If you didn’t know better, you might think the phrase “class A amplifier” was a marketing term to help sell amplifiers. But it is, of course, actually a technical description of a… ...

As we’ve followed a trail through Hi-Fi and audio systems from the listener’s ear towards the music source, we’ve reached the amplifier. In our previous article we gave a first in… ...

Class D amplifiers put out a pulse-width-modulated (PWM) square wave, which is the sum of the switching waveform and the amplified input audio signal. The human ear acts as a bandpass filter so that ...

On the negative half of the cycle, transistors 4 and 2 turn on, forming the negative half of the waveform at the output of the transformer. These two halves complete the full RF waveform. Because of ...

Class A amplifiers A class a amplifier has very low efficiecy but it has almost no crossover distortion. Class A final amplifier is the simplest configuration and also one of the best configuration ...

1. The block diagram shows how three low-power audio amplifiers (LM386) are configured to implement a triple-waveform generator at one of two selectable frequencies.

Response of the amplifier extended from dc to over 15 kc, with average audio power about 2 w. The improved version of the amplifier, shown in the circuit diagram, delivers about 10-w average audio ...