eng Ansari Education and Research Society Journal of Ultra Scientist of Physical Sciences August 2010 22 2 381 386 jusps-A 982 article S. Sekar (sekar-nitt@rediffmail.com) 1 G. Balaji 2 Department of mathematics A.V.C., College, (Autonomous) Mannapandal, Mayiladuthurai - 609 305 Tamil Nadu (INDIA) Department of mathematics J.K.K. Nataraja College of Engineering & Technology, Komarapalayam - 638 183 Tamil Nadu (INDIA) <p style="text-align: justify;">This paper presents a study on RLC smoothing circuits using single-term Haar Wavelet series (STHW) technique and fourth order Runge-Kutta method (RK). The solution is obtained both in exact and discrete form. The results are compared with the results obtained by Palanisamy <em>et al.</em>⁴. Here, it is suggested that when the output of a digital to analogue converter is a staircase function, one has to introduce the initial condition at every subinterval for the given range to achieve accurate results.</p> <p>&nbsp;</p> https://www.ultrascientist.org/paper/982/ Runge-Kutta methods state-space equation Haar Wavelets single-term Haar Wavelet series