\documentclass{scrartcl}
\usepackage{color}
\usepackage{multicol}
\usepackage[final]{graphicx}
\usepackage{pst-plot,pstricks}
	\input{pstplot-logarithmic-axes}
\begin{document}
	\psset{xunit=2cm,yunit=2cm}
	\begin{pspicture}(-1.5,-0.5)(1.5,1.5)
		\psgrid[xunit=1,yunit=1,subgriddiv=0,griddots=5,gridlabels=0](-1,-0.5)(1,1)
		\psaxes[Dx=1,Dy=1]{->}(0,0)(-1.5,-0.5)(1.5,1.5)
		\psplot[plotstyle=curve]{-1.5}{1.5}{x abs}
		\rput[l](1.6,0){$\frac{\omega}{\omega_0}$}
		\rput[r](-0.2,1.5){$\left|\underline{H}\left(j\omega\right)\right|$}
	\end{pspicture}
\end{document}
