De Lima, Jader A. [UNESP]2014-05-272014-05-272002-01-01Proceedings - IEEE International Symposium on Circuits and Systems, v. 2.0271-4310http://hdl.handle.net/11449/66771A low-voltage, low-power OTA-C sinusoidal oscillator based on a triode-MOSFET transconductor is here discussed. The classical quadrature model is employed and the transconductor inherent nonlinear characteristic with input voltage is used as the amplitude-stabilization element. An external bias VTUNE linearly adjusts the oscillation frequency. According to a standard 0.8μm CMOS n-well process, a prototype was integrated, with an effective area of 0.28mm2. Experimental data validate the theoretical analysis. For a single 1.8V-supply and 100mV≤VTUNE≤250mV, the oscillation frequency fo ranges from 0.50MHz to 1.125MHz, with a nearly constant gain KVCO=4.16KHz/mV. Maximum output amplitude is 374mVpp @1.12MHz. THD is -41dB @321mVpp. Maximum average consumption is 355μW.engCMOS integrated circuitsComputer simulationElectric network topologyIntegrated circuit layoutMOSFET devicesNumerical analysisQuadrature amplitude modulationTransconductanceTransfer functionsAmplitude stabilization elementCircuit complexityFinite source resistanceMaximum output amplitudeOscillation frequencyVariable frequency oscillatorsTrabalho apresentado em evento10.1109/ISCAS.2002.1011011WOS:000186280700104Acesso aberto2-s2.0-0036287115