Semiconductor Devices: Bridged Amplifier

One method of achieving higher load power is to create a bridged configuration. Instead of driving one end of the load with the other end tied to ground, a bridged amplifier drives both ends of the load in anti-phase. This can result in up to four times the load power but requires twice the circuitry.
References: Semiconductor Devices: Theory and Application/2E; Chapter 9, sections 2 and 3.
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[@DimasFajar-ns4vb]

android smartphone is amazing good job sir

[@brewman467]

Thanks for the Video. Regarding the load: if you had 2 x 50R in series, would you measure permanent GND between the two 50R resistors?

[@ElectronicswithProfessorFiore]

Yes. That's one way of visualizing the operation: each half drives half of the load in normal (single ended) fashion. Of course, in the real world you can't split a load like that, but you can imagine the voltages on each side swinging up and down, opposite of each other, like a see-saw on a playground. And right in the middle, is the stationary fulcrum (ground).

[@paulb4661]

Professor, I know this topology makes for a closer to ideal power amp, but I struggle to understand where does the apparent even harmonics attenuation/elimination stem from? Perhaps you could shed some light on this aspect? Otherwise, thank you for this episode!

[@ElectronicswithProfessorFiore]

In general, even harmonic distortion occurs when the waveform is treated asymmetrically around zero. If a waveform doesn't have halfwave symmetry, then it must contain at least one even harmonic. This is explained in more detail in my free text (follow links in description).