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

fYear

2014

Firstpage

44

Lastpage

47

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; K_VCO; PLL; VCO; jitter; phase-noise;

fLanguage

English

Publisher

ieee

Conference_Titel

Microelectronics (ICM), 2014 26th International Conference on

Type

conf

DOI

10.1109/ICM.2014.7071802

Filename

7071802