J. Semicond. > 2012, Volume 33 > Issue 12 > 125004

SEMICONDUCTOR INTEGRATED CIRCUITS

A reconfigurable complex band-pass filter with improved passive compensation

Fan Chaojie, Mo Tingting, Chen Dongpo and Zhou Jianjun

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DOI: 10.1088/1674-4926/33/12/125004

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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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    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
    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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    Received: 20 August 2015 Revised: 03 July 2012 Online: Published: 01 December 2012

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      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 ****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.
      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 ****
      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.

      A reconfigurable complex band-pass filter with improved passive compensation

      DOI: 10.1088/1674-4926/33/12/125004
      Funds:

      Chinese National Major Science and Technology Projects Program (No. 2009ZX01031-002-005)

      • Received Date: 2015-08-20
      • Accepted Date: 2012-04-05
      • Revised Date: 2012-07-03
      • Published Date: 2012-11-13

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