Hot answers tagged

5 votes

What's is this? An SMD Voltage Regulator?

Ti part marking lookup yields a result with LFNB. This leads to LP3981IMM-3.3/NOPB, which seems to be compatible with your pictures in terms of pinout.
Nipo's user avatar
  • 1,375
4 votes

How to write the equation for the input side of a JFET?

The text has provided Vi=Vgs+VRs but I do not understand how this equation came up. This equation is a KVL equation. The left side is a voltage rise from 0V across RG. The right side is the sum of ...
RussellH's user avatar
  • 13.6k
4 votes

How to write the equation for the input side of a JFET?

I do not understand how this equation came up It's as easy as this: what ever voltage you have at the input with respect to 0 volts (\$V_i\$) must equal the voltage between gate and source (\$V_{GS}\$...
Andy aka's user avatar
  • 443k
3 votes

How to vary output current by maintaining constant output voltage?

Not unless you can change the valve's impedance as well. From Ohm's Law we have Z = E / I, if voltage E is constant and current I changes then impedance Z must also change. Edit: Now that you've added ...
GodJihyo's user avatar
  • 19.6k
2 votes

MOSFET gate driver current requirement for 2000 volt MOSFET

As per the data sheet of the MOSFET, the test condition is given at gate resistor 2 ohm and Vgs change as (18-(-2))=20V. So, as per this, the peak gate current requirement is 10 Amp.
Aziz_Infineon's user avatar
2 votes

Dual N/P-Channel MOSFET Dies with Smoke

When Q1 turns off, the drive is limited by the 47K resistor. The charge time is about R2 x total gate capacitance, or 47K x 3nf = 141us, and during this slow transition the n and p transistors burn as ...
Daryl Diamond's user avatar
1 vote

What might cause a sudden voltage drop in an airborne drone's battery?

Looks to me like cell blue (or its connections) was/were weak and failed, and the controller attempted but failed to keep the drone aloft by drawing maximum current from the remaining three. Blue ...
Spehro Pefhany's user avatar
1 vote

Why does disconnecting the receiving end of a transmission from the sending end increase the voltage at the receiving end?

Why does the voltage increase when the circuit is opened, but then decrease after 544us but not after 272us? The voltage increases when the circuit is opened, because of the inductance of the wire. ...
CallMeIshmael's user avatar
1 vote

Digital data transmission

Digital data transmission over computer networks is sending pulses of zero volt and 5 volts Not necessarily. This is the case for simple communication that isn't too fast, doesn't go too far, and ...
nanofarad's user avatar
  • 18.8k
1 vote

Why would an in series-opposition center-tapped transformer not be used to drive a circuit?

Sure, no matter how these two windings are connected, you can use one or both windings simultaneously as usual. They just have one common terminal. The two windings just happen to have common terminal ...
Justme's user avatar
  • 137k

Only top scored, non community-wiki answers of a minimum length are eligible