Title :
3.3GHz DCO with a frequency resolution of 150Hz for All-digital PLL
Author :
Fanori, Luca ; Liscidini, Antonio ; Castello, Rinaldo
Author_Institution :
Univ. of Pavia, Pavia, Italy
Abstract :
A 3.3 GHz DCO that achieves a minimum frequency quantization step of 150 Hz without any dithering is presented. The fine digital tuning is obtained through a capacitive degeneration of a portion of the transistor switching pair used in a classical LC-tank oscillator. The DCO exhibits a phase noise of -127.5 dBc/Hz@1 MHz drawing 16 mA from a 1.8 V supply, resulting in an FoM of 183 dBc/Hz. The active area is 700 ¿m × 450 ¿m.
Keywords :
oscillators; phase locked loops; DCO; LC-tank oscillator; all-digital PLL; capacitive degeneration; current 16 mA; digital tuning; digitally controlled oscillator; frequency 150 Hz; frequency 3.3 GHz; frequency resolution; phase locked loops; transistor switching pair; voltage 1.8 V; Frequency; GSM; Oscillators; Phase locked loops; Phase noise; Quantization; Transconductance; Tuning; Varactors; Voltage;
Conference_Titel :
Solid-State Circuits Conference Digest of Technical Papers (ISSCC), 2010 IEEE International
Conference_Location :
San Francisco, CA
Print_ISBN :
978-1-4244-6033-5
DOI :
10.1109/ISSCC.2010.5434057
