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Re: how to choose bjt
hi rampat, thank you for your replay. you mean i just need consider mismatch about bjt. but which bjt should i choose between 1.8V bjt and 3.3V bjt?
Re: Help: Generate multiple reference voltages from bandgap
Hi,
I think you can use the reference voltage generate a reference current, then use the current to make other voltages.
Hi,everyone
When I use HSPICE to simulate circuits under Cadence. I met two questions:
1.If the HSPICE can simulate the noise of circuits?If can,how to do?
2.How to simulate the stability of a bandgap reference?
I reslly appreciate your help!
I try another methode. First, let the negative input is the common voltage. Then, sweep the positive input. See the output voltage when the positive is at the common voltage. This output voltage is offset output voltage. Using the voltage divided by the amplifier's open gain is input offset...
Hello everyone,
I use cadence to simulate an amplifiers offset voltage, but it shows the offset is 170mV. I think it's too big. My method is as following: First, I connect the negative input and the output of the amplifier. Then, I add a DC signal at the positive input and sweep DC voltage. I...
Hi pfd001,
I have done as you said. But the gain is negative, the phase decrease from 0 degree. I don't know how much the phase margin is. I want to ask another question. You said I should put the ac input signal to the negative input of the amplifier. Can I put the ac signal at the positive input?
Hi gte582w,
You said my measure is right and I also need to add step signal at two inputs and supply. But someone said I should AC simulation which I am not good at. I am misunderstanding which method is right.
Can somebody explain?
bandgap stability
Hi, all
I don't know how to simulate whether the bandgap circuit is stable. I use such a way as the figure. I use a small step signal V. Then I run transient to see whether the output is stable. Does that method right? Why? Can someone tell me how to simulate whether the BGR...
buffer help
Hi all,
I need a buffer which can drive a low resistor below 1KΩ. Whether a buffer can realize such high load? And how to design? I will appreciate if someone can uplode some paper about this.
Thank you in advance!
Hi everybody,
I am designing a low supply voltage BGR. What should I care about? HOw many kinds of circuits can I use and what are they?
Thanks in advance!
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