Ihp Gmbh Innovations for High Performance Microelectronics/leibniz Institut for Innovative Mikroelektronik

Ihp Gmbh-innovations for High Performance Microelectronics/leibniz-institut Fur Innovative Mikroelektronik

Herman Jalli Ng

Dietmar Kissinger

Novel phase locked loop architectures that can overcome the limitation of the maximum operating frequency of the fractional-N phase-locked loop (PLL) for fast-chirp frequency modulated continuous wave (FMCW) radars are suggested. Several phase frequency detector and charge pumps (PFD&CPs) are put in parallel and are operated with reference signals that are generated by using a delay-locked loop (DLL) instead of further increasing the operating frequency of the PFD&CP. The proposed DLL supported parallel PLL architectures enable further speeding up the FMCW chirp as well as improving its linearity and the performance of Range Doppler Radars based on fast-chirp FMCW radar. Methods for operating the parallel fractional N phase locked loop are proposed.

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Frankfurt-am-Main, Germany

Herman Jalli Ng