A precise SystemC-AMS model for Charge Pump Phase Lock Loop with multiphase outputs

SystemC-AMS as an extension of SystemC provides the essential capability to describe a mix-signal heterogeneous system, so that a virtual-prototype model can be generated to help analyze a whole mix-signal system and further guide the circuit design. This paper presents an example of systemC-ams modeling for a 10 phase 500 MHz charge pump phase lock loop, including digital models like phase/frequency detector and clock N-divider, and analog models like charge pump, low pass filter and voltage controlled oscillator. In order to prove the model´s accuracy, the SPICE simulation result from the corresponding CMOS circuits based on the same structure of these models is used for comparison, and PLL systemC-AMS model is validated¹.