A novel design methodology for current reference circuits

In this paper, design parameters of a current reference circuit are automatically generated according to specific design constraints. These constraints can be minimal consumption current or minimal temperature coefficients. This methodology is based on a current reference mathematical model. This model is generated thanks to a dasiaDesign Of Experimentpsila (DOE) technique. The DOE technique takes as input electrical simulation results of a current reference circuit for different component geometries. DOE generates polynomial equations of the current reference output I_REF, the consumption current I_SUNK, the temperature dependency factor beta_T and the supply voltage dependency factor beta_V. Using these equations and according to a given design specification (I_REF, I_SUNK, beta_T or beta_V), the most suitable design parameter values are generated.