Title :
A novel self-error correction pulse width modulator for a class D amplifier for hearing instruments
Author :
Tan, M.T. ; Chang, J.S. ; Cheng, Z.H. ; Tong, Y.C.
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore
Abstract :
In this paper, we propose a novel self-error correction pulse width modulator for a class D amplifier for hearing aid applications. The self-error correction mechanisms based on a master-slave architecture is realized by simple digital circuits and can be easily fabricated in a low cost digital CMOS process. The circuit consumes 24.6 μA from a 2.5 V supply. Measurements on the prototype IC shows that the error at zero-input 50% duty cycle is less than 2% and the total harmonic distortion is 3.3%
Keywords :
CMOS integrated circuits; biomedical electronics; error correction; harmonic distortion; hearing aids; mixed analogue-digital integrated circuits; modulators; power amplifiers; pulse width modulation; 1.2 micron; 2.5 V; 24.6 muA; CMOS process; PWM; THD; class D amplifier; digital circuits; hearing aid applications; master-slave architecture; pulse width modulator; self-error correction mechanism; total harmonic distortion; Auditory system; CMOS process; Costs; Digital circuits; Distortion measurement; Master-slave; Prototypes; Pulse amplifiers; Pulse width modulation; Space vector pulse width modulation;
Conference_Titel :
Circuits and Systems, 1998. ISCAS '98. Proceedings of the 1998 IEEE International Symposium on
Conference_Location :
Monterey, CA
Print_ISBN :
0-7803-4455-3
DOI :
10.1109/ISCAS.1998.704354
