Class-D audio amplifiers produce electromagnetic interference (EMI), which often needs to be suppressed by an external LC filter. However, due to component nonlinearity, this filter can itself cause significant distortion. This article presents a class-D amplifier that suppresses LC filter nonlinearity by 49 dB and is robust to ±30% variations in its cutoff frequency. This is achieved by a dual-loop architecture, in which an inner loop provides stability, while an outer loop provides the high gain needed to suppress the LC filter and output-stage nonlinearity. A prototype, implemented in a 180-nm BCD process, achieves -121.5-dB total harmonic distortion (THD) and -107.1-dB THD+N, which is maintained to within 3 dB even as the LC filter cuto...
Abstract—Integrated class-D audio amplifiers are very power efficient but require an external LC rec...
High power efficiency, small size and reduced heat dissipation are highly desirable for both the low...
Class-D amplifiers (CDAs) are often used in audio applications due to their superior power efficienc...
Class-D audio amplifiers produce electromagnetic interference (EMI), which often needs to be suppres...
This paper reports a Class-D audio amplifier that uses multiloop feedback to suppress output LC filt...
This article presents a Class-D audio amplifier for automotive applications. Low electromagnetic int...
This paper describes a class-D audio amplifier with a multilevel output stage that reduces both EMI ...
Due to the lack of feedback networks, digital class D amplifiers operating in open loop typically ha...
Class D amplifiers are found in nearly all portable electronic products for their small size and pow...
This article presents a class-D amplifier (CDA) with high dynamic range (DR). To eliminate the typic...
This work presents a fully differential Class D audio amplifier using 2.1MHz pulse-width modulation ...
Integrated Class D audio amplifiers are very power efficient, but require an external filter which p...
Class-D amplifier is extensively acceptable in audio application due to its higher power-efficiency ...
Class D audio power amplifiers have become more prevalent in consumer electronics products because o...
Integrated class-D audio amplifiers are very power efficient but require an external LC reconstructi...
Abstract—Integrated class-D audio amplifiers are very power efficient but require an external LC rec...
High power efficiency, small size and reduced heat dissipation are highly desirable for both the low...
Class-D amplifiers (CDAs) are often used in audio applications due to their superior power efficienc...
Class-D audio amplifiers produce electromagnetic interference (EMI), which often needs to be suppres...
This paper reports a Class-D audio amplifier that uses multiloop feedback to suppress output LC filt...
This article presents a Class-D audio amplifier for automotive applications. Low electromagnetic int...
This paper describes a class-D audio amplifier with a multilevel output stage that reduces both EMI ...
Due to the lack of feedback networks, digital class D amplifiers operating in open loop typically ha...
Class D amplifiers are found in nearly all portable electronic products for their small size and pow...
This article presents a class-D amplifier (CDA) with high dynamic range (DR). To eliminate the typic...
This work presents a fully differential Class D audio amplifier using 2.1MHz pulse-width modulation ...
Integrated Class D audio amplifiers are very power efficient, but require an external filter which p...
Class-D amplifier is extensively acceptable in audio application due to its higher power-efficiency ...
Class D audio power amplifiers have become more prevalent in consumer electronics products because o...
Integrated class-D audio amplifiers are very power efficient but require an external LC reconstructi...
Abstract—Integrated class-D audio amplifiers are very power efficient but require an external LC rec...
High power efficiency, small size and reduced heat dissipation are highly desirable for both the low...
Class-D amplifiers (CDAs) are often used in audio applications due to their superior power efficienc...