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MOS differential pair

 
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STOIKOV



Joined: 18 Nov 2005
Posts: 295
Helped: 6
Post19 Sep 2006 6:59   MOS differential pair
I'm trying to deduce the differential output current of a MOS differential pair, but have doubt in one step (showed in the picture).

Could please give me some advise ? Thanks.

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wpchan05



Joined: 16 Feb 2006
Posts: 93
Helped: 8
Post19 Sep 2006 11:59   Re: MOS differential pair
By solving the quadratic equation in which Id1 is the only variable, you can get the result.
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STOIKOV



Joined: 18 Nov 2005
Posts: 295
Helped: 6
Post19 Sep 2006 22:14   Re: MOS differential pair
ok thanks, now already got ID by hand with general quadratic formula.

How can a variable be found in matlab by just intoducing the coefficients a,b,c of a quadratic equation, like this equation ?
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drabos



Joined: 03 Jan 2006
Posts: 415
Helped: 25
Post25 Apr 2008 22:34   MOS differential pair
for example:
a=(a number); b=(a number); c=(a number);
y=roots([a b c])

or y(1)=(-b+sqrt(b^2-4*a*c))/(2*a);
y(2)=(-b-sqrt(b^2-4*a*c))/(2*a);

As you wish Smile
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