Title :
An 8Ω, 1.75W, 95% efficiency, 0.004% THD+N Class-D amplifier with a feed-forward ADC and feedback filters
Author :
Xicheng Jiang ; Jungwoo Song ; Cheung, Darwin ; Minsheng Wang ; Arunachalam, Sasi Kumar
Author_Institution :
Broadcom Corp., Irvine, CA, USA
Abstract :
An integrated ultralow EMI Class-D amplifier with a feed-forward ADC and feedback filters is demonstrated in a 180 nm CMOS and wire-bonded package. Circuit and architecture techniques, which enables 1.75W into an 8 Ohm speaker, 105 dB dynamic range, 95% efficiency, 0.004% THD+N, and 15.4 dB margin beyond the EN55022 Class B standard, are discussed.
Keywords :
analogue-digital conversion; audio-frequency amplifiers; electromagnetic interference; filters; harmonic distortion; lead bonding; CMOS; THD+N class-D amplifier; architecture technique; circuit technique; efficiency 95 percent; feed-forward ADC; feedback filters; integrated ultralow EMI class-D amplifier; power 1.75 W; resistance 8 ohm; size 180 nm; wire-bonded package; Batteries; Dynamic range; Electromagnetic interference; Power amplifiers; Power generation; Pulse width modulation; Standards; ADC; Amplifier; Audio; Class-D; Dynamic Range; EMI; Efficiency; Feed-forward; Feedback; Filter; THD+N;
Conference_Titel :
Solid-State Circuits Conference (A-SSCC), 2013 IEEE Asian
Conference_Location :
Singapore
Print_ISBN :
978-1-4799-0277-4
DOI :
10.1109/ASSCC.2013.6691059
