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Dear all:
I use hspice to calculate the gaim of different OP. But there are some problem.The circuit has been shown below.
Now I have a problem. If I just calculate the one output gain, for example:：.AC gain Find Vdb(out1) at =1
It is OK, the gain =40dB
But if I...
Dear all:
I use the hspice to simulation the circuit. But in the output file of hspice, there is so many information about library:cry:. Hspice will output all the library which include in *.sp. And at the end of output file, there are information which I need.
How to off the output...
hspice sweep
Dear all, I want to use the function of .DC in the hspice to get the best choice.
But I meet a problem: I can not use DC Sweep with more than 3 parameter?
For example
.DC VIN 0 5 0.1 //This is OK
.DC VIN 0 5 0.1 L1 1u 10u 1u //This is OK
.DC...
The node name of HSPICE
Dear all, I am now study hspice. Someone tell me that letters which follow numbers in node name are ignored. For example, 1A and 1B means ONE node.
But I do not know the node of NET100 and NET100N is the same node?
Deal all:
I have plan to study Hspice. So I have search the document of Hspice. Unfortunately, I just find the Hspice for 1998.04. But in Lab, the version is 2004.09,so who can give me the manual of hspice 2004.09.
Thank you :)...
Dear all , I have do some study about BSIM3 Model. In the reference of Allen analog book, I find a book about BSIM3 Model, this book is
MOSFET Modeling and BSIM3 User's Guide
Yuhua Cheng, Chenming Hu
1999, 484 p., Hardcover
but I can not search PDF file about this book , Someone can help...
Deal all:
Today, I study the R-2R DAC, I find that I can not calculate the voltage by hand.
I draw a pic show below.
If S4 is high, it is easy to calculate that vout is 1/2 vref, but if S3 is high and the other is zero, how can calculate the vout by hand? I calculate it...
Thank you, I have down the book,
But some one can give me a paper about it ?
Thank you:)
Added after 3 minutes:
I have read the Razavi book, but in this book, the shematic is too simple and I have not find a total schematic use low voltage cascode. I can not find bias part schematic, so...
Dear all:
I have some trouble with learn about low power cascode structure, I have see some book, but none of them can give more advice and analyse about low power cascode structure.
Someone can give me some advice about this structure?
Thank you :)
layout
hi, I am beginer of layout. As I know, the basic layout is draw each transistor by youself.But now,we have some EDA tools such SE/Astro,this tools can auto P&R.
Dear all:
I am a green-hand of Digital layout. Unfortunately, I have no software such as SE or Astro, I just draw layout by hand with Virtuoso.
Last week, I draw a 8 bits adder, I have finish this week, DRC and LVS is OK,but the size is too large, Bus wast too many size...
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