Journal of Applied Sciences1812-56541812-5662Asian Network for Scientific Information10.3923/jas.2014.1643.1647SusanD. JayalalithaS. 1220141414Class D audio power amplifiers are used to amplify the audio
signal as this amplifier has the main advantage of low power dissipation. It
makes use of the passive filter at the output stage to eliminate the high frequency
components present in the modulated output and to get back the amplified audio
signal. This passive filter makes use of inductors and capacitors. The size
of the inductor becomes exceedingly large due to more number of turns required
at audio frequencies. To eliminate the passive component namely the inductor
used in this filter, a new technique of replacing L by the simulated L, which
makes use of the active devices along with resistors and capacitors is proposed
in this study. It eliminates most of the disadvantages of passive filter and
gives an improved performance of the filter as well as faithful amplification
from class D amplifier. The simulation is done in PSPICE and results are presented.]]>Berkhout, M. and L. Dooper,2010579921002Chang, J.S., M.T. Tan, Z. Cheng and Y.C. Tong,200047897902Franco, S.,20072nd Edn.,Ge, T. and J.S. Chang,201044856Hmida, G.B., H. Ghariani and M. Samet,20076153164Himmelstoss, F.A. and K.H. Edelmoser,19991999pp: 116120Jeong, J.H., H.H. Seong, J.H. Yi and G.H. Cho,19951995pp: 428429Kumar, U., S.K. Shukla and Amiete,198913211227Liu, Y.H.,200753987994Messghati, Z., Y. Laghzizal and H. Qjidaa,20112011pp: 14Susan, D. and S. Jayalalitha,20102010pp: 659662Susan, D. and S. Jayalalitha,20103263269Susan, D. and S. Jayalalitha,20112011pp: 268271Susan, D. and S. Jayalalitha,2011351265131