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https://designers-guide.org/forum/YaBB.pl Design >> Analog Design >> High Linear differential amplifier https://designers-guide.org/forum/YaBB.pl?num=1369174393 Message started by raja.cedt on May 21st, 2013, 3:13pm |
Title: High Linear differential amplifier Post by raja.cedt on May 21st, 2013, 3:13pm Dear all, Can any one tell me what are the way's to high-linear amplifier, Since i am working at high frequency i can't use any opamp based global Feedback, now the only one option would be a local feedback. Is there any way to to implement local feedback apart from emitter degeneration. I have emitter degen (~200mv drop or gm*R=6), i can't increase beyond this but i have to get some more linearity. Any kind of suggestion are help full.. Thanks, raj. |
Title: Re: High Linear differential amplifier Post by RobG on May 28th, 2013, 10:48am I'm not sure what you are doing -- are you doing a bipolar open loop amplifier? You could look at Barry Gilbert's work in that area - things like translinear design. |
Title: Re: High Linear differential amplifier Post by Lex on Jun 3rd, 2013, 2:31am You could try gm linearization techniques to improve the linearity. Maybe harmonic cancellation techniques are interesting if you work at very high frequencies. If you're working on CMOS I guess translinear design is out of the picture. |
Title: Re: High Linear differential amplifier Post by raja.cedt on Jun 3rd, 2013, 5:22am Any reference for harmonic cancellation?? Any how thanks for the reply Thanks, Raj. |
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