Title :
Overcurrent detection circuit for integrated class-D amplifiers
Author :
Cadete, Frederico ; Guilherme, David ; Guilherme, Jorge ; Horta, Nuno
Author_Institution :
Inst. Super. Tecnico, Lisbon, Portugal
Abstract :
This paper presents a new architecture for a overcurrent detection system, dedicated to fully integrated class-D audio amplifiers, that uses half the comparators than conventional architectures. A detailed implementation for a 1-W bridge-tied load (BTL) class-D amplifier, on a 0.18 μm CMOS technology is presented, showing a reduction of 28.8% in current consumption and 23.5% in silicon area, when compared to its equivalent conventional architecture.
Keywords :
CMOS analogue integrated circuits; audio-frequency amplifiers; comparators (circuits); low-power electronics; 1-W bridge-tied load class-D amplifier; CMOS technology; comparators; fully integrated class-D audio amplifiers; integrated class-D amplifiers; overcurrent detection circuit; overcurrent detection system; size 0.18 mum; Clocks; Delay; Modulation; Multiplexing; Threshold current; Threshold voltage; Transistors;
Conference_Titel :
Circuit Theory and Design (ECCTD), 2011 20th European Conference on
Conference_Location :
Linkoping
Print_ISBN :
978-1-4577-0617-2
Electronic_ISBN :
978-1-4577-0616-5
DOI :
10.1109/ECCTD.2011.6043371
