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Signal transmission method, transmission/reception circuit, and device having the transmission/reception circuit

A technology of signal transmission and signal transmission, which is applied in the field of transmission and/or receiving circuits and signal transmission methods, can solve the problems of unable to always extract reflected waves, subtract reflected waves, etc., and achieve the effect of reducing degradation and error rate

Inactive Publication Date: 2016-05-04
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a problem that it is impossible to always extract the most appropriate reflected wave component and subtract the reflected wave from the transmission or reception signal for dynamic changes in the transmission line such as temperature changes or deterioration over time.

Method used

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  • Signal transmission method, transmission/reception circuit, and device having the transmission/reception circuit
  • Signal transmission method, transmission/reception circuit, and device having the transmission/reception circuit
  • Signal transmission method, transmission/reception circuit, and device having the transmission/reception circuit

Examples

Experimental program
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Effect test

Embodiment 1

[0058] figure 1 is a block diagram showing the first embodiment of the present invention. figure 1 The transmission and / or reception circuit (transmission / reception circuit) 1 shown has an input and / or output terminal (input / output terminal) 2, a reflection correction circuit 3, an input and / or output circuit (input / output circuit) 4, Mixing circuit 5, and correlation value calculation and control circuit 6. When the transmission / reception circuit 1 is a transmission circuit, the input / output terminal 2 is an input terminal for inputting a transmission signal, the input / output circuit 4 is an input circuit, and the hybrid circuit 5 outputs the transmission signal to the transmission line 9 . In addition, when the transmission / reception circuit 1 is a reception circuit, the reception signal from the transmission line 9 is input to the hybrid circuit 5, the input / output circuit 4 is an output circuit, and the input / output terminal 2 is an output terminal for outputting the rece...

Embodiment 2

[0093] Figure 12 is a block diagram showing a second embodiment of the present invention. exist Figure 12 in, right with figure 1 The same parts are denoted by the same reference numerals and related explanations are omitted.

[0094] In this embodiment, the hybrid circuit 5-1 has figure 2 The structure shown is different from the first embodiment above in that figure 2 The shown resistor 511 is constituted by a variable resistor circuit capable of variably setting a resistance value. For the variable resistance circuit within the hybrid circuit 5-1, feedback is applied to minimize the correlation value based on the correlation value calculated by the correlation value calculation and control circuit 6-1, thereby further reducing the influence of reflection.

[0095] A variable resistor circuit can for example have Figure 13 or Figure 14 structure shown. Figure 13 The variable resistance circuit 511A has a plurality of resistors 5112 connected in parallel to con...

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PUM

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Abstract

In the signal transmission method that suppresses the reflected wave of the transmission signal in the transmission line, the correlation value between the data pattern of the transmission signal and the reflected wave is calculated to obtain the level and time information of the reflected wave; and based on the level and time information of the reflected wave to correct the waveform of the transmitted signal.

Description

technical field [0001] The present invention relates to a signal transmission method, a transmission and / or reception circuit (hereinafter simply referred to as a transmission / reception circuit), and a device having the transmission / reception circuit, and particularly relates to a plurality of circuit blocks used in a semiconductor device (semiconductor chip) A signal transmission method such as signal transmission between semiconductor chips (LSI chips), signal transmission between circuit boards on which semiconductor chips are mounted or between cases, a transmission / reception circuit, and a transmission / reception circuit having the transmission / reception circuit A device for receiving circuits. Background technique [0002] If the output impedance of the transmitting circuit or the input impedance of the receiving circuit does not match the characteristic impedance of the transmission line, signal reflection will occur due to the impedance mismatch. Due to this signal r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L5/14H04L5/02H04B3/06H04B3/23
CPCH04B3/23H04B3/238H04L25/0278H04L25/03343H04L25/03878
Inventor 木船雅也
Owner FUJITSU LTD