Constantine Sideris

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A transformer-based high-order output matching network is proposed for broadband power amplifier design, which provides optimum load impedance for maximum output power within a wide operating frequency range. A design methodology to convert a canonical bandpass network to the proposed matching configuration is also presented in detail. As a design example,(More)
This paper presents a scalable and ultrasensitive frequency-shift magnetic biosensing array scheme. The theoretical limit of the sensor noise floor is shown to be dominated by the phase noise of the sensing oscillators. To increase the sensitivity, a noise suppression technique, Correlated Double Counting (CDC), is proposed with no power overhead. As an(More)
The ever-increasing demand for higher data rates in communication links has created a need for power amplifiers with large instantaneous bandwidth. Moreover, software-defined radio and smart antenna systems require power stages capable of transmitting at programmable carrier frequencies within a large bandwidth to achieve frequency multiplicity. Also,(More)
This paper presents a scalable and ultrasensitive magnetic biosensing scheme based on on-chip LC resonance frequency-shifting. The sensor transducer gain is demonstrated as being location-dependent on the sensing surface and proportional to the local polarization magnetic field strength &#x007C;B&#x007C;<sup>2</sup> generated by the sensing inductor. To(More)
Magnetic spectroscopy allows for characterization of the magnetic susceptibility of magnetic beads across a broad frequency range. This enables differentiation and quantification of multiple beads of varying types concurrently present in the active volume of a sensor's surface. A magnetic spectrometer can be used for multi-probe tagging and identification(More)