CMOS Precision Gain op amp design

[Ankitsadat]

Hello,

I need help for design a PRECISION GAIN AMPLIFIER.

given specification:

gain must be independent of temperature and frequency it can be controlled only by the w/l ratios
gain = 2.00000, freque = in KHz


any one have any good idea regarding topology or any doc regarding this or any book or any link where I can gen sufficient information then please ...!

Help would be very very appreciable.

Thank you very much.

 

[crutschow]

No amplifier has gain completely independent of temperature and frequency. One can be made that is stable to a reasonable tolerance over a limited frequency and temperature range. So you need to determine the frequency range, temperature range, and gain stability value required before you can do the design.

 

[Ankitsadat]

crutschow Sir,

First of all Thank you very much for your very informative rply.

as you said I should have to measure temp and freq range for stable gain How can I do that ?

and I forgot to mention one thing in previous post that this AMPLIFIER is going to be use in ADC.

Sir, there is one patent "Patent US4841254 - CMOS precision gain amplifier"
in this they controlled the gain using Feed back device transistor size. Is it good for me to follow this design for this ?


Hopping for the best rply..!