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A CMOS analog FIR filter with low phase distortion

  • Gang Xu
  • Jiren Yuan
Publiceringsår: 2002
Språk: Engelska
Sidor: 747-750
Publikation/Tidskrift/Serie: ESSCIRC 2002. Proceedings of the 28th European Solid-State Circuit Conference
Dokumenttyp: Konferensbidrag
Förlag: Univ. Bologna


The FIR function of the proposed filter is realized by integrating weighted signal currents in a given time window on a capacitor The input signal voltage is weighted into multiple voltages according to the FIR requirement through a resistor ladder. A switching network sequentially connects the weighted voltages to a linear transconductor which converts the voltage to current and charges the capacitor. The resulting capacitor voltage becomes the filter output, periodically available between integration and reset. In such a FIR filter the hardware cost is de-linked from the number of taps. The filter was implemented in a 0.35 μm CMOS process. The measured side-band attenuation reaches 60 dB while the group delay is smaller than 11 ns, with a power consumption of about 35 mW at 3.3 V


  • Electrical Engineering, Electronic Engineering, Information Engineering
  • FIR function
  • low phase distortion
  • CMOS analog FIR filter
  • linear transconductor
  • finite impulse response filters
  • weighted voltages
  • 0.35 micron
  • 11 ns
  • 3.3 V
  • 35 mW
  • resistor ladder
  • switching network
  • weighted signal currents integration


ESSCIRC 2002. Proceedings of the 28th European Solid-State Circuit Conference
  • ISBN: 88-900847-9-0

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