Electronics Letters · 2008 · 19 citations · 5 references
EngineeringElectrical EngineeringAnalog ElectronicsLow-power DesignMicroelectronicsActive FiltersAnalog FiltersCmos Circuit DesignIntegrated Circuit DesignMixed-signal Integrated Circuit DesignRadio-frequency Integrated CircuitsCmos Analog Circuit DesignCmos Analog Integrated CircuitsCmos Operational AmplifiersFilter DesignGm-c FiltersOperational Transconductance Amplifier DesignOperational Transconductance AmplifiersTransconductor Design
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 µm 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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