Hi Jason,Ok, you can send me email via peter.zhang@st.comFor the independent ROSCs which means to adjudge and test where the EMI comes from, does not mean let all amplifiers independently. you can verify the radiation one by one the device turn-off o...

Hi Jason,Yes, you can send me the layout for review.By the way, have you tried the suggestions I provided you? if yes, please let me know the difference between changes, I can then make more reasonable suggestions based on the clue you shared.-. as s...

Hello ,the EMI is quite related to PCB layout even the schematic is same but the traces and components placement different that would cause radiation indeed. before review layout, is it possible to try below suggestions:Please try to put a RC(100nF||...

Hi, you can check with local sales and distributor, then we can provide related documentations of STA309A, if ST sales or distributor defined the demands, we will provide your Gerber film of STA309A for the board making and assembly.Regards,Peter

Hello,There is no TDA7294 spice model, however you may try to use a gain with 30dB amplifier for example OP amp. + PMOS and NMOS to simulate the structure.China Analog Audio: Peter ZHANG