1. Kuang XF, Wu NJ (2006) A fast-settling PLL frequency synthesizer with direct frequency presetting. In: IEEE international solid-state circuits conference 2006, ISSCC 2006. Digest of Technical Papers 2006, 741–750
2. Shin S, Lee K, Kang SM (2006) 4.2 W CMOS frequency synthesizer for 2.4 GHz ZigBee application with fast settling time performance. In: IEEE MTT-S international microwave symposium digest 2006, pp 411–414
3. Yu G, Yu W, Huazhong Y, Hui W (2009) A fast-locking all-digital phase-locked loop with a novel counter-based mode switching controller. TENCON 2009–2009 IEEE region 10 conference, 23–26 January 2009, pp 1–5. doi:
10.1109/TENCON.2009.5396168
4. Yun S-J, Kim K-D, Kwon J-K (2012) A low-spur CMOS PLL using differential compensation scheme. ETRI J 34(4):518–526
5. Liao T-W, Su J-R, Hung C-C (2013) Ring-VCO based low noise and low spur frequency synthesizer. IEEE, pp 1861–1864