Title :
Low cost implementation of filterless class D audio amplifier with constant switching frequency
Author :
Kim, Hyoung-Sik ; Jung, Sung-Wook ; Jung, Hwan-Mok ; Shin, Jang-Kyoo ; Choi, Pyung
Author_Institution :
Sch. of Electr. Eng. & Comput. Sci., Kyungpook Nat. Univ., Taegu
Abstract :
A new and simple configuration of filterless class D audio amplifier is proposed in this paper. The proposed filterless class D audio amplifier provides the advantages of both low total system cost and generation of synchronized 3-level pulse-width modulated (PWM) output. Moreover, as a result of hysteresis window variation, a close to constant switching frequency of PWM output is obtained. The proposed filterless class D audio amplifier is verified by the PSpice simulation and prototype circuit experiment
Keywords :
audio-frequency amplifiers; pulse width modulation; PSpice simulation; PWM output; constant switching frequency; filterless class D audio amplifier; pulse-width modulated output; Circuit simulation; Costs; Frequency synchronization; Hysteresis; Pulse amplifiers; Pulse generation; Pulse width modulation; Space vector pulse width modulation; Switching frequency; Virtual prototyping;
Journal_Title :
Consumer Electronics, IEEE Transactions on
DOI :
10.1109/TCE.2006.273168
