Title :
A Low-Noise, Wide-BW 3.6GHz Digital ΔΣ Fractional-N Frequency Synthesizer with a Noise-Shaping Time-to-Digital Converter and Quantization Noise Cancellation
Author :
Hsu, Chun-Ming ; Straayer, Matthew Z. ; Perrott, Michael H.
Author_Institution :
Massachusetts Inst. of Technol., Cambridge, MA
Abstract :
A digital fractional-N frequency synthesizer is presented that leverages a noise-shaping time-to-digital converter (TDC) and a simple quantization noise cancellation technique to achieve low phase noise with a wide PLL bandwidth of 500kHz. In contrast to previous cancellation techniques, this structure requires no analog components and is straightforward to implement with standard-cell digital logic.
Keywords :
delta-sigma modulation; frequency synthesizers; interference suppression; phase noise; quantisation (signal); bandwidth 500 kHz; delta-sigma modulators; digital fractional-N frequency synthesizer; quantization noise cancellation; time-to-digital converter; 1f noise; Digital-to-frequency converters; Filters; Frequency synthesizers; Noise cancellation; Noise shaping; Phase locked loops; Quantization; Varactors; Voltage-controlled oscillators;
Conference_Titel :
Solid-State Circuits Conference, 2008. ISSCC 2008. Digest of Technical Papers. IEEE International
Conference_Location :
San Francisco, CA
Print_ISBN :
978-1-4244-2010-0
Electronic_ISBN :
978-1-4244-2011-7
DOI :
10.1109/ISSCC.2008.4523196
