阅读说明：本技术 一种解决i2s传输中辐射超标的方法及系统 (Method and system for solving radiation standard exceeding in I2S transmission ) 是由 彭洪松 李莉 江露 陈彦霖 刘�文 袁和秀 于 2019-09-02 设计创作，主要内容包括：本发明公开了一种解决I2S传输中辐射超标的方法,在I2S传输的源端将时钟信号的电平幅度降低,在接收端再将时钟信号的电平幅度还原。还公开了一种解决I2S传输中辐射超标的系统,包括源端设备和接收端设备,源端设备连接第一电平转换电路,第一电平转换电路连接FFC排线的第一端,所述FFC排线的第二端连接第二电平转换电路,第二电平转换电路连接所述接收端设备。本发明在I2S源端增加电平转换模块,将I2S中时钟信号幅度降低,使该信号在传输过程中幅度低、能量小,不易造成辐射超标；在接收端,再使用该电路将低幅度信号还原。在电平转换中保证高速率、低延时,满足时序要求,保证信号不失真。(The invention discloses a method for solving the problem of overproof radiation in I2S transmission, which is characterized in that the level amplitude of a clock signal is reduced at a source end of I2S transmission, and then the level amplitude of the clock signal is restored at a receiving end. The system comprises a source end device and a receiving end device, wherein the source end device is connected with a first level conversion circuit, the first level conversion circuit is connected with a first end of an FFC (flexible flat cable), a second end of the FFC flat cable is connected with a second level conversion circuit, and the second level conversion circuit is connected with the receiving end device. According to the invention, a level conversion module is added at the source end of I2S, so that the amplitude of a clock signal in I2S is reduced, the amplitude of the signal is low and the energy is low in the transmission process, and the radiation standard exceeding is not easy to cause; at the receiving end, the circuit is used for restoring the low-amplitude signal. And high speed and low time delay are ensured in level conversion, the time sequence requirement is met, and the signal is ensured not to be distorted.)

1. A method for resolving radiation overproof in an I2S transmission, comprising: reducing the level amplitude of the clock signal in the I2S in the transmission process, specifically: the level amplitude of the clock signal is reduced at the source end of the I2S transmission, and the level amplitude of the clock signal is restored at the receiving end.

2. The method of claim 1, wherein the level amplitude is reduced at the source end of the I2S transmission by using a first level shifter, and the level amplitude is reduced at the receiving end by using a second level shifter.

3. The method of claim 2, wherein the first level shifter circuit and the second level shifter circuit are bidirectional level shifters.

4. a system for solving the problem that radiation exceeds standard in I2S transmission is characterized by comprising a source end device and a receiving end device, wherein a signal output end of the source end device is connected with a first level conversion circuit, the first level conversion circuit is connected with a first end of an FFC (flexible flat cable), a second end of the FFC flat cable is connected with a second level conversion circuit, the second level conversion circuit is connected with the receiving end device, the first level conversion circuit is used for reducing the level amplitude of an I2S clock signal, and the second level conversion circuit is used for restoring the level amplitude of an I2S clock signal.

5. The system of claim 4, wherein the first level shifter circuit and the second level shifter circuit are bidirectional level shifters.

6. the system of claim 4, wherein the first level shift circuit is configured to reduce the level amplitude of the I2S signal from 3.3V to 1.2V, and the second level shift circuit is configured to restore the level amplitude of the I2S signal from 1.2V to 3.3V.