Mosfet vs BJT - Electronics Forum (Circuits, Projects and …
网页2008年5月16日 · The resistance can be modified by changing the "dimensions" of the MOSFET while the BJT's "diode voltage drop" can't be changed so easily unless the materials are changed. THis tends to make MOSFETs have less losses at the lower voltages but also means MOSFETs can be paralleled since …
BJT Current Drive Capability vs MOSFET - Electronics Forum …
网页2010年12月24日 · I think the MOSFET conduction channel may be more lightly doped or perhaps has a longer channel length then a BJT, which increases its on-resistance. Perhaps someone with a better knowledge of the transistor fabrication physics can enlighten us …
BJT and MOSFET- Switching and Drive - Electronics Forum (Circuits ...
网页2008年1月20日 · The MOSFET’s input capacitance must be charged from 0 to 10 volts from a voltage source that has limited current. In the case of a big FET the input capacitance is 2000pF and we need 15 volts on the gate. One of the differences between MOSFETs and BJTs is turn off delay (speed). If a BJT is kept from turning on hard it remains fast.
Why use MOSFET instead of BJT? - Electronics Forum (Circuits, …
网页2004年12月2日 · Any significant advantages? and what are the common application where MOSFET is preferred over BJT?
invert digital signal: BJT or MOSFET - Electronics Forum (Circuits ...
网页2018年3月4日 · AnalogKid said: To invert a 12 V signal and produce another 12 V signal, you will get more consistant performance with a BJT and a zener diode than with a MOSFET, meaning a more predictable trip point with less drift due to temperature changes and better repeatability from one component to another. ak.
Why does the offset voltage of a BJT make the BJT less attractive …
网页2015年6月9日 · A MOSFET on the other hand, when operated in triode region, its drain current vs. drain-source voltage curve goes right through the origin of the Id-Vds plane. Why does the offset voltage of a saturated BJT make the …
BJT or MOSFET for 4017 Relay Driver Circuit retaining High-Level …
网页2021年1月2日 · I'm designing a circuit whereby the output of a 4017B IC is driving a relay via a BC337-25 BJT Transistor (or maybe a MOSFET), but also want to ensure the output voltage remains high enough to drive other CMOS Logic Inputs.
whats the mosfet equivalent of a 2N2222 | Electronics Forum …
网页2010年7月16日 · Well when you need a general purpose BJT you just grab a 2N2222 from your "box", but now we move to fets/mosfets what is the equivalent ? easy to get and a good all round part. I'm after a 4 V full turn on gate voltage and a couple of hundred mA capacity in TO92 type case
MOSFET operation | Electronics Forum (Circuits, Projects and ...
网页2004年12月8日 · Hi hi, IM rather confuse with MOSFET operations on how it works. If i intend to saturate a N-channel MOSFET, all i have to do is overcome its threshold voltage is it? IS the MOSFET Vgs similar to the BJT's Vbe?
Mosfet vs BJT | Page 2 | Electronics Forum (Circuits, Projects and ...
网页2008年5月16日 · Actually, I'm looking at an International Rectifier IRF7201 datasheet, and it appears that around Id=5A, Rds~=.025 @ 10V and ~=.035 @ 4.5V.