IEEE Journal of Solid-State Circuits · 1991 · 70 citations · 10 references
EngineeringElectrical EngineeringAnalog ElectronicsLow-power DesignMicroelectronicsAnalog Integrated CircuitsCmos Circuit DesignDistortion AnalysisMixed-signal Integrated Circuit DesignOscillatorsRadio-frequency Integrated CircuitsAutomatic Gain ControlCmos Analog Integrated CircuitsCmos OscillatorsDistortionsGain ControlOperational Transconductance Amplifier DesignOperational Transconductance AmplifiersTotal Harmonic Distortion
Several topology families are given to implement practical CMOS sinusoidal oscillators by using operational transconductance amplifier-capacitor (OTA-C) techniques. Design techniques are proposed taking into account the CMOS OTA's dominant nonidealities. Building blocks are presented for amplitude control, both by automatic gain control (AGC) schemes and by limitation schemes. Experimental results from 3- and 2- mu m CMOS (MOSIS) prototypes that exhibit oscillation frequencies of up to 69 MHz are obtained. The amplitudes can be adjusted between 1 V peak to peak and 100 mV peak to peak. Total harmonic distortions from 2.8% down to 0.2% have been measured experimentally.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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