That's not a silly doubt. Actually for a mosfet to work as a constant current source, need to be in saturation. Based on this assumption, we need to keep both the nmos in saturation so as to function as constant current sources. Now the question arises, why mosfet at saturation is a constant current source? I will answer that if needed.
This is an assumption that can be confirmed. We know Vgs of M2= Vgs of M1 if nmos is in saturation it should follow the eq and give the same result for Id2. But if this condition is not met i.e assumption is wrong and M2 will be in triode. Completely depends on the value of Id2 (or aspect ratio).
If this is your first video on current mirrors it would have been helpful to spend a few minutes explaining the parameters - that is if you want people to learn properly rather than learn parrot fashion. For a good example of what I am trying to say ... Watch this video: th-cam.com/video/xR0RfmmRhDw/w-d-xo.html
English language doesn't use apostrophes to form plural. a) MOSFETs - plural of MOSFET b) MOSFET's - possessive of MOSFET Example: a) M_1 and M_2 are N-type MOSFETs. b) M_1 MOSFET's current is I_r, M_2 MOSFET's current is I_o.
Much appreciated
Current mirror with supply -indepentment Biasing with R
How is it takem for granted that M2 is in saturation ?
Here VGS and VDS are shorted which means they are at same voltage level and condition for saturation is VDS > VGS - VTh which is satisfied here
That's not a silly doubt. Actually for a mosfet to work as a constant current source, need to be in saturation. Based on this assumption, we need to keep both the nmos in saturation so as to function as constant current sources.
Now the question arises, why mosfet at saturation is a constant current source?
I will answer that if needed.
Tanmoy Gupta please do answer
@@Tanmoy101 please answer the later part also
This is an assumption that can be confirmed. We know Vgs of M2= Vgs of M1 if nmos is in saturation it should follow the eq and give the same result for Id2. But if this condition is not met i.e assumption is wrong and M2 will be in triode. Completely depends on the value of Id2 (or aspect ratio).
need a video for current steering circuits
how Vt of both mosfets is same. do we carefully select those mosfets which have same Vt or Vt of mosfet can be changed according to the demand?
Sir why we need two device in current mirror circuit
Nice explanation
very nice explanation
Good
Thanks for benefit and excellent information
Detailed Electronics lectures available in Urdu Language
Great
n mos current direction should be inside
For NMOS, when showing the direction on source terminal outside on body terminal, it should be towards inside.
nice lecture, but I hope you will improve you handwriting, it's quite difficult to understand what you wrote.
If this is your first video on current mirrors it would have been helpful to spend a few minutes explaining the parameters - that is if you want people to learn properly rather than learn parrot fashion. For a good example of what I am trying to say ... Watch this video:
th-cam.com/video/xR0RfmmRhDw/w-d-xo.html
English language doesn't use apostrophes to form plural.
a) MOSFETs - plural of MOSFET
b) MOSFET's - possessive of MOSFET
Example:
a) M_1 and M_2 are N-type MOSFETs.
b) M_1 MOSFET's current is I_r, M_2 MOSFET's current is I_o.
that is a pmos. how dumb!!
Nope