion signal, the output-signal drive device receives a first inversion signal and outputs a second signal including a first and second NMOS transistors, the drain of the first NMOS is biased on the first voltage and its grid receives the control signal, the grid of the second receives the first inverted signal which source is biased on a second voltage, its drain is coupled with the source of the first and outputs the second signal.

Description

technical field [0001] The present invention relates to a signal transmission system, and in particular to a signal transmission system and method and an output signal driving device thereof. Background technique [0002] Generally, when a circuit transmits a signal through a long transmission line, considerable power consumption will be caused. Since the power consumed during signal transmission is proportional to the square of the voltage, a signal transmission system is usually used to step down the signal at the output end and transmit the signal at a lower voltage level during transmission to reduce power loss. , and then raise the signal to the original level at the receiving end. [0003] Please refer to figure 1 , which is an architecture diagram of a traditional signal transmission system. The signal transmission system 100 includes a conventional signal output unit 110 and a signal receiving unit 120 . After receiving the first signal S1 , the traditional signa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B3/18H03K19/0185
Inventor 吕世香
Owner AU OPTRONICS CORP