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Differential current driving type transmission system

By using the current source block and transmission controller in a differential current drive system, combined with the current mirror and I-V converter, high sensitivity recovery of the signal and reduction of power consumption are achieved, solving the problem of signal distortion caused by noise and interference, and maintaining transmission speed and simplified receiver structure.

Active Publication Date: 2006-11-01
MAGNACHIP SEMICON LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is unavoidable that high-quality amplifiers complicate the overall circuit, which has the disadvantage of increasing the complexity of the overall circuit of the receiver and reducing the layout margin because the high-quality amplifier occupies a large area on the substrate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as figure 1 and 2 As shown in , the differential current-driven transmitter of the present invention includes: a first current source Icc1 for supplying a base current indicating a base logic state to a true line (trueline) Tx+ of a transmission line pair; a second current source Icc2, used to supply the base current indicating the logic state of the base to the bar line Tx- of the transmission line pair; the transmission current source Idc, used to generate the transmission current indicating the transmission logic state to the transmission line pair One of them; the equalizing switch SWE, which is used to equalize the potential of the transmission line pair before transmitting data; the transition switch SWT, which is used to supply the transition current to the real line Tx+ or the bar line Tx- according to the logic value of the data to be transmitted; and the transmission control A device 10 for controlling the switching operations of the transition switch SW...

Embodiment 2

[0046] The differential current-driven receiver includes: a real-line current mirror 42 for generating a real-line mirror current M×Irx+ by mirroring the data signal current Irx+ flowing through the real line TX+ of the transmitting pair; a bar-line current mirror 44 for passing The mirror image flows through the data signal current Irx- of the bar line TX- of the transmission line pair to generate a bar line mirror image current M×Irx-; the real line current voltage (I-V) converter 46 is used to generate a mirror image current M corresponding to the real line a real line reception voltage Cd+ of a level ×Irx+; a bar line I-V converter 48 for generating a bar line reception voltage Cd- having a level corresponding to the bar line mirror current M×Irx−; and a differential amplifier 50 for amplifying The level difference between the true line reception voltage Cd+ and the bar line reception voltage Cd-.

[0047] The real line current mirror 42 includes: a first input terminal MO...

Embodiment 3

[0060] The differential current-driven transmission system includes: a transmission line pair 30 for transmitting a signal through a differential scheme; a transmission unit 200 including a transmission circuit 20 and a transmission controller 10, and the transmission circuit 20 is used for making the transmission line pair 30 have a signal according to the transmission signal and equalize the transmission line pair 30 at a predetermined timing, the transmission controller 10 is used to control the signal transmission of the transmission circuit 20 and the equalization of the transmission line pair 30; and the receiving unit 400 has an I-V converter circuit 40 The I-V converter circuit 40 is used to mirror the current difference of the transmission line pair 30 and convert the current difference into a voltage difference, and the differential amplifier 50 is used to amplify the voltage difference of the I-V converter circuit 40 .

[0061] The transmission circuit 20 includes: a...

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PUM

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Abstract

There is provided a differential current driving current type transmission system. The system includes a transmission line pair for transmitting a signal by a differential scheme; a transmission unit having a transmission circuit for making the transmission line pair have a current difference according to a logic value of a transmission signal and equalizing the transmission line pair at a predetermined timing, and a transmission controller for controlling the signal transmission of the transmission circuit and the equalization of the transmission line pair; and a receiving unit having an I-V converter circuit for mirroring a current difference of the transmission line pair and converting the current difference into a voltage difference, and a differential amplifier for amplifying the voltage difference of the I-V converter circuit.

Description

technical field [0001] The present invention relates to data transfer systems; more particularly, to differential current-driven data transfer systems for transferring data through a differential current drive scheme. Background technique [0002] Traditional data transmission over transmission lines is accomplished by converting data into voltage differences and loading the voltage differences into the transmission lines on the transmitting side, and then converting the transmitted voltage differences into raw data on the receiving side, such as A transmission line of leads or the like exists between / in two or more semiconductor chips. [0003] In the case of data transmission using a voltage difference, there is a problem of lack of a relatively long transmission line, so a data transmission type using an electric current has been proposed. The data transfer type using electric current is a transfer type that converts a data signal into a magnitude difference of electric ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08C19/02
CPCH04L25/0272H04L25/0282H04L25/0294H04L25/03878B07B1/22B07B1/28B07B1/42B07B13/16
Owner MAGNACHIP SEMICON LTD