What essentially happens when you increase the Base Current in a …
Jun 11, 2023 · For an NPN transistor: In an NPN transistor, increasing the base current (consisting of electrons) does not directly cause more electrons to be injected from the emitter …
npn - Transistor collector emitter saturation voltage - Electrical ...
Aug 24, 2021 · Relative to the emitter, as shown for the pnp transistor, when the base-emitter voltage is greater than the collector-emitter voltage the BJT device is operating in the …
What are the tradeoffs between NPN vs PNP power transistors?
Jan 7, 2024 · When looking looking through the regulators datasheet, they provide examples (see figures 4 and 5) for external NPN and PNP output transistors for achieving currents > 150mA …
NPN transistor calculations and Ltspice simulation
Apr 26, 2025 · The application is a simple amplifiers (single transistor). We are using a stiff voltage divider at the base and RE resistor to make the circuit work reliably, independent of …
Using a transistor to control a LED - Electrical Engineering Stack …
Dec 30, 2020 · I think I get it right so far (I hope.) Now I am trying to turn on/off the LED using a 2N2222A NPN transistor: simulate this circuit I looked it up online and find most people …
Single transistor level up shifter - Electrical Engineering Stack …
Sep 12, 2013 · I need a simple, single directionnal level shifter for 3.3V -> 5V conversion. There are many options on the internet, some using a logic ic and some using 2 NPN transistors …
How does the current travel in Bipolar Junction Transistor (BJT)?
May 20, 2017 · The direction of the arrow in the transistor symbol (between base and emitter) tells you the direction of current: Note that "electron current" is the opposite direction from …
ltspice - Calculation of transistor values using hFE - Electrical ...
May 17, 2024 · I provided a very simple NPN transistor set up and hFE values as shown below. 2N2222 datasheet I am trying to calculate parameters such as base current, collector current, …
What happens when base voltage is higher than the collector …
Aug 12, 2020 · Does the base voltage has to always be (0.7v) in order for a bipolar NPN transistor to work? what happens if the base voltage increases or decreases? I'm really not into the …
Clarifying how a NPN transistor can act as a switch with a LED in a ...
Sep 22, 2022 · I'm experimenting with a simple transistor/LED circuit but after reading many articles online I still can't tell if I have a faulty transistor or things are working as expected. …