2005 · 10 citations · 3 references
EngineeringComputer EngineeringElectrical EngineeringAnalog ElectronicsLow-power DesignMicroelectronicsAnalog Integrated CircuitsCmos Circuit DesignDigital Integrated Circuit DesignLow-noise Circuit DesignLow-power Digital Circuit DesignMixed-signal Integrated Circuit DesignAnalog Circuit DesignCmos Analog Circuit DesignCmos Analog Integrated CircuitsOperational Amplifier CircuitsOperational Amplifier DesignPower ConsumptionThermal NoiseThermal Noise Reduction
A new cyclic ADC structure based on capacitor sharing is presented. This technique reduces the die area of the capacitors in the switched capacitor network by up to 50%. As a result, the proposed scheme also significantly reduces the power consumption requirement of the operational amplifier. This is achieved while maintaining the thermal noise performance and conversion rate of the conventional structure. A 10-bit, 2.3MHz cyclic ADC using the new structure is implemented in 0.5 /spl mu/m CMOS. Spectre simulation results of the new structure are presented.
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