Title :
Low phase noise LC VCO with self-bias tail
Author :
Junyu Shi ; Kui Zhang ; Shengxu Wang ; Xin Lv
Author_Institution :
Sch. of Inf. & Electron., Beijing Inst. of Technol., Beijing, China
Abstract :
This paper presents a low phase noise LC VCO. The VCO adopts a switched current topology. Theoretical analysis is given to show how phase noise is optimized. The reduction of current tail´s 1/f noise and the elimination of fixed current bias voltage are the two main contributions to phase noise reduction. A 1.8-2.25 GHz VCO is implemented and measured for the proposed circuits, achieving phase noise at 1-MHz offset from a 2.01-GHz carrier of -125 dBc/Hz with a 2-V supply.
Keywords :
1/f noise; LC circuits; UHF oscillators; circuit noise; phase noise; voltage-controlled oscillators; 1/f noise; fixed current bias voltage elimination; frequency 1.8 GHz to 2.25 GHz; low phase noise LC VCO; self-bias tail; switched current topology; voltage 2 V; 1f noise; Phase noise; Topology; Transistors; Voltage-controlled oscillators; LC VCO; low phase noise; self-bias;
Conference_Titel :
Communication Problem-Solving (ICCP), 2014 IEEE International Conference on
Print_ISBN :
978-1-4799-4246-6
DOI :
10.1109/ICCPS.2014.7062346
