Bluetooth Based Synthesizer for Wireless Sensor Measurements
In this paper, the authors aim to overcome the spur problems in Bluetooth-based wireless sensors measurement a compact fractional-N frequency synthesizer is presented ranging from 2 GHz to 3 GHz in frequency. Through this technique, the phase noise in the final spectrum is improved and spur tones in the output are deleted. Simple M-bit dither generator (linear feedback shift register) is deployed in an effective way to eliminate spur tones from fractional modulation. To validate the presented fractional-N frequency synthesizer with 26 MHz reference frequency, they utilize TSMC 0.18 um technology in ADS (Advanced Design System).