Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Yes ofcourse yous in inverting mode if the feed back resistor is less than the input resistor
Gain =-Rf/Ri
and you can add an other unity inver to get non-invering gain <1
Yes ofcourse you can use the amplifier as a attenutor(gain<1) but be carefull about stability. What most of the people used to do is they check the stability of apmifier in unity gain mode, that would be the worst case of stability in most of the cases where the gain is more than one , This may not be true in this case.
Dear friends;
I was sure thar i can use the op amp as attenuator.
But i am intersting that khow what is the specs for using op amp as the attenuator (1/20) for 10MHZ input?
Can i use AD844 or simular Op amp for this reason?
I will be happy if you can help me.
Bests.
At 10 Mhz opamp as attenuater is not aggod choice. you should use an other technique. although AD844 might give you some gain also if you want at 10Mhz
Ignore the replies about stability issues with NI amplifiers having a gain less than one.
In this case the stability will be determined by the noise gain (from non-inverting input to output) which will approach 1 (from above) as the inverting gain is decreased towards zero.
Because in most cases there will be no advantage in doing so. Remember that it is usually preferable to operate operational amplifiers in an inverting mode since distortion due to common-mode gain is minimised.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.