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Hi erikl,
Thanks for your help! I studied the tutorial in your attachment and I also did some research on our foundry website. Finally I got the monte carlo simulation work.
The way Cadence Spectre does monte carlo analysis is different from PSPICE. In PSPICE one needs to figure out the...
Hi everyone,
Previously I used PSPICE for my analog/mixed-signal simulations. Recently I tried to convert my design to Cadence Virtuoso-Spectre. I have been self-studying it for a few days. It is quite different from PSPICE and it looks like powerful and complicated. Due to lack of training...
Hi,
Recently I am learning boost converters. Here I have a "dumb" question, can anyone help me?
From textbooks, it is known that if other loss is ignored, the Vout = Vin /(1-D), where D is the duty cycle of the switching signal.
Usually there is a feedback network that senses...
"Supply select" selects the supply for the band gap and DC/DC.
In AC only, the "supply select" selects the regulated 3.3V as the supply for the band gap and DC/DC (although in this case DC/DC is not needed).
In battery only, "supply select" selects the battery voltage as the supply for the...
You missed the point.
Here the regulator is inside the IC I am designing. It is all internal. To design a regulator, a reference (such as band gap) is needed.
I see what you mean. But in either case, the regulator needs the band bap voltage as a reference. In AC only condition, what is the supply of band gap circuit?
tpetar,
Sorry I did not mention. The purpose is to make the IC work in both AC only and 3V battery only condition. The requirement is to let IC generate regulated 3.3V for microcontroller. 10V (not regulated) is also needed for other use.
So the challenge here is to make it work in...
Sorry I did not clearly tell what I need. See attached diagram. The IC under design is within the blue box.There is a external AC rectifier that can generate 10 - 12V DC from AC.
If AC is active, then regulated 3.3V will be the supply of Band Gap and DC to DC booster.
If AC is not active, then...
Hi, I am beginner of AC power. I am designing an IC that has a AC (120V or 220V) detect function. If AC line is active then the IC will regulate it down to 3.3V and this 3.3V will be the power supply for a micro-controller. If AC is not active, then the IC will use a 3V battery and then create a...
if this mosfet is in subckt form.
I tried .probe I(*) but it didn't work!
You just don't see mosfet terminal current no matter how.
By the awy, I am using AvanWaves to plot waveforms.
thanks a lot
Hi, I came across this multi-stage comparator circuit. Is anybody familiar with this structure? What is the purpose of the cross-coupled nmos load (M3, M4) under the diff pair? Also, what is the purpose of M6~M11? What is the advantage of this structure?
Thanks!
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