A Program Procedure for Estimation of the Cross-Coupled Charge Pump Properties

摘要

This paper presents the computional algorithm that is used for prediction of the cross-coupled charge pump static and dynamic properties. The calculation method is based on the state-space model of the charge pump for each phase of the clock signal. State equations are drawn from the symbolic relationships of the pump stage as an analog functional block using BSIM equations for long channel MOSFET. The algorithm was programmed in Maple SW and calculated values were compared with transistor-level circuit characteristics. The analysis results show high accuracy of the mentioned method, which allow to reflect many real effects compared to the equivalent digital model description. The algorithm will be used for synthesis procedure together with the application of formulae for optimal design circuit without long-time simulation process.