Title :
A low-pass filter with automatic frequency tuning for a bluetooth receiver
Author :
Pedro, M. ; Galán, J. ; Sánchez-Rodríguez, T. ; Munoz, F. ; Carvajal, R.G. ; López-Martín, A.
Author_Institution :
Dipt. Ing. Electron., de Sist. Informaticos y Autom., Univ. de Huelva, Huelva, Spain
Abstract :
A third-order Gm-C Chebyshev low-pass filter with high linearity and automatic frequency programmability has been designed. The filter is intended to be used as a channel-select filter for a zero-IF Bluetooth receiver. The frequency tuning scheme is simpler and has more relaxed specifications than conventional ones. The filter bandwidth is 0.5 MHz and the overall scheme dissipates 1.1 mA from a 1.8-V supply. The third-order intermodulation (IM3) distortion of the filter for a 1Vpp two-tone signal centered at 350 kHz is -67dB.
Keywords :
Bluetooth; Chebyshev filters; automatic frequency control; circuit tuning; intermodulation distortion; low-pass filters; radio receivers; Bluetooth receiver; automatic frequency programmability; automatic frequency tuning; bandwidth 0.5 MHz; channel-select filter; current 1.1 mA; third-order Gm-C Chebyshev low-pass filter; third-order intermodulation distortion; two-tone signal; voltage 1.8 V; zero-IF Bluetooth receiver; Bluetooth; Chebyshev approximation; Impedance; Receivers; Switches; Topology; Gm-C filters; analog CMOS circuits; direct-conversion receivers; frequency tuning; linear transconductors;
Conference_Titel :
Electronics, Circuits, and Systems (ICECS), 2010 17th IEEE International Conference on
Conference_Location :
Athens
Print_ISBN :
978-1-4244-8155-2
DOI :
10.1109/ICECS.2010.5724549
