Need help on a time-invariant circuit design assignment

Thread Starter

hajime878

Joined Jan 14, 2018
4
Hello everyone,
I got a circuit design assignment that I have no clue at all about it. I have to design a time-invariant circuit that provides input-output characteristic as shown in the image below,



The design problems are specified below:

  • continuous-time, memoryless, time-invariant circuit
  • The design uses MOS (ALD1101, ALD1102, IRF510, IRF9510)
  • The characteristic need not be a sinusoidal function.
  • Uses 1-V supply
  • The challenge is to maximize the swing V_0
note: the horizontal axis is V in and not time

Really I have no clue at all about this problem. The only approach that crosses my mind is to implement time-invariant system y(t) = sin(x(t)). But, I am sure that it is not the solution to the problem.

Your time and help will be greatly appreciated. :)

Mod: moved to Homework
 

Thread Starter

hajime878

Joined Jan 14, 2018
4
While I was waiting they are n and p MOSFETs so I'll just solve it if u ever figure how to reply I will tell u
Sorry for the late reply. Yes i was also thinking about Vo(t) = sin( Vo(t) ). But how to implement?
And notice that one of the design problem is the voltage transfer characteristic need not to be sinusoidal. So i was thinking about the other approach that i have not known, instead of Vo = sin Vi
 

petecubed

Joined Jan 14, 2018
9
Vout(t) = 10 Vin(t)
Vout(t) = sin {Vin(t)}
are time invariant
The first one is a linear amplifier with gain 10
The second is a non linear amp who's gain depends on input voltage

Vout(t) = t Vin(t)
Vout(t) = sin(wt) Vin(t)
Are time varient
The second is a signal modulator

Great convo so far

But how to implement ?
 

petecubed

Joined Jan 14, 2018
9
Yea cool
So u want a non linear amp
If not sinusoidal then what exponential
Gain depends on input voltage
Set the bias level of a fet amp near its gate pinch off region
 
Top