SEMICONDUCTOR INTEGRATED CIRCUITS

An asymmetric MOSFET-C band-pass filter with on-chip charge pump auto-tuning

Chen Fangxiong, Lin Min, Ma Heping, Jia Hailong, Shi Yin and Dai Forster

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Abstract: An asymmetric MOSFET-C band-pass filter (BPF) with on chip charge pump auto-tuning is presented. It is implemented in UMC (United Manufacturing Corporation) 0.18 µm CMOS process technology. The filter system with auto-tuning uses a master-slave technique for continuous tuning in which the charge pump outputs 2.663 V, much higher than the power supply voltage, to improve the linearity of the filter. The main filter with third order lowpass and second order high-pass properties is an asymmetric band-pass filter with bandwidth of 2.730–5.340 MHz. The in-band third order harmonic input intercept point (IIP3) is 16.621 dBm, with 50 Ω as the source impedance. The input referred noise is about 47.455 µVrms. The main filter dissipates 3.528 mW while the auto-tuning system dissipates 2.412 mW from a 1.8 V power supply. The filter with the auto-tuning system occupies 0.592 mm2 and it can be utilized in GPS (global positioning system) and Bluetooth systems.

Key words: MOSFET-C filter auto tuning charge pump CMOS circuit design wireless system

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    Received: 18 August 2015 Revised: 24 March 2009 Online: Published: 01 August 2009

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      Chen Fangxiong, Lin Min, Ma Heping, Jia Hailong, Shi Yin, Dai Forster. An asymmetric MOSFET-C band-pass filter with on-chip charge pump auto-tuning[J]. Journal of Semiconductors, 2009, 30(8): 085005. doi: 10.1088/1674-4926/30/8/085005 Chen F X, Lin M, Ma H P, Jia H L, Shi Y, Dai F. An asymmetric MOSFET-C band-pass filter with on-chip charge pump auto-tuning[J]. J. Semicond., 2009, 30(8): 085005. doi:  10.1088/1674-4926/30/8/085005.Export: BibTex EndNote
      Citation:
      Chen Fangxiong, Lin Min, Ma Heping, Jia Hailong, Shi Yin, Dai Forster. An asymmetric MOSFET-C band-pass filter with on-chip charge pump auto-tuning[J]. Journal of Semiconductors, 2009, 30(8): 085005. doi: 10.1088/1674-4926/30/8/085005

      Chen F X, Lin M, Ma H P, Jia H L, Shi Y, Dai F. An asymmetric MOSFET-C band-pass filter with on-chip charge pump auto-tuning[J]. J. Semicond., 2009, 30(8): 085005. doi:  10.1088/1674-4926/30/8/085005.
      Export: BibTex EndNote

      An asymmetric MOSFET-C band-pass filter with on-chip charge pump auto-tuning

      doi: 10.1088/1674-4926/30/8/085005
      • Received Date: 2015-08-18
      • Accepted Date: 2009-01-18
      • Revised Date: 2009-03-24
      • Published Date: 2009-07-31

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