Title :
On-chip RF spiral inductors and bandpass filters using active magnetic energy recovery
Author :
Wu, Yi-Cheng ; Chang, M. Frank
Author_Institution :
Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA
Abstract :
We present designs to achieve monolithic integration of high-Q spiral inductors and bandpass filters (BPFs) in standard CMOS technology. The designed transformer-type inductor behaves like an ideal inductor due to the active magnetic feedback from the secondary coil for compensating energy loss in the primary coil. This approach is compatible with mainstream IC technologies and has potential to achieve high-Q reactance with low power, low noise and high linearity. The fabricated inductors exhibit Q∼3000 between 1.5 to 2.1 GHz. The fabricated BPF shows 3 dB bandwidth of 120 MHz at 1.75 GHz with 3.1 dB in-band gain and 30 dB out-of-band rejection below 1.2 GHZ.
Keywords :
CMOS integrated circuits; UHF filters; UHF integrated circuits; active filters; band-pass filters; circuit feedback; inductors; microwave filters; system-on-chip; 1.5 to 2.1 GHz; 120 MHz; 3.1 dB; 3dB bandwidth; 5.4 GHz; RF system-on-chip design; active magnetic energy recovery; active magnetic feedback; bandpass filters; high linearity; high-Q reactance; high-Q spiral inductors; ideal inductor; in-band gain; low noise; low power; on-chip RF spiral inductors; on-chip active filter; out-of-band rejection; primary coil energy loss compensation; secondary coil; standard CMOS technology; transformer-type inductor; Active inductors; Band pass filters; CMOS technology; Coils; Feedback; Integrated circuit noise; Magnetic separation; Monolithic integrated circuits; Radio frequency; Spirals;
Conference_Titel :
Custom Integrated Circuits Conference, 2002. Proceedings of the IEEE 2002
Print_ISBN :
0-7803-7250-6
DOI :
10.1109/CICC.2002.1012812
