3.3 GHz DCO with a frequency resolution of 150Hz for All-digital PLL
L Fanori, A Liscidini, R Castello - 2010 IEEE International Solid …, 2010 - ieeexplore.ieee.org
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.
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.
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