16k views

### OR-ing power supplies (diode or mosfet)

I have got two power supply options on my board: USB 5.0V DC Power Jack of 5.0V My intention is to design a or-ing power supply option, as either of them will be used at a time. Possible solutions ...
12k views

### What is killing my MOSFETs

This is my first post here on electronics stackexchange. I am a hobbyits in electronics, and a professional in programming. I am working on a inductor circuit to heat a workpiece. I have a working ...
9k views

### Why MOSFET source is indicated with arrow ?

I know that , a basic MOSFET contains source and drain , and either it's a NMOS or PMOS ; it is indicated by an arrow at source . But let's look at a fabricated NMOS. Here we can easily see that ...
9k views

### What is MOSFET gate drive capability and why do I care about it?

Someone told me that this circuit has "poor gate drive capability": simulate this circuit – Schematic created using CircuitLab What exactly does that mean? I tested it with an LED as a load ...
19k views

### Why have a bulk terminal at all? (MOSFET)

I must be overlooking something but I really don't see the need to have a bulk terminal. I am studying the body effect whereby it somehow interferes with the threshold voltage. I don't fully ...
2k views

### Why does CircuitLab have the MOSFET symbols it has?

CircuitLab has [used to have -- they have changed their symbols since this question was asked] these goofy things: simulate this circuit – Schematic created using CircuitLab My eyes are much ...
7k views

### NMOS FET with a negative drain

I'm trying to create a switch between a -15V and +15V supply using a gate signal of 0V to +3V. With the positive-going Gate voltage, I tried an NMOS FET. This works as expected with a drain of +10V ...
4k views

### What does “no bulk” mean in MOSFETs?

The 3rd and 4th column in the image below (from wikipedia) says "enhancement, no bulk". What does "no bulk" mean?
4k views

### MOSFET bulk connection to the source

Why is bulk always known to be associated with source and not the drain? What would be the result or outcome if I connect the bulk to the drain instead of the source?
993 views

### How do SRAM bit line “gates” work?

I'm currently learning about the operation of 6 transistor static random access memory cells and I've hit a wall in understanding exactly how the read/write operations work. More specifically I don't ...
357 views

### Does linearity of a N-MOSFET continue for $V_{DS}$ below $0V$?

I operate a N-MOSFET (2N7000) in a simulator in the linear region very close to $V_{DS}=0$. In fact $V_{DS}$ is between $-50nV$ and $+50nV$. In the simulator the output seems linear, but is ...
342 views

### Why is there voltage out of the gate of my transitor

I'm a big beginner in electricity :-D I just discovered the "Circuit wizard" tool and I'm drawing a circuit with a "MOSFET n channel" transistor. As I understand, when there is voltage on the gate, ...
519 views

### Would a four terminal mosfet work equally well if the source-drain polarity were switched?

I noticed a question regarding mosfet polarity asked here and wondered whether a four terminal mosfet would behave the same way under reversed polarity. Since the four terminal mosfet has no internal ...