EDN

Class D Amplifier FAQ – Part 2: Zobel Circuits, Testing, PCB Layout & Grounding

A Zobel is an impedance matching circuit often used with loudspeakers. A Zobel circuit is also known as a Boucherot cell or somewhat incorrectly as an RC snubber. The nominal impedance of a ...
EDN

Active-filter circuit and oscilloscope inspect a Class D amplifier’s output

The increasing acceptance of Class D amplifiers has helped them gain market share from their linear Class AB brethren. That acceptance is no surprise; the advantages of Class D amplifiers are legion, ...
What Hi-Fi?

Class A, Class A/B and Class D amplification: what does it mean for amplifiers?

If you have read an amplifier review or looked at the specifications for an amp, the chances are that you have come across a term such as 'Class A/B'. In fact, this is just one of a number of ...
Electronic Design

Synchronous Bus Converter Supplying Class D Amplifier Virtually Eliminates Bus Pumping

Class D amplifiers have increased their penetration in the audio world as a result of their efficiency, size, and solution cost advantages. Moreover, with “green” initiatives now in place, the 30% to ...
Electronic Design

Why is Quiescent Current So Important in Class D Amps?

The benefits of using Class D amplifiers. What to look for when choosing a Class D amp. Making the tradeoff between THD+N and quiescent current. Back in the day (1970s), audio amplifiers like the ...