CMOS linear programmable transconductor suitable for adjustable Gm-C filters |
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Authors: | Sanchez-Rodriguez T Lujan-Martinez CI Carvajal RG Ramirez-Angulo J Lopez-Martin A |
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Affiliation: | Univ. de Sevilla, Seville; |
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Abstract: | A novel CMOS linear programmable transconductor is presented. It is based on a telescopic cascode operational transconductance amplifier with source degeneration implemented by means of highly linear tunable active resistors. The transconductor has been designed in a 0.5 mum CMOS technology featuring a third-order intermodulation (IM3) of -54.8 dB at 10 MHz for a 1 Vpp output voltage. Its feasibility for Gm-C filter design has been experimentally validated with a 1 MHz tunable third-order Chebyshev lowpass filter suitable for Bluetooth applications. |
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