Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Dear all,
Is there any way to combine WaveView and Cadence ADE together?
The follow is my workflow:
1. use cadence ade to generate hspice netlist
2. use hsipce to simulate
3. use waveview to check the simulation results
when the simulation file is big, it's suffering to wait for the results...
Hi,all
For NMOS LDO, we usually thought it intrinsic stability. And I'm sure for high load, the LDO is stability. But how about light load, or no load? For that condition, the output shows a low frequency pole. So, there are two low frequency poles, and it's hard to make good phase margin.
So...
first you need a installer to install the common and Linux file. After you finish the install, you need configure your shell configuration file. (bashed or cshrc ) you should specify the hspice path and license path
You can draw this curve by running a DC analysis (swept the Id current). Suppose you want to plot the curve of M1, you need write a file like this:
save M1:opponent
Then you should include this file in your lib. After running the DC analysis, you can see the gm vs I'd curve in simulation results.
Thanks for your reply, prcken.
The vin pad is the power supply pad.
I don't know what's the different between the nmos and pmos cap for this application.
In our design, we usually use the ggnmos structure as the ESD device. I'm a little worried about that the gate of nmos cap might be...
During low voltage design, we would like to connect a cap between vin and ground to clean the power supply. And if we use a nmos as the cap, how could we protect its gate?
I have draw a pic to illustrate the question
Please forgive me I did not make it clear.
Let's say that I need to design a boost converter. Vin=5~30V. So, I need design an internal power supply block. In this block, I designed a constant gm to generate current. So, I need a start up circuit.
But I don't know how to design a start up...
I need to design a boost led driver with a current source. So, the feedback factor equals to 1. and the switching frequency is 100k to 1MHz. So, I wander if it's possible to compensate this boost inside the chip.
I'd like to know what's the advantage of constant off time control method contrast to other control method ( constant on time and pwm method ).
And it's appreciated if any one could tell me the optimized relationship of the off time and working parameters (such as VIN, VOUT, ILoad...)
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
