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Dear all,
I am looking for some commercially available buck converter with high switching frequency (10-20MHz). I want to use it in my envelope tracking application but I could hardly find upto 6MHz switching frequency. Does anybody have an idea where I can get those or if someone has used or...
I have question regarding fft function in matlab. If I do something like:
t = 0:0.001:0.6;
x = sin(2*pi*50*t)+sin(2*pi*120*t);
y = x + 2*randn(size(t));
plot(1000*t(1:50),y(1:50))
title('Signal Corrupted with Zero-Mean Random Noise')
xlabel('time (milliseconds)')
Then which window is being...
Hi Everybody,
I have a PWM signal, which has variable ON time as well as period. Can anybody tell me how to calculate its period in Matlab for every cycle. If anybody can tell some circuit to do it I will highly appreciate it.
Thanks.
Hi Everybody,
I am layouting a rail to rail op-amp. Obviously, at the input of OPAMP I have both NMOS and PMOS diff. pair in parallel. I want to use interdigitation technique for those diff. pair. Can any body suggest me how to layout those four input devices to make layout more symmetric.
Hi,
I have no experience in layouting but i need to layout my first design which is Folded cascode ota. Can anybody provide any tutorial where i can find step by step explained layout of any kind of analog circuit. I looked in Hastings book but problem is he just focuses on making individual...
Re: Comparator design
Hi dedalus,
let me clear what you say. If we make the cross coupled devices the same size as diode connected load then we should not see any hysteresis provided we set the DC sweep interval very small like 1e-3. right?
I also observed another thing that if we make our...
Re: Comparator design
Cross coupled devices have negative resistance viz -1/2gm and if they have the same size as diode connected devices then it means total resistance will be zero and no positive feedback will be there. Also if you look into Allen Holberg page no. 471 he says " If positive...
Comparator design
I am designing hysteresis comparator (see the attached schematic). I am facing a strange issue. Even when i make the cross coupled PMOS devices (M10, M11) equal in size to the diode connected load (M3, M4), i still get 13 mV of hysteresis and even if i reduce the size of M10...
Create your signal in Matlab and look at the PSD of your signal. It will give you an idea about how much bandwidth is needed to accommodate 90-95% area of your PSD.
Let me put it in a more clear way. I have to compare two signals say both are sinusoidal (so other reference is also sinusoidal). One sinuosoidal has average value of 0.8V while other has average value of 1.2 volts. btw, it will be an on chip so, plz suggest something accordingly
I have an input sinusoidal signal going -1V to 1V. There is no common mode in it, how can i apply it to hysteresis comparator with needed hysteresis =50mV.
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