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.
I guess I have to stick with this one since photodiode is not available in my country.
I have to make a characteristic graph between the Voltage (V) of the incident beam with the power measured (W).
I'm thinking out make a voltage divider circuit like this (Common collector), I guess measuring...
Hello everyone,
I need to measure the power (in Watt) from my laser beam (red - 630nm Wavelength - 10mW max power) as a part of my project.
I have to use phototransistor as it is a compulsory part of the lesson.
It seems that all the documents related to my problem is associated with the...
Thank you again for your patience.
I've read all those textbooks.
For all the cases i'm going to consider, I have a differential voltage +Vid/2 applied to XM1 (Gate) and -Vid/2 to XM2 (Gate).
And I this case to consider: the additional resistor is put between XM3 and XM1 like this
Why in this...
God, i think i just messed everything up.
Thank you for your explanation.
I will run the analysis again thoroughly, can you judge it for me pls?
Thanks a million :(
Hence, for the first position, I just replace (ro2 || ro4) with (ro2 + XR2) || ro4 in this equivalent circuit
This is the second position that i was talking about in my previous reply
v3 you mentioned is vg3 = (gm1 / gm3 ) * (Vid/2)
I thought XR2 has nothing to do with this vg3 ?
Thank you...
One more small question here,
If i put the resistor in this position
I'm trying to determine Rout1 using the impact of the current mirror feedback,
So, is it gonna be: Rout1 = (ro2 + XR2) || ro4 ?
and if the position of XR2 is in the upper position, Rout1 = ro2 || (ro4 + XR2) ?
Thanks a million
Thanks a lot :D I am not really good with these kind of circuits and stuff :(.
So, the XR2 will stay in parallel with the current source and the output resistance ro2||ro4 ?
The value of that resistor is not really important since I'm trying to compute everything "in theory" :D.
Thank you for...
I just don't know where to put that additional resistor in this equivalent circuit to compute all that parameters.
And I have to make comparison between my calculation and simulation.
Good afternoon.
I have been given a circuit like this: note that it has an additional resistor compared to the original one.
I believe this is a CMOS two stage amplifier in 0.8um technology.
I need to find out the operations, equivalent circuit and Av, Ai, Zin, Zout from this circuit. However...
Thanks,
Can you provide me the formula to calculate the frequency & duty cycle from your 2 methods, thanks.
I havent tested yet but can this provide me a nanosec high time? i mean, in theory.
Thanks
Hi,
I am working on a circuit of generating a squarewave (f = 40kHz) with a HIGH time of several nanoseconds ( i.e t = 10ns) using 555 ICs. (In this case, the duty cycle is 0.04%)
I'm using a 555 monostable mode (Pic 1) with an external trigger (Pin 2).
.
Here's my plan: 1st, I generate a 40kHz...
OMG,
What are you guys talking about, i dont understand even half of it :( Sorry.
For further specification, I have a pair of this ultrasonic transducers and this is a recommendedPCB of the manufacturer.
Guys, please help me:
_ What's the input signal of the transducer ( As far as i know, it's a...
Hi,
Thanks for all your helps but i'm quite confused.
The real problem is, i have a pair of ultrasonic transducers and i want to build an ultrasonic cleaner with that.
It's a fixed 40kHz transducfer, and the manufacturer also recommend a PCB of their own or the transducers to function;
However...
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.
