A global position system (GPS) receiver for a host product is controlled by a microcontroller that also controls other functions in the host product. The GPS receiver includes an RF downconverter and a digital signal processor. The digital signal processor includes a correlator and an interface for asynchronously...http://www.google.com.au/patents/US6369753?utm_source=gb-gplus-sharePatent US6369753 - Host-independent monolithic integrated circuit for RF downconversion and digital signal processing of GPS signals
