A 106dB PSRR direct battery connected reconfigurable class-AB/D speaker amplifier for hands-free/receiver 2-in-1 loudspeaker

A reconfigurable class-AB/D audio power amplifier for use with hands-free/receiver 2-in-1 loudspeaker is designed under direct battery connection for portable device application. With an on-chip battery voltage tracking common-mode reference generator (BAVTCMR) and pseudo-differential topology, 106...

Full description

Saved in:
Bibliographic Details
Main Authors: Kuo-Hsin Chen, Yen Shun Hsu
Format: Conference Proceeding
Language:English
Subjects:
Batteries
Loudspeakers
Power amplifiers
Receivers
Resistors
Signal to noise ratio
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A reconfigurable class-AB/D audio power amplifier for use with hands-free/receiver 2-in-1 loudspeaker is designed under direct battery connection for portable device application. With an on-chip battery voltage tracking common-mode reference generator (BAVTCMR) and pseudo-differential topology, 106 dB power supply rejection ratio (PSRR) can be achieved. This high PSRR attenuates the leak of power supply noise to the amplifier output and 100dB SNR can be achieved under maximum power GSM radio link. Reconfiguration is realized by integrator gain stage sharing and capacitor reuse technique to minimize hardware redundancy and simplify the design complexity. In a 0.153-μm CMOS technology, 76/74 dB THD can be achieved for class-AB and class-D, respectively. The active area of class-AB/D amplifier is 0.5mm 2 .
DOI:10.1109/ASSCC.2011.6123642