Four structure types of two dimensional position sensitive detectors have been studied. There are the tetra-lateral PSD,the modified tetra-lateral PSD,the duo-lateral PSD and the resistance bordered PSD. The RC models of these four structure type PSDs have been developed and the linearity of them are emulated by the soft of the Multisim. The linearity position grid and the errors graphics show that the average error in the 40% centric sensitive area of the tetral-lateral PSD,the modified tetra-lateral PSD,the duo-lateral PSD and the resistance bordered are 10.05%,3.70%,0.29%and 0.12 % respectively. The result shows that the models can give a more exact analysis on different structure types of two dimensional position sensitive detectors than the analytic and numerical methods.