Title :
Design of high-Q varactors for low-power wireless applications using a standard CMOS process
Author :
Porret, A.-S. ; Melly, T. ; Enz, C.C.
Author_Institution :
Electron. Lab., Swiss Fed. Inst. of Technol., Lausanne, Switzerland
Abstract :
The power consumption of an LC-tank oscillator is strongly affected by the varactor quality factor, whether the inductor is on- or off-chip. This paper proposes a new solution to realize high-Q, highly tunable on-chip varactors in a standard CMOS process, achieving a quality factor higher than 100 at 1 GHz, for a tuning ratio of 2. Other solutions are described and their respective advantages compared, while their characteristics are measured for a 0.5 μm process
Keywords :
CMOS analogue integrated circuits; Q-factor; UHF integrated circuits; circuit tuning; low-power electronics; mobile radio; transceivers; varactors; 0.5 micron; 1 GHz; LC-tank oscillator; high-Q varactors; low-power wireless applications; power consumption; quality factor; standard CMOS process; tunable on-chip varactors; tuning ratio; CMOS process; CMOS technology; Capacitance; Energy consumption; Frequency; Inductors; Oscillators; Q factor; Tuning; Varactors;
Conference_Titel :
Custom Integrated Circuits, 1999. Proceedings of the IEEE 1999
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-5443-5
DOI :
10.1109/CICC.1999.777362
