Amplifiers serve a number of purposes from allowing us to hear beautiful music to accurately positioning elements of complicated systems using control technologies. Oscillators are found in a number of applications from the watch on your wrist to the transmitter and receiver in your cell phone. We look at audio-frequency amplifiers and oscillators and radio-frequency amplifiers and oscillators.

The most versatile amplifier has to be the operational amplifier (op amp). The key to its success is that it is perhaps the most ideal device in analog electronics. Because of this it is found in a number of amplifier designs.

High-power amplifiers are necessary where significant amounts of power need to be used to accomplish activities such as radio and television broadcasts. Just imagine what a rock concert might sound like without power amplifiers. Microwave amplifiers and oscillators represent a special part of the high-power amplifier and oscillator field. C.A.

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