ABSTRACT
Bluetooth is a low-power wireless technology for short-range personal connectivity. The basic requirements for the Bluetooth synthesizer are set by the radio requirements imposed by regulatory bodies and the Bluetooth radio requirements that should guarantee good interoperability between different units. This chapter focuses on the derivation of the synthesizer requirements and demonstrates that its phase noise requirements are closely related to the performance of the transmitter. It describes the zero- intermediate frequency architecture and its associated frequency-generation system. The chapter discusses an important test specification with respect to the synthesizer requirements. Besides the residual frequency modulation (FM) requirements for the synthesizer, all the blocks of the synthesizer are briefly described regarding their basic requirements. The residual FM and phase noise simulation results indicate that with the choices made, it seems feasible to meet the synthesizer requirements. In addition, the ripple in the momentary frequency, induced by imperfections in the transmitter chain, is derived.
