All Questions
Tagged with linear transistors
8
questions
-1
votes
3
answers
140
views
Active low pass filter is there any virtual ground point? If yes how can I derive?
I'm learning this MFB active LPF.
My questions regarding this as follows:
How to derive transfer function for this configuration?
Is there concept of virtual ground exist? If yes can you explain ...
- 303
3
votes
2
answers
707
views
What happens when Vdrain is greater than Vsource in PMOS Transistor?
So as I understand, if Vsd = 0 in a pmos transistor, then the current flow should be zero, and the same goes for if Vs<Vd, now my question is, in what state will be the transistor i.e. cut-off, ...
- 33
1
vote
1
answer
114
views
Transistor biasing arrangement
I am trying to learn about transistor biasing, and can’t seem to wrap my head around it.
First of all I’ll explain what I’m trying to accomplish. I’m trying to build a linear 0-100 V power supply ...
- 43
0
votes
3
answers
611
views
How to determine the value of the variable resistor to land on saturation region?
I'm trying to determine the Linear region of the transistor by setting an upper and lower limit for the resistor on the lower left hand corner. I've already fixed the lower limit and tried to find a ...
user140508
2
votes
2
answers
9k
views
Thevenin Equivalent of BJT Transistor
I wonder if I can replace a BJT transistor operating in active mode, with its Thevenin Equivalent, like this:
My guess is that I can, because the large signal model of the BJT operating in active ...
- 361
4
votes
4
answers
3k
views
Cheap, low-quality constant-current sink over wide voltage range
I'm looking for a cheap (as in: low component count, low PCB area, low component cost) way to put >= 1mA of load on a voltage that may be anything from 1.2 to 17 volts (minimum required load on a LDO ...
- 656
3
votes
1
answer
2k
views
Using LDO with Outboard Pass Tranistor
I need a power supply capable of supplying 7.5V at 6A using linear devices. To minimize power dissipation at this current level I have decided that using a LDO would allow me to lessen the power I ...
- 288
2
votes
1
answer
332
views
TO-3 Transistor replacement needed that does not protrude through the chassis
I have a linear power supply that uses two 2N3771G. They are TO-3 style, and are exposed outside the chassis, on the heatsink.
I need to move this power supply into a new chassis, for commercial ...
- 21