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Results tagged with amplifier
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user 142139
An amplifier can be used to adapt the range of a signal to a requirement, to make it more robust for transmission, or to satisfy interface requirements (like input/output impedance).
1
vote
3
answers
3k
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Meaning of dB while dealing with amplifier(Op-Amp)
I have found a question in MIT open-course material.The question is to
Design an amplifier(Op-Amp) with a gain of 20dB
While searching about db in the Internet I have found out that 20db is defined … approaches as follows:
From the definition of dB we have: 20dB = 20log(Vout/Vin)
But, from my above searching it should be
20dB = 10log(Vout/Vin)
Moreover the questioner of this question says that db in amplifier …
- 187
2
votes
2
answers
398
views
Relation between Output voltage and current in a transresistance amplifier
I need to show that for the above current to voltage converter,
\$\frac{V_0}{i_s} = -R_1(1+\frac{R_3}{R_1}+\frac{R_3}{R_2})\$
assuming that the op-amp is ideal,
Voltage at the negative input …
- 187