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A 1.8V triode-type transconductor and its application to a 10MHz 3/sup rd/-order Chebyshev low pass filter
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- Authors
- Young-Ho Kim, Jung-Woo Park, Mun-Yang Park, Hyun-Kyu Yu
- Issue Date
- 2004-10
- Citation
- Custom Integrated Circuits Conference (CICC) 2004, pp.53-56
- Language
- English
- Type
- Conference Paper
- Abstract
- A fully differential dual input CMOS transconductor, with high linearity and low distortion, is proposed. To achieve high performance characteristics at low supply voltage, three design considerations are described from the viewpoint of DC-offsets, linear range, and distortions. A 1.8 V 10 MHz fully-differential 3/sup rd/-order Chebyshev Gm-C low pass filter, using this transconductor, is designed and fabricated using a 0.18 /spl mu/m CMOS process. Measured results in a nominal condition (Vc=1.05 V) show 11.3 MHz of bandwidth, 43.7 dBr of stop-band attenuation at 40 MHz, 0.38 dB of pass-band ripple, and 74.4 dB of dynamic range. In addition, the IIP3 obtained at the optimum resistance of the resistor utilized as a distortion canceller is 16.3 dBm. The filter consumes 2.34 mA at 1.8 V power supply.