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Realization of narrow-band SC-filters with low power consumption

: Korotkov, A.S.; Hauer, H.; Ponomarev, S.A.; Morozov, D.V.


IEEE Circuits and Systems Society:
4th European Conference on Circuits and Systems for Communications, ECCSC 2008 : 10 - 11 July 2008, Bucharest
Piscataway: IEEE, 2008
ISBN: 978-1-424-42420-7
ISBN: 978-1-4244-2419-1 (print)
European Conference on Circuits and Systems for Communications (ECCSC) <4, 2008, Bucharest>
Conference Paper
Fraunhofer IIS ()

Synthesis of a narrow band switched-capacitor (SC) filter is discussed. Design is based on element simulation method when inductors of the filter prototype have been realized by 4-phase controlled single OpA SC-imitator that gives a possibility to decrease power consumption of the device. A six order Chebyshev type bandpass SC-filter with a middle frequency 1980 Hz and a frequency band 200 Hz has been synthesized and practically implemented in 0.35 um CMOS process. The input referred RMS noise is 140 uV while HD2 and HD3 are -45, -53 dB consequently when the input signal amplitude is equal to about 90 mV. The total current consumption of the filter is 420 uA with 3.3 V voltage supply. The active area of the filter is 800 um x 500 um.