Re: Need help to design a transimpedance amplifier
I read through a few post, you want to detect from 200nA to 100uA with BW>=1MHz. You can do it in one single stage with feedback resistor of 50K. The output range is from 10mV to 5V. This is not hard
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Alan Liu
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#90123
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Re: RC circuit time delay value not correct
Reminder: When you joined this group, you read the instructions saying that pictures of schematics are not helpful, and should not be sent as a replacement for the schematic itself. It was
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Andy
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#90154
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Re: RC circuit time delay value not correct
wikihanya wrote: "... since the RC value is 100ps. it should introduce a delay of 100 ps ..." That was your mistake. An RC network has a frequency-dependent delay, not a constant delay. For the
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Andy
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#90111
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Re: RC circuit time delay value not correct
wikihanya wrote: "... since the RC value is 100ps. it should introduce a delay of 100 ps ..." That was your mistake. An RC network has a frequency-dependent delay, not a constant delay. For the
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Andy
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#90112
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Re: Henry's current transformer problem
For some ferrites, the Curie temperature, at which Br falls to zero, is not far above 100 degrees C. With best wishes DESIGN IT IN! OOO ¨C Own Opinions Only <http://www.jmwa.demon.co.uk/>
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John Woodgate <jmw1937@...>
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#90109
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Re: RC circuit time delay value not correct
An RC filter does not 'delay' signals, but low pass filters them, with a frequency dependent phase delay. An RC value of 100ps says that the step response gets to 1/e of the final value in 100ps. --
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Richard Damon
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#90171
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Re: RC circuit time delay value not correct
We don't know, because you have not uploaded your .asc file to Files => Temp on the list's web site. When you have done that, we can run it to compare our results. Even in this apparently simple case,
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John Woodgate <jmw1937@...>
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#90107
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Re: RC circuit time delay value not correct
Hello 4cwnirjjs53rhghqimgmcb5zflk7qn7mkdjgphlk We can't see the screen of your computer. Please upload your example in the section Files\temp of this group. Regards PhB
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@theeten2
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#90136
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RC circuit time delay value not correct
Hi, i am new to LTSPICE. i am simulating this series RC circuit with an input of 1GHz. sine wave. since the RC value is 100ps. it should introduce a delay of 100 ps to the voltage across the capacitor
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WIKI wiki
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#90105
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Re: Henry's current transformer problem
In another post you said your fundamental frequency is 50 Hz. Are you sure that this ferrite core is suitable for a 50 Hz CT? Normally, low-frequency CTs have nickel-iron cores. With best wishes
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John Woodgate <jmw1937@...>
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#90243
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Re: Sub circuit heat dissipation not showing
Brad, One of the frustrating things for me about this conversation, is that I don't think you have made clear what you are simulating, and what your problem or question is. You referred to a TIP142
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Andy
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#90126
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Re: .wav files
Hello Teodor, Please run the examples you got wit LTspice. wavein.asc, waveout.asc, ring.wav C:\Program Files (x86)\LTC\LTspiceIV\examples\Educational Best regards, Helmut
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Helmut Sennewald
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#90103
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Re: Sub circuit heat dissipation not showing
Hello Brad, Ctrl left mouse click on the plot formula in the waveform viewer. LTspice will then show a small window with the average power. Best regards, Helmut PS: Second attempt to write an answer.
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Helmut Sennewald
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#90127
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.wav files
Hello, I do have a problem in using a .wav file as a input voltage source. I have followed the instructions of Spice Guru Simon Bramble in this video: LTspice: Voltage Sources (Importing and Exporting
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Teodor Vasile
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#90102
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Re: Sub circuit heat dissipation not showing
Nit: "there is **no such thing** as 'RMS power'." Well, there is, but you wouldn't find it a useful thing to compute. As you said, it has no physical significance. So nobody ever calculates RMS power.
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Andy
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#90124
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Re: Sub circuit heat dissipation not showing
Hello Brad, Ctrl left mouse click on the power formula in the waveform window. Then you will get a single number which is the average power. Best regards, Helmut
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Helmut Sennewald
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#90140
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Re: Sub circuit heat dissipation not showing
Not an answer to your question, but there is **no such thing** as 'RMS power'. The product of RMS voltage and RMS current with zero phase difference is 'average power'. For pedants, one can calculate
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John Woodgate <jmw1937@...>
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#90101
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Re: "4 GROUP.zip" upload
Thanks Andy, I'm still working on fully understanding your post. Thanks Bordodynov, I added your 2 model.s The BS250P returned and error. "Error on line 602 : .model bs250p vdmos pchan rg=160
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kinarfi
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#90236
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Re: Need help to design a transimpedance amplifier
Hi there,Please, Please see an Idea I have posted in the Temp Folders of this group. (Photo Amplifier15.asc) Best regards,Michael P Kiwanuka To: LTspice@... From: LTspice@...
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Michael Peter Kiwanuka
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#90099
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Re: Henry's current transformer problem
From the available data we have not seen Br depending temperature change from 25¡ã C to 100¡ã C. Bordodynov. 05.08.2016, 15:56, "hkafeman@... [LTspice]" <ltspice@...>:
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#90108
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