bcdeepak
Member level 5
i designed an inductively degenerated common source LNA
as my s22 is veryless i some what added a resistor of 15ohm at the output , so now s22 is improved to 10.9db
i resimulated the ckt with that 15 ohm and noted the s-parameters.
the calculated stability factor K(from S-parameters) is 69 , i know that if k>1 the ckt is stable
but here my K is too much greater than 1 , is this value of K acceptable ?? or is there any wrong in the ckt ??
deepak.
as my s22 is veryless i some what added a resistor of 15ohm at the output , so now s22 is improved to 10.9db
i resimulated the ckt with that 15 ohm and noted the s-parameters.
the calculated stability factor K(from S-parameters) is 69 , i know that if k>1 the ckt is stable
but here my K is too much greater than 1 , is this value of K acceptable ?? or is there any wrong in the ckt ??
deepak.