Electronics: I’m a junior in EE and in my electronics course, which has primaril

Question

Electronics: I’m a junior in EE and in my electronics course, which has primarily dealt with voltage regulation using transistors we use ac and dc in these circuits. We usually have a 9V dc source and an ac signal. What’s is the purpose of using an ac signal source? Electronics: I’m a junior in EE and in my electronics course, which has primarily dealt with voltage regulation using transistors we use ac and dc in these circuits. We usually have a 9V dc source and an ac signal. What’s is the purpose of using an ac signal source?

Explanation / Answer

In a voltage regulation circuit especially using transistors we don't employ ac signal and dc supply only variable dc is applied at the input of this circuit because main function of voltage regulator is to provide constant output voltage irrespective of the variations in supply voltage and load.

I personally think that you are misinterpreting voltage regulator with a small signal amplifier. In a small signal amplifier we provide dc supply to bias our transistor in active mode and then amplify our signal which primarily is an ac signal source.

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