Question
Design an amplifier with a gain range from $-10 \mathrm{~dB}$ to $+20 \mathrm{~dB}$, with an input impedance of at least $10 \mathrm{k} \Omega$.
Step 1
Choose the amplifier type: Since we need a variable gain range from negative to positive values, we should choose an inverting amplifier configuration using an operational amplifier (op-amp). Show more…
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