A modified inductance-capacitance voltage controlled oscillator (LC-VCO) topology is presented in this paper. NMOS only varactor has been used instead of variable capacitance. The frequency of oscillation of the VCO is 7.68GHz with a power dissipation of 5.68mW. The designed oscillator is characterized by a tuning range of 26.73%. Compared to the reference circuit, there is an improvement in fr...

A feasibility study of design-for-testability (DFT) of a voltage controlled crystal oscillator with built-in MOS switches to increase its observability and controllability is presented. The primary aim was to assess to what extent the operation of the circuit is changed when the switches are introduced. The possibility of non-destructive localization of faulty components in the provided test mo...

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............................................................................................................................................................. ii Acknowledgments ............................................................................................................................................. iii List of Figures .............................................................

A new CMOS LC Voltage Controlled Oscillator (VCO) for IEEE 802.11a application with low phase noise and consumed power less than 1mW is presented. This circuit was taped out by TSMC 0.18um 1P6M process. The measured phase noise is -115-88dBc/Hz at 1MHz offset at the operation frequency of 5.815GHz. And the dc core current consumption is 0.71mA at a supply voltage of 1.4 V. Its figure of merit (...

Oscillators are integral part of many electronic systems. An oscillator is an electronic device used for the purpose of generating a signal. Most electronic signal processing systems require frequency or time reference signals. This paper deals with the analysis and design of CMOS oscillators more specifically voltage controlled oscillators (VCOs).Voltage Controlled Oscillator is an electronic ...

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