Question

if you had 3 ce amplifiers with the following gains $a_{v1} = 10$, $a_{v2} = 8$, $a_{v3} = 5$ and $v_s = 250$ mvrms. solve for the output voltage ($v_{out}$). round to the nearest two decimal places.

answer:

Explanation:

Step1: Find total gain

The total voltage gain \( A_{V_{total}} \) of cascaded amplifiers is the product of individual gains. So \( A_{V_{total}} = A_{V1} \times A_{V2} \times A_{V3} = 10\times8\times5 = 400 \).

Step2: Calculate output voltage

Output voltage \( V_{out} = V_s \times A_{V_{total}} \). Given \( V_s = 250 \) mVrms, convert to volts: \( 250 \) mV \( = 0.25 \) V. Then \( V_{out} = 0.25\times400 = 100.00 \) V.

Answer:

100.00 V