Design Considerations of Class D Amplifier Suitable Hearing Aid Devices

This paper describes the design of a class D amplifier for hearing aid devices using PWM modulation technique. The new topology used to overcome offset problems promotes low power consumption and low harmonic distortion. The amplifier presents an efficiency of 93% with just 1.9% of THD, indicating a...

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Bibliographic Details
Published in:	Electronics, Robotics and Automotive Mechanics Conference (CERMA 2007) pp. 669 - 674
Main Authors:	Ruiz, D.N., Moreno, R.L., Pimenta, T.C.
Format:	Conference Proceeding
Language:	English
Published:	IEEE 01-09-2007
Subjects:	Auditory system Gain control Low pass filters Operational amplifiers Power amplifiers Power harmonic filters Pulse width modulation Pulse width modulation inverters Switches Topology
Online Access:	Get full text
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Summary:	This paper describes the design of a class D amplifier for hearing aid devices using PWM modulation technique. The new topology used to overcome offset problems promotes low power consumption and low harmonic distortion. The amplifier presents an efficiency of 93% with just 1.9% of THD, indicating a good compromise between efficiency and linearity.
ISBN:	9780769529745 0769529747
DOI:	10.1109/CERMA.2007.4367764