Homework Statement
hello guys I have an assignment to "Explain six transistor characteristic curves using the construction and operation of BJTs"
I searched all over internet but couldn't find any article relevant.(i found lot of articles about characteristic curves but none of them...
BJT current issue help urgent
hello i have a problem with current and the convention and so on. bottom line for a bjt my professor said that Ie = Ic + Ib but the next slide he remixes it telling us that and i quote " the relatively large current flowing from the emitter to the collector is...
Homework Statement
"What is the physical origin of gain in a BJT?"
I can figure out gain using gain equations but am having a hard time describing the physical origin of gain in a BJT.. can anyone help?
Please view the attached circuit. I will be appreciated for any suggested answer, thanks!
Q1) Calculate the dc input resistance of the transistor amplifier shown in figure 1 below if the current gain of the transistor is 400:
I need some help on this one, i don't know the relationship...
Today I did a lab on BJT amplifier frequency response.
I got the fc1 and fc2,BW and F0 center frequency. The band pass turned out to be asymmetrical.
What i want to know is this.
Input V=40mVpp
output V=2Vpp
cut off V=1.41Vpp
When I turned up the frequency to 2fc2, i got about...
In this picture, as well as countless others:
http://en.wikipedia.org/wiki/Image:NPN_BJT_Basic_Operation_%28Active%29.svg
we have electrons flowing from emitter to base, and 'holes' from base to emitter.
Why the distinction?
When an electron flows from emitter to base, is it not the...
i want to know why at some point the low output voltage for a bjt biased between 0 and 5
on the base
and voltage 5 at the drain
ranges between 0.225v and 75mv so which of them is the low voltage pz answer me now i have a project to deliver
I was researching a bit about the common-base configuration of a BJT transistor on wikipedia, and I found this quote:
"This arrangement is not used as much as other configurations in low frequency circuits but is often employed for amplifiers that require an unusually low input impedance, for...
How does a small change in base current result in a large change in collector current in a BJT? Please explain in terms of movement of electrons (in NPN). Most textbooks I have referred say that the reason is low resistance of emitter-base and high resistance of collecter-base. However i cannot...
We've base biased circuit, voltage divider, emitter bias, and collector feed back bias...I'm looking for resources, to compare those 4 types, what are the advantages of each type, why is it used, and where...
I know BJT's work in amplifiers, but i need more detail concerning those different...
Hi, I'm new here. can somebody put here an a schematic of Class AB, D,G or T. I need an audio amplifier that work with bjt and mosfet simultaneously, i think that kind of amplifier is class g, but I'm not sure,for example i saw an 5000w amplifier with 2sc5200 and his pnp pair working with...
I thought that the base recombination current (say in a pnp bjt) was the current caused by the electrons that come up the base wire to compensate the loss of free electrons from the recombination process in the base. But recently I read that this are actually two different currents that sum up...
I'm really confused between saturation and amplifier. When will the transistor work in saturation mode and in amplifying mode? Resistors are the matters. We chose the resistors so that the transistor will work in saturation or amplifying. How can we chose?
In order to use BJT as a switch, it's very popular to do as the picture.
In the picture, V_B > V_E, so there's a current flow I_BE control the I_CE. In the other way, V_B > V_E generates the current I_CE, and the lamp will light on. But, I change the connection a little:
I'll let the V_B...
Hi,
I know how to drive a transistor as a switch, but I am not very sure how to perform voltage and current calculation and analysis at the collector to emitter side. Basically what I know is that if the base is biased at 0.7 V, the transistor will be switched ON and current will flow...