Chapter 02aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

Chapter 02

1. 12/18/2022 Applied Collage, UOH 1

2. Topics Covered in Chapter 2-1: Gain, Attenuation, and Decibels 2-2: Tuned Circuits 2-3: Filters 2-4: Fourier Theory 12/18/2022 Applied Collage, UOH 2

3. 2-1: Gain, Attenuation, and Decibels Most circuits in electronic communication are used to manipulate signals to produce a desired result. All signal processing circuits involve: Gain Attenuation 12/18/2022 3

4. 2-1: Gain, Attenuation, and Decibels Gain  Gain means amplification. It is the ratio of a circuit’s output to its input. An amplifier has gain. 12/18/2022 4

5. 2-1: Gain, Attenuation, and Decibels Most amplifiers are also power amplifiers, so the same procedure can be used to calculate power gain AP where P in is the power input and Pout is the power output. Power gain ( Ap ) = P out / P in Example: The power output of an amplifier is 6 watts (W). The power gain is 80. What is the input power? Ap = Pout / Pin therefore Pin = Pout / Ap Pin = 6 / 80 = 0.075 W = 75 mW 12/18/2022 5