Final Answer:
The overall voltage gain (vo/vs) for the cascade amplifier in Fig. 1.17 can be determined through the multiplication of individual stage gains. Assuming stage gains A1, A2, and A3, the overall voltage gain is given by vo/vs = A1 * A2 * A3.
Step-by-step explanation:
In a cascade amplifier, multiple amplifier stages are connected in series, each contributing to the overall voltage gain. The overall voltage gain (vo/vs) is obtained by multiplying the individual gains of each stage. Let's denote the gain of the first stage as A1, the gain of the second stage as A2, and the gain of the third stage as A3. The formula for the overall voltage gain is then expressed as vo/vs = A1 * A2 * A3.
In the cascade configuration, the output of each stage serves as the input for the next stage. This sequential arrangement allows for a cumulative amplification effect. To find the overall voltage gain, you simply multiply the gains of each stage. It's crucial to note that this assumes an ideal cascade amplifier without any losses or interactions between stages.
Mathematically, the multiplication of gains reflects the amplification achieved at each stage. If, for instance, A1 = 10, A2 = 5, and A3 = 8, then the overall voltage gain would be vo/vs = 10 * 5 * 8 = 400. Therefore, the overall voltage gain is a product of the gains of individual stages, demonstrating the combined amplification of the cascade amplifier.