Nick Alexeev
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See all »ESD precautions can save a lot of tedious failure analysis. A very inconvenient thing about ESD is that a failure can be attributed to ESD only by ruling out every other possible cause. ESD failu...
posted 1y ago by Nick Alexeev
[Disclaimer. This is not for an academic class. I'm self-studying.] I’m reading an introductory book on DSP for audio and computer music [Steiglitz 1996, ISBN 0-8053-1684-1 p. 287]. One of the ...
4 answers · posted 1y ago by Nick Alexeev · last activity 9mo ago by Lorenzo Donati
If a data sheet gives the thermal noise (of +3/-3 standard deviations) as 1 uVpp does it mean that out of every thousand samples, 3 will have noise more than ±1 uV at any sample rate? 1000 sps wi...
posted 8mo ago by Nick Alexeev · edited 8mo ago by Lorenzo Donati
What are the essential safety features of such types of hardware? One option to make such hardware safer is to make it battery powered. What other safety features are generally recommended? ...
posted 8mo ago by Nick Alexeev · edited 8mo ago by Nick Alexeev
[I used to work at Microchip.] Is it [node size] at all important [for power management ICs] ? For power conversion ICs cutting edge MOSFETs on the scale of 5nm aren't important, because powe...
posted 5mo ago by Nick Alexeev · edited 5mo ago by Nick Alexeev
A MOSFET has its gate, source and drain on the top side [1]. These structures are sitting on top of the substrate, which is also called body or bulk. The source and drain are n-doped, while the...
posted 3y ago by Nick Alexeev · edited 9mo ago by Lorenzo Donati
[I’m asking this question out of curiosity. I understand that this aspect of the CAN bus specification is what it is, and can not change.] The ACK bit in any CAN data frame is dominant. Each rece...
2 answers · posted 3y ago by Nick Alexeev · last activity 3y ago by Olin Lathrop
I want to create a schematic symbol and reuse it for multiple ICs which have identical pinouts. For example, OpaMPS, or the venerable SN74LS00, SN74HC00, SN74HCT00. How can I do this in an Altium...
1 answer · posted 1y ago by Nick Alexeev · edited 8mo ago by Lorenzo Donati
A few months ago, I too was looking for answers on how to connect the USB shield with ESD in mind. I always connect the shield through a resistor to ground and a capacitor to ground (100kΩ and 0.0...
posted 3y ago by Nick Alexeev · edited 2y ago by Nick Alexeev
[In addition to what Olin wrote earlier.] I looked-up one of the references from the textbook, and I may have found the answer which the author had in mind. This entire spectrum must not be pas...
posted 1y ago by Nick Alexeev · edited 1y ago by Nick Alexeev
I'd rather use the AD4111 as a high-side current sensor, instead of creating an "inverter" which would generate an equal and opposite current. Each current input of the AD4111 (IINx+ and IINx-) is...
posted 12mo ago by Nick Alexeev
If you put the Fat load-dump TVS downstream of the reverse-polarity protection MOSFET [1], then the load dump current would have to flow through the MOSFET. The MOSFET would have to be rated for t...
posted 11mo ago by Nick Alexeev
In this case the antenna connector is the standard horrible little U.FL, which is connected with coaxial to a bigger one grounded to chassis. The main ESD risk is when someone is connecting or re...
posted 2y ago by Nick Alexeev · edited 7mo ago by Nick Alexeev
What you are proposing may be okay (depending on other specifics of the design), but your proposed 4-layer PCB stack-up looks like a compromise. Clock is a high speed signal, and so is SPI dependi...
posted 5mo ago by Nick Alexeev · edited 5mo ago by Nick Alexeev
Another solution which uses an ADC to read the three-state pin on the battery charger IC. The original question mentions GPIO, and doesn’t mention ADC. Maybe this will be useful for some other de...
posted 3mo ago by Nick Alexeev
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