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https://designers-guide.org/forum/YaBB.pl Design >> Analog Design >> Quantify Amplifier Linearity: Is there a definition of linearity? https://designers-guide.org/forum/YaBB.pl?num=1251107685 Message started by Dave OB on Aug 24th, 2009, 2:54am |
Title: Quantify Amplifier Linearity: Is there a definition of linearity? Post by Dave OB on Aug 24th, 2009, 2:54am I'm trying to quantify the linearity of Gain for an amplifier design and compare it against another. I'm currently calculating the maximum deviation of the output from linear as a percentage of the maximum output voltage swing. Does this sound reasonable? Or is there an better definition for this value. Thanks all Dave. |
Title: Re: Quantify Amplifier Linearity: Is there a definition of linearity? Post by raja.cedt on Aug 24th, 2009, 5:11am refer any RF book ..you will see terms like IIP,1-dB comression point.... Thanks, rajasekhar |
Title: Re: Quantify Amplifier Linearity: Is there a definition of linearity? Post by Dave OB on Aug 24th, 2009, 7:56am Thanks. |
Title: Re: Quantify Amplifier Linearity: Is there a definition of linearity? Post by sos on Aug 26th, 2009, 1:17pm Dave OB wrote on Aug 24th, 2009, 2:54am:
Some context would help in making a useful reply. There are loads of ways to measure linearity, depending on what you're interested in. If your signals are large, your description makes sense. If you have a small signal that moves around to different dc levels, you might want an entirely different definition. Steve |
Title: Re: Quantify Amplifier Linearity: Is there a definition of linearity? Post by Sumit Adhikari on Aug 28th, 2009, 12:14am Do a FFT on your output. See at what level down your harmonics are. Regards, Sumit |
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