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https://designers-guide.org/forum/YaBB.pl Design >> Analog Design >> Pseudo differential amplifiers https://designers-guide.org/forum/YaBB.pl?num=1152069738 Message started by mohanps on Jul 4th, 2006, 8:22pm |
Title: Pseudo differential amplifiers Post by mohanps on Jul 4th, 2006, 8:22pm Are pseudo differential amplifiers supposed to burn lesser power compared to fully differential ones with similar requirements for slew rate, output swing and BW? Are there any good references discussing actual implementation of pseudo differential amplifiers Thanks Mohan |
Title: Re: Pseudo differential amplifiers Post by Sid on Jul 15th, 2006, 6:15pm Hi, A psedo differential amp basically does not have a bottom current source. Is this correct? If I am correct, then it should not really affect your gain-BW-power trade-off. It will affect only your output swing and CMRR. If you have some kind of fast settling CMFB (common-mode feedback), then I think you can have "reasonable" CMRR and get away without problems in your pseudo differential amplifier. Hope this helps. -Sid |
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