An amplifier has a gain of 46dB. Determines its amplification

 

Hello,

Decibels is a relative value.
Have a look at some of the links from this page:
http://educypedia.karadimov.info/electronics/decibels.htm

Bertus

 

Amplifier gain in dB has nothing in particular to do with op amps.
It could be any kind of amplifier.

 

An amplifier has a gain of 46dB. Determines its amplification

An amplifier with a gain of 46dB has an amplification of exactly 46dB.

 

An amplifier has a gain of 46dB. Determines its amplification

Start with the definition of a decibel and take a shot from there.

 

46 dB=10*log(Gain)
Solve for Gain.

 

46 dB=10*log(Gain)
Solve for Gain.

That's for power gain.
Amplifier gain (unless it's an RF power amp) is usually given as voltage gain or Av(dB) = 20*log(Gain) where Gain = Vout/Vin