Title :
A 10-MHz channel-select filter for a multicarrier WCDMA base-station
Author :
Saari, V. ; Ryynänen, J. ; Mustola, J. ; Halonen, K. ; Jussila, J.
Author_Institution :
Electron. Circuit Design Lab., Helsinki Univ. of Technol., Espoo
Abstract :
A channel-select filter for a multicarrier WCDMA receiver targeted for base-station applications is described in this paper. The 4th-order Chebyshev lowpass filter with a 0.1-dB passband ripple is designed to drive high-resolution A/D converters. The -3-dB frequency of the implemented filter is 10 MHz in order to receive two adjacent downconverted WCDMA channels. The filter is designed to have high in- and out-of-band dynamic ranges. It achieves +25-dBV in-band IIP3, +37-dBV out-of-band IIP3, and 11.2-nV/radicHz input-referred noise density. The circuit uses a 2.5-V supply and has been fabricated with a 0.25-mum SiGe BiCMOS process
Keywords :
BiCMOS integrated circuits; Chebyshev filters; Ge-Si alloys; analogue-digital conversion; code division multiple access; low-pass filters; radio receivers; spread spectrum communication; wireless channels; 0.25 micron; 10 MHz; 2.5 V; AD converters; BiCMOS process; Chebyshev filter; SiGe; WCDMA receiver; channel-select filter; downconverted WCDMA channels; lowpass filter; multicarrier WCDMA base-station; BiCMOS integrated circuits; Chebyshev approximation; Circuit noise; Dynamic range; Filters; Frequency; Germanium silicon alloys; Multiaccess communication; Passband; Silicon germanium;
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.2006.1692770
