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I am trying to design a boost converter to drive an LED by using LM3478. The input voltage is not a certain value but a voltage range(6V~ 17V). The ouput voltage is about 40V. During power inductor selection ,the datasheet of LM3478 says the average inductor current should be larger than the...
It seems that nobody can answer my question, I am so sad. wu wu wu……
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It seems that nobody can answer my question, I am so sad. wu wu wu……
Net 'Vout" connects to the output end of a switching regulator(called LM3478). Net 'FB' connects to the FB pin of LM3478. as you known ,the FB pin will always be 1.26V in refer to the ground and the voltage between the cathode and the node is always 2.5V. Now i want to figure out the range of...
I want to know if i need to apply a 'kick -start'pulse in real desgin. Actually,I have made a PCB of it but it appears that the magnitude of the sine wave is very low ,which lies in uV class. And i don't know what to do..Can you give me some advice?
the following is the circuit of a bubba oscillator sketched by multisim , but I can/t get the expected output. The oscillator only shows a 6V DC .It seems that it cannot oscillate by itself, who can help me ?
I finished my PCB by the software of altium designer summer 09,now i want to save my PCb as "export protel PCB 2.8 ASCII" ,but it pop-up a window as follows ,what should i do ?plz help me.
In real-life, there is always a perturbation in the air,so it doesn't need to introduce one,but I don't know how it works when in simulating mode. The change of R13 doesn't matter.but I'll correct it then.
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Thanks for your material,and can you help me with my problem ?
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Thank you. I've rectified it. Here it is: But the result of oscillator becomes like this:.Apparently it is not a sine wave. And by the way,how should i do to take clipping into consideration?
I am try to generate a 50-60 Hz sine wave using the bubba oacillator. I have my in Multisim but i dont get the desired result.The signal was just limitless amplified and i don't know why. My schematic is:
and this is my result of oscillator at begning. but soon ,it becomes like this：
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