Title :
Low-power Q-enhancement for parallel LC tanks
Author :
Townsend, Kenneth A. ; Haslett, James W.
Author_Institution :
TRLabs & Schulich Sch. of Eng., Calgary Univ., Alta.
Abstract :
A Q-enhancement technique based on active compensation of monolithic inductors for parallel resonant LC tanks is presented. Narrowband Q-enhancement is achieved using a gyrator to produce a negative inductance and negative resistance. The circuit is optimized for low-power operation and allows DC voltage control of Q-enhancement. A simulated two-stage capacitively-coupled Butterworth filter in 0.18mum CMOS consumes 1.9mW for a center frequency of 2.45GHz and a 100MHz bandwidth. The filter figure-of-merit is 135dBHz/mW
Keywords :
Butterworth filters; CMOS integrated circuits; MMIC; Q-factor; UHF filters; circuit optimisation; inductors; low-power electronics; 0.18 micron; 1.9 mW; 100 MHz; 2.45 GHz; Butterworth filter; CMOS; Q-enhancement; circuit optimization; gyrator; monolithic inductors; negative inductance; negative resistance; parallel resonant LC tanks; voltage control; Active inductors; Bandwidth; Circuit simulation; Filters; Frequency; Gyrators; Inductance; Narrowband; Resonance; Voltage control;
Conference_Titel :
Circuits and Systems, 2006. ISCAS 2006. Proceedings. 2006 IEEE International Symposium on
Conference_Location :
Island of Kos
Print_ISBN :
0-7803-9389-9
DOI :
10.1109/ISCAS.2006.1693442
