Presented here is a PWM amplifier circuit (Figure 1) built around a two quadrant driver circuit that can amplify 3.3V or 5V signals to a higher level.Figure 1 PWM amplifier circuit built around a two ...

Figure 1 The addition of a simple diode in the emitter circuit yields the symmetric waveform in Figure 4.. Figure 2 This amplifier circuit produces the distorted waveform in Figure 3.. Diode D 1 ...