2024年12月19日 · Need help in designing a 3.3V input voltage astable multivibrator circuit that would generate a 1-second duration pulse periodically every 3 hours for microcontroller reset. Need it to be power efficient as it would be used for solar set up.

2015年6月26日 · What does "storage time" in a bjt transistor mean? For example, in the 2N3906 datasheet it says: I understand delay, rise and fall times... but is storage time the "delay time" that it takes for the transistor's current to start falling after it has been switched off?

2016年10月8日 · So.. here it goes. I'm going to try give my hypothesis, as to how these NPN BJT Transistors work. The Vebo (Emitter Base Voltage) is the positive voltage to be applied to the Base, to turn the NPN BJT Transistor on, connecting ground to Emitter. The Vceo (Collector Emitter Voltage) is the Maximum voltage I can have as my load (Collector to ...

2020年7月27日 · Hi Sam, Find the standard.bjt folder in your LTSpice, I use Microsoft Explorer to display the files This is my Path to the folder, Yours should be the same. Use a text editor to open standard.bjt file, you should see the list of all the transistors you have available. Paste the the transistor model text into that folder. Ask if you have problem. Update: For reference this is the …

2021年5月24日 · Hi there, in a common emitter circuit, I calculate the RE ( Emitter Resistor) and RC with Ib = Ic / BF R3 = (Vcc - Uce - Ure) / Ic RE = Ure / (Ic + Ib) But these Formulas do not consider the internal resistors rb and rc. A comparison with …

2016年4月13日 · BJT vs MOSFET vs IGBT ==> BJT vs MOSFET vs IGBT vs (Normally-OFF SiC Junction Transistor) for example GA50JT17 vds=1700V id (T=25)=100A id (T>100)=50A Rds=20mOhm It works like a bipolar transistor. Current amplification factor of about 100. There is spice model. is fast enough (250kHz) td_on=17ns td_off=39ns

2025年1月4日 · I have made on breadboard the Colpitts oscillator previously simulated. It works but I have some spikes on output signal. what they are generated by?hereby schematics simulation output and asc.

2020年12月31日 · Hello All, I have been spending more time for watching and reading the tutorials to understand the functionality of BJT (NPN and PNP) transistors, JFET (N-channel and P-channel) and MOSFET (N-channel and P-channel for both Depletion and Enhancement modes), but I got confused and not understand...

2015年2月21日 · Hi! Ideal maximum reverse beta for BJT NPN 2N2222 is 0.1, according to Multisim. Here is my circuit: View attachment 80814 Q1 and Q2 are in reverse active mode. It should be Ic=Beta_reverse*Ib, Ie= (Beta_reverse+1)*Ib. We can calculate Beta_reverse as Ic/Ib. We get Beta_reverse=0.2504. However, this is higher than Ideal maximum reverse beta=0.1. …

2015年4月6日 · We treat BJT as a current controlled device, an current amplifier (Ic depending on Ib). In my opinion a BJT can be controlled either by voltage or current depending on the situation in circuit.