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here is the implemented circuit from a book but i am not able to understand how its implemented......can somebody explain to me ?
this technique is used to save the number of transistors.
Hi,
I am trying to understand DC biasing in a paper having 2-stage LNA implemented using FinFET in 32nm.
The width mentioned of first stage cascode is 1µm and second stage is 2.4µm.
The DC currents are not mentioned but overall DC power is mentioned which is 12mW
so, assuming 6mW in first...
Whenever you add a cascode device, some of the voltage from supply voltage will drop across it and hence reducing overall voltage swings of the circuit and that is nothing but headroom.
got Cgs around 40fF
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I done DC analysis of MOSFET both CS and cascaded stage by giving VDS as 0.6V(half of 1.2 my VDD) but when I connect them as cascode stage how to get that 0.6 v in between of two MOSFET
I think I have to play with VGS then but again all the values will...
I agree I am extremely noob in ADS and my aim really big.....but currently attending ADS paid session is not possible for me alone
so my last attempt to get cgs is,
ok I have attempted to get Cgs using following schematic, I hope its correct.
Now in display window I am not able to set AC.vgs=1...
Sorry my bad
I tried to take VAC source from sources frequency domain and placed it in series with DC VGS. Then I tried to change value of this AC source to AC_vgs=1 but it gives me error
am I doing correctly?
ok I will make threads
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ok. I actually didn't understood what you mean when you said following
As I try to change the VAC of AC source it gives me error
Now I have increased VDD to 1.8V
this is VG of MOSFET 1
Voltage between MOSFET 1 and MOSFET 2 is 1.08 so Vgs of MOSFET 1 is 0.72v
which is approx. same as VGs of MOSFET 2
Now drain current has increased to 8.48mA due to all this
how to compensate this current
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Yeah...
yeah. thanks for your comment . I will redesign it again. come to know my mistake
can I send you a friend request?
one last question is width of MOSFET is higher i.e. 20um at 60ghz? so that next time I will go with lesser width
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