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Method of adjusting the resonance frequency of an L-C resonant circuit and resonant circuit
No full textAn L-C resonant circuit with an adjustable resonance frequency, having a capacitor and a first inductor electrically coupled together and a second inductor magnetically coupled to the first inductor. Additionally, there is a control circuit to sense a signal representing a first current flowing through the first inductor and to force through the second inductor a second current that is a replica of the first current for setting the adjustable resonance frequency of the L-C resonant circuit
SiON, SiO2:Ge and TripleX technologies for large-scale integration circuits: a comparison
No full textThe role of index contrast in dielectric optical waveguides
No full textThe refractive index contrast plays a fundamental role in determining the characteristics of an optical dielectric waveguide and a higher index contrast permits to move towards larger scales of integration and to access new devices and functionalities. In this paper, the impact of the index contrast on the characteristics of dielectric waveguides such as single mode regime, losses, fibre to waveguide coupling efficiency, minimum bending radius, mode hybridness, birefringence, polarisation effects, repeatability and stability, scale of integration, realisable circuits, technological constraints and available materials are investigated. Both classical step index waveguides and multilayer structures that engineers the contrast are considered
Multistage Resonant Amplifier System and Method
No full textA radio-frequency receiver for, e.g., receiving GPS signals in a cellular telephone has an input, a first gain stage in the form of a linear low noise amplifier with voltage-voltage feedback and a resonant load, and a second gain stage based on a common source input transconductor. Associated with the input and the first gain stage is a filter comprising a notch filter part for rejecting an interfering signal, e.g. a cell phone transmitter signal, and, connected between the parallel resonant circuit and the input, a series capacitance which, in combination with the inductor of the parallel-resonant circuit, forms a series-resonant circuit to provide a low impedance path at a wanted signal frequenc
A simple lumped electrical model for an RF MEMS switch considering lossy substrade effects
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