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Low distortion active filters using the Gm-assisted OTA-RC technique
, Siva V Thyagarajan, Prabu Sankar
Published in Institute of Electrical and Electronics Engineers Inc.
2010
Pages: 162 - 165
Abstract
The linearity of conventional active-RC filters is limited by the operational transconductance amplifiers (OTAs) used in the integrators. We propose the Gm-assisted OTA-RC technique, which is a way of combining Gm-C and active-RC integrators in a manner that enhances the linearity and speed of the latter, while adding negligible extra noise or power dissipation. Measurements from a fifth order Chebyshev filter with 20MHz bandwidth designed in a 0.18μm CMOS process show a 30 dB reduction in intermodulation distortion when Gm-assistance is added to an active-RC filter. ©2010 IEEE.
About the journal
JournalData powered by TypesetESSCIRC 2010 - 36th European Solid State Circuits Conference
PublisherData powered by TypesetInstitute of Electrical and Electronics Engineers Inc.
Open AccessNo
Concepts (11)
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    ACTIVE RC FILTER
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    ACTIVE-RC
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    CHEBYSHEV FILTER
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    Cmos processs
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    LOW DISTORTION
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    OPERATIONAL TRANSCONDUCTANCE AMPLIFIERS
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    Power dissipation
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    Bandpass amplifiers
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    Cmos integrated circuits
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    Iir filters
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    Active filters