A low-pass filter with automatic frequency tuning for a bluetooth receiver

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 c...

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Bibliographic Details
Main Authors: Pedro, M, Galán, J, Sánchez-Rodríguez, T, Muñoz, F, Carvajal, R G, López-Martin, A
Format: Conference Proceeding
Language:English
Subjects:
analog CMOS circuits
Bluetooth
Chebyshev approximation
direct-conversion receivers
frequency tuning
Gm-C filters
Impedance
linear transconductors
Receivers
Switches
Topology
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Description
Summary: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.
DOI:10.1109/ICECS.2010.5724549