
SEMICONDUCTOR INTEGRATED CIRCUITS
Abstract: This paper presents a 5th-order Chebyshev-I active RC complex filter for multi-mode multi-band global navigation satellite systems (GNSS) RF receivers. An improved passive compensation technique is used to cancel the excess phase lag of the integrators, thus ensuring the in-band flatness of the frequency response over various ambient conditions. The filter has a programmable gain from 0 to 42 dB with a 6 dB step, a tunable center frequency at either 6.4 MHz or 16 MHz, and a bandwidth from 2 to 20 MHz with less than 3% frequency uncertainty. Implemented in a 0.18 μm CMOS process, the whole filter consumes 7.8 mA from a 1.8 V supply voltage and occupies a die area of 0.4 mm2.
Key words: complex filter
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Received: 20 August 2015 Revised: 03 July 2012 Online: Published: 01 December 2012
Citation: |
Fan Chaojie, Mo Tingting, Chen Dongpo, Zhou Jianjun. A reconfigurable complex band-pass filter with improved passive compensation[J]. Journal of Semiconductors, 2012, 33(12): 125004. doi: 10.1088/1674-4926/33/12/125004
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Fan C J, Mo T T, Chen D P, Zhou J J. A reconfigurable complex band-pass filter with improved passive compensation[J]. J. Semicond., 2012, 33(12): 125004. doi: 10.1088/1674-4926/33/12/125004.
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