Brad Levy
www.bradlevy.com
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Activity overview
Latest activity by Brad Levy-
Brad Levy commented,
Jan, in DS PCB, a power plane is defined as a PCB copper/electrical layer dedicated to a particular electrical (like ground) associated with it. A shape on a regular layer is not considered a power...
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Brad Levy commented,
It is possible to do the PCB layout without a schematic. The message you are getting "Unable to add nets because there are no net classes in this design" would normally be due to not having selecte...
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Brad Levy commented,
Below you'll find a table I generated with a spreadsheet, showing the results of the six cascaded nodes. The green columns indicate the comparator output for each node (which drives the LOAD line/L...
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Brad Levy commented,
By the way, for signals in this frequency range, if I needed 6 or more chained nodes of a function that didn't happen to be the same as the internal stage of an A/D converter, I'd probably still us...
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Brad Levy commented,
I'm not saying you set out to design an A/D circuit. But I recognized that your nodes happen to be doing the exact same thing as stages of one method of A/D conversion do. So why not take advantage...
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Brad Levy commented,
Here is a chip that will give you 10 nodes in a single 28 lead SSOP package:https://www.analog.com/media/en/technical-documentation/data-sheets/AD9200.pdf(It does need a clock signal, easily provid...
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Brad Levy commented,
Doing the gain-of-2 using a second op-amp stage is a good plan. Regarding choice of op amp, there are many to choose from. Quite a few of them are low voltage, eliminating them from consideration f...
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Brad Levy commented,
Analog switches are like electronic (vs electro-mechanical) relays.Not being mechanical, they are much faster than relays, and the control input is much lower power than a relay coil. But like op a...
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Brad Levy commented,
You've got a fundamental issue with T1 in that if V2 is 2 volts, you won't have enough Vgs swing to turn T1 on. I'd look at using something like the ADG1419 analog switch rather than the FET. You'...
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Brad Levy commented,
The 741 op amp is totally inadequate for a 25 MHz signal. (741 gain bandwidth is around 1MHz). The comparator is also likely to be totally inadequate, depending on whether V2 falls within the range...