Abstract
A new approach is proposed to the design of high-order switched-capacitor LPFs of megahertz cutoff frequency for communications channel selection. It essentially uses current conveyors instead of op amps to achieve low power consumption. A fifth-order Chebyshev LPF with a 1-MHz cutoff frequency is thus synthesized and fabricated in a 0.35-μm CMOS technology. The LPF consumes less than 10 mW from a 3-V power supply and exhibits a third harmonic distortion better than −54 dB in response to a 1-V sinusoidal input at the cutoff frequency. The rms noise voltage is at most 1.9 mV in a 2-MHz bandwidth.
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Original Russian Text © A.S. Korotkov, D.V. Morozov, A.A. Tutyshkin, 2006, published in Mikroelektronika, 2006, Vol. 35, No. 6, pp. 471–480.
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Korotkov, A.S., Morozov, D.V. & Tutyshkin, A.A. Low-power CMOS switched-capacitor lowpass filter using current conveyors. Russ Microelectron 35, 405–413 (2006). https://doi.org/10.1134/S1063739706060096
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DOI: https://doi.org/10.1134/S1063739706060096