\documentclass{scrartcl}
\usepackage{color}
\usepackage{multicol}
\usepackage[final]{graphicx}
\usepackage{pst-plot,pstricks}
	\input{pstplot-logarithmic-axes}
\begin{document}
	\psset{xunit=7cm,yunit=3cm}
	\begin{pspicture}(-1.1,-0.5)(1.1,1.5)
		\psaxes[Dx=10,Dy=1]{->}(0,0)(-1.1,-0.2)(1.1,1.5)
		\psframe(-0.1,0)(0.1,1)
		\psplot[plotstyle=curve]{-1.1}{0}{x -1 mul x x mul 1 add sqrt div}
		\psplot[plotstyle=curve]{0}{1.1}{x x x mul 1 add sqrt div}
		\rput(-0.1,-0.1){$-\omega_g$}
		\rput(0.1,-0.1){$\omega_g$}
		\rput(-1,-0.1){$-\omega_0$}
		\rput(1,-0.1){$\omega_0$}
		\rput(1,0.1){$\omega$}
		\rput[r](-0.1,1.3){$\left|\underline{H}_{TP}\left(j\omega\right)\right|$}
	\end{pspicture}
\end{document}
