Two amplifiers are connected one after the other in series (cascaded). The first amplifier has a voltage gain of 10 and the second has a voltage gain of 20 . If the input signal is 0.01 V , calcualte the output AC signal .

Explanation

When the amplifiers are Connected in series. The net voltage gain is equal to the product of the gains of the individual amplifiers.
`:. Av = Av^(1) xx Av^(11)`, hear `Av^(1) = 10` , and `Av^(11) = 20`
also `Av = (V_("output"))/(V_("input"))`
`:.` we can write
`(V_("output"))/(V_("input")) = Av^(1) xx av^(11) : V_(i n) = 0.01 V`
`V_(out) = V_(i n) xx Av^(1) xx Av^(11) = 0.01 xx 10 xx 20 = 2V`.