New Voltage Controlled Oscillator Design
VCO with High-frequency Performance and Low-power Low-noiseA voltage controlled oscillator (VCO) using capacitive degeneration can overcome limitations of existing topologies. The design is comprised of an inductor capacitor LC tank coupled to a negative resistance cell. The capacitively emitter-degenerated topology is used with a cross-coupled MOS pair as the degeneration cell. The cross-coupled MOS pair contributes additional conductance and results in higher maximum attainable oscillation frequency and better negative resistance characteristics than other topologies at high frequencies. These properties of the VCO, combined with small, effective capacitance, enable high-frequency performance in a low-power, low-noise implementation.BENEFITS AND FEATURES:Capacitively emitter degenerated topologyHigh-frequency performance in a low-power low-noise implementationHigher maximum attainable oscillation frequencyBetter negative resistance characteristicsOvercomes limitations of existing topologiesAPPLICATIONS:VCO applicationsDigital communicationsHigh-performance communication systemsPhase of Development - Proof of Concept
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