New answers tagged

3

Ever heard some names of digital modulation methods? such as "16APSK" ? Or more general names like amplitude, frequency and phase shift keying? You should also know where they are used and to achieve what. I guess you should find whole systems which use digital modulations, what devices in the systems can be purchased separately to perform ...


1

That is not a transistor. It's a EUP3482A synchronous buck regulator. Which is not obvious from the picture as there is no surrounding components visible.


17

It's probably a 3 pin EMI filter like this but pin 2 isn't used: - There's just a hint of circular clearance around the middle pin where the copper plane is removed (within the silk screen rectangular outline for EM3): - It's possible that it's a C-L-C type where the centre-pin is a common point for the two outer pin capacitors and also there's an inductor ...


10

They are EMI filters. They are just ferrite beads or inductors, and they do exist in 3-pin versions as well. The three pin versions have a capacitor inside them, with one leg connected to middle of two ferrites/inductors, and the other leg is pin 2 for ground connection. In this case, the part value of 101 would mean an EMIFIL with 100pF capacitance. If it ...


-1

I had the same experience with the slew rate being extremely low, Around <0.5V/us. I bought mine in banggood for pennies. Fortunately I had genuine ones from TI to compare with, giving the expected > 16V/us.


4

It seems like this is a Power-On-Package from Vicor. They call these modular current multiplieres (MCM) and they are basically step down converters. They aim to drive these with their modular current drivers (MCD) with a voltage of up to 48V from the mainboard and step the voltage down only a few cm from the current hungry IC (that might draw up to 640A peak\...


1

It's a 10V/1uF tantalum capacitor, similar to that shown in this datasheet.


1

That’s a 2-terminal current source.


0

If you have access to a curve tracer, I suggest you examine various candidates, and select part numbers with high Early Voltage (flatter output curves). This parameter controls the power-supply-rejection of these devices,


0

Start with TIP122, TIP125 pair. You can use it in many places. They have excellent current gain and fair enough voltage and current rating. For even higher power rating, you can go to TIP142, TIP147. For a bit lower power, BD139, BD140 pair is a nice option.


3

Although I can't answer the details about the variations of the YX8018 (with or without a B suffix) it is a solar LED driver, similar to the YX8050 whose output waveform I captured in a previous answer. The datasheet for the YX8018 shows a sample schematic like this: The inductor (marked "L" in the schematic), required for the boost converter ...


0

I suppose, you are speaking about active analog filters using integrated amplifiers like opamps ? During the design process (calculating passive parts values), these active elements are treated as ideal. Primarily, this applies to input impedances (assumed to be infinite), output impedances (asumed to be zero) and the gain (assumed to be infinite and ...


1

Think in terms of tolerance and error propagation. Your components have finite tolerances that can be 20% or worse when it comes to capacitors. Even worse than that if the capacitors are ceramic and have a DC bias on them. If you have a large component value spread the largest components will dominate the tolerance of the filter poles and zeros, to the ...


3

Any electronic component or module you buy for a project or design should have a data sheet. By data sheet I mean a portable document format (PDF or equivalent) like this: - Do not assume that the product will be OK based on marketing/sales claims without researching the fine detail in the data sheet. This is why you need a data sheet so, do your homework ...


5

They are zero ohm links. Maybe mainly used as jumpers on this single sided board to allow for a track to run under them, but they have other uses, see What is the usage of Zero Ohm & MiliOhm Resistor?


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