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.
Tnx Dominik! I agree about the problems that parasitic caps may generate. I will most likely use the approach in the paper you said.
Thanks for your comment! Frankly I could not quite understand what you said. I have not worked with Synopsis products for a while, but as far as I remember they...
Hello,
I am looking for a common centroid layout for a binary weighted DAC and in a thesis online found an arrangement, but I have had a hard time figuring out a pattern in this placement. The figure below is the capacitor array placement and each number in this figure (i= 1, ...9) shows to...
Hey, thanks for the description. I guess I should have explained my question more clearly, sorry about that. Assume you want to design a 10-bit SAR ADC with 1MSPS output. So the internal clock would be 12 MHz, I have attached a picture from a thesis showing required clocks for a 10-bit SAR ADC...
Hey. Sorry I didn't get what you mean. How crystal can help?
Basically my question is that assume having only one master clock, how and with what circuit one can generate all other clock signals required for the SAR ADC, including clock for the input sampling, resetting capacitors, and resetting...
Hi,
I was looking at several theses on SAR ADC and could not find a way to generate required clock signals for sampling the input signal, resetting capacitor and comparator, ....
Assuming we have only one clock signal for the SAR ADC and we want to generate all required clock pulses internally...
Thanks for your comments, they were really helpful. But a few questions:
I didn't get it, for a CMFB like this how you can compensate it? There is also one issue with a CMFB I designed, one is similar to the one in the pic I posted before, that CMFB and the whole opamp work when I put them in...
Hi,
I'm going to design an opamp to be used in a continuous time system. I have seen several different structures for the CMFB part, including the one attached below. I want a CMFB which has a wide dynamic range, so I guess I need to use resistive averaging, but still I have a few questions...
If I didn't get you in a wrong way, you mean 2-bit ADC is going to be the internal converter in another circuit. In this case, you can use delta sigma ADC and get much more resolution from that 2-bit ADC, due to the noise shaping and oversampling. Probably you need to take a look at a book...
Hey guys,
I am going to design a 4th-order bandpass delta sigma, with a 4-bit internal ADC. I tried to use schreier toolbox for scaling coefficients, but I don't know how it works. I read its help, but it didn't help me!
To scale coefficients this function needs to be used:
[ABCDs...
I think impedance bridge doesn't work here.
There are many different assumptions that we can make that may result in the same results but there are just assumptions. I think there is no way but using some devices like Impedance analyzer or some thing like this for testing resistors over...
Tnx for reply. I connected probe alligator clips to the ground of the signal generator.
How can I be sure whether it picks up unwanted signal or not?
Is there any way to find out that this resistor is pure resistive or not with simple and common instruments, and how can I be sure that it is...
Hi dear all friends,
I had a problem with some of my measurements and then I decided to check experimental setup. I Used a small resistor (38.3Ω) in my circuit in series with signal generator and read its voltage for finding amount of current passed through circuit. But results weren't...
Thank you guys for helping me through this problem. I think problem is solved to me, FvM was right about parallel equivalent circuit. Take a look at this link:
Microsystem design - Google Books
Though the things mentioned in the above link is a little bit different frm the things described in...
As I told before, you can convert series circuit to the parallel one just with applying just tiny changes. As depicted in this link, and it's clear,
Capacitor - Wikipedia, the free encyclopedia
the only change is using Xc in parallel circuit instead of C.
Who can you justify that in series...
I know that it's a complex impedance, but you can find equivalent circuit which can be either series RC or parallel one.
In fact, it doesn't make any difference for me to choose which one of them. But, in both circuits (parallel or series) the value of capacitance would be a function of...
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.
