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Differential transmission device and automatic adjustment method for intercepting data thereof

A technology of data interception and transmission, which is applied in the field of data transmission and can solve problems such as data interception errors

Inactive Publication Date: 2012-11-21
NOVATEK MICROELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are often data interception errors caused by users (system designers) due to improper settings

Method used

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  • Differential transmission device and automatic adjustment method for intercepting data thereof
  • Differential transmission device and automatic adjustment method for intercepting data thereof
  • Differential transmission device and automatic adjustment method for intercepting data thereof

Examples

Experimental program
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Embodiment Construction

[0047] image 3It is a circuit block diagram illustrating a differential transmitter 300 according to an embodiment of the present invention. The differential transmitter 300 includes a phase detection unit 310 , a switching unit 320 , a rising edge intercepting unit 330 and a falling edge intercepting unit 340 . The phase detection unit 310 detects the phase relationship between the clock signal CLK and the data signal Din, and outputs a detection result M. The switch unit 320 is coupled to the phase detection unit 310 . According to the detection result M output by the phase detection unit 310, the switching unit 320 decides to switch the clock signal CLK and the data signal Din to the first output terminal group 321, or to switch the clock signal CLK and the data signal Din to the second output terminal group 322.

[0048] The rising edge interception unit 330 is coupled to the first output terminal group 321 of the switching unit 320 . The rising edge interception unit...

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Abstract

The invention relates to a differential transmission device and an automatic adjustment method for intercepting data thereof. The differential transmission device comprises a phase detection unit, a switch unit, a rising-edge intercepting unit and a dropping-edge intercepting unit. The phase detecting unit detects the relationship between clock signals and data signals and outputs detection results. The rising-edge intercepting unit intercepts data signals at the rising edge of clock signals and converts the data signals into first differential output signals according to intercepting results. The dropping-edge intercepting unit intercepts data signals at the dropping edge of clock signals and converts the data signals into second differential output signals according to intercepting results. The switch unit determines to switch the clock signals and the data signals to the rising-edge intercepting unit or switch the clock signals and the data signals to the dropping-edge interceptingunit according to the detection results.

Description

technical field [0001] The present invention relates to a data transmitter, and in particular to a differential transmitter and its automatic adjustment method for data interception. Background technique [0002] A differential transmitter converts the input data into a differential signal and transmits the differential signal to the next stage (receiver). Taking low voltage differential signal (LVDS for short) as an example, currently all LVDS transmitters have two methods for intercepting input data (data strobe), one is at the rising edge of the clock signal CLK Intercept the input data signal Din (such as Figure 1A shown), the other is to intercept the input data signal Din at the falling edge of the clock signal CLK (such as Figure 1B shown). [0003] The traditional LVDS transmitter has an input mode control terminal RFB, which can be used to determine the interception of the input data signal Din on the rising edge of the clock signal CLK ( Figure 1A ) or falling...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/02
CPCY02B60/33Y02D30/50
Inventor 李安旭
Owner NOVATEK MICROELECTRONICS CORP