Title :
A phase noise minimization of CMOS VCOs over wide tuning range and large PVT variations
Author :
Miyashita, Daisuke ; Ishikuro, Hiroki ; Kousai, Shouhei ; Kobayashi, Hiroyuki ; Majima, Hideaki ; Agawa, Kenichi ; Hamada, Mototsugu
Author_Institution :
SoC R&D Center, Toshiba Corp., Kawasaki, Japan
Abstract :
An automatic amplitude control circuit to minimize the phase noise of a LC-VCO is proposed and implemented by a 0.18-μm CMOS process. The phase noise lower than -90dBc/Hz at 100kHz offset is achieved over a wide tuning range (from 2.2GHz to 2.8GHz) under large process (ΔVth = ±100mV), temperature (from ∼35°C to 85°C), and power supply (from 1.8V to 3V) variations.
Keywords :
CMOS integrated circuits; UHF oscillators; circuit noise; phase noise; voltage-controlled oscillators; 0.18 micron; 1.8 to 3 V; 100 kHz; 2.2 to 2.8 GHz; CMOS VCO; CMOS process; LC-VCO; PVT variations; automatic amplitude control circuit; phase noise minimization; Automatic control; CMOS process; Circuit optimization; Degradation; Integrated circuit yield; MOSFETs; Phase noise; Radio frequency; Transceivers; Voltage-controlled oscillators;
Conference_Titel :
Custom Integrated Circuits Conference, 2005. Proceedings of the IEEE 2005
Print_ISBN :
0-7803-9023-7
DOI :
10.1109/CICC.2005.1568735
