Title :
A widebound low phase noise LC-VCO based PLL with automatic amplitude control
Author :
Sohrabi, Ahmad Amini ; Ehsanian, Mehdi
Author_Institution :
Res. Lab. for High Freq. Circuits & Syst., K.N. Toosi Univ. of Technol., Tehran, Iran
Abstract :
This paper forcuese on a low phase noise LC-VCO based PLL using CP-AAC circuit for output amplitude control. A wide tuning range (2.796GHz-3.86GHz) is achieved by dividing the total tuning range into 8 sections. As it is needed a digital unit is designed to choose the correct suband. To compensate the KVCO degradation over entire frequency range which cause instability, charge pump current is increased on the opposite direction. Total rms jitter is about 1.5ps. This PLL architecture has been simulated in standard of 0.18μm CMOS technology with 1.8V power supply.
Keywords :
CMOS analogue integrated circuits; LC circuits; MMIC oscillators; UHF integrated circuits; UHF oscillators; charge pump circuits; circuit tuning; integrated circuit design; integrated circuit noise; jitter; phase locked loops; phase noise; voltage-controlled oscillators; CMOS technology; CP-AAC circuit; PLL; automatic amplitude control; charge pump current; frequency 2.796 GHz to 3.861 GHz; rms jitter; size 0.18 mum; voltage 1.8 V; wideband low phase noise LC-VCO; Charge pumps; Phase locked loops; Phase noise; Tuning; Voltage-controlled oscillators; CP-AAC; KVCO; PLL; VCO; jitter; phase-noise;
Conference_Titel :
Microelectronics (ICM), 2014 26th International Conference on
DOI :
10.1109/ICM.2014.7071802
