High-speed Analog to Digital Converters

Due to the crowding of the EM spectrum and the plethora of communication standards, both commercial and military, the ability to adaptive receive Radio Frequency (RF) information is crucial. Using high-speed ADCs to convert directly from RF to the digital domain offers the ability to sub-sample RF signals without the cumbersome narrowband circuitry associated with […]

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Soliton electronics

Solitons are specialized nonlinear waves that propagate in nonlinear, dispersive media. They are found throughout nature in water waves, plasma, optical fibers and superconducting josephson junctions. While under investigation ever since their discovery in 1834, their application in electrical systems has been limited to ultra sharp pulse generation. In his PhD research, Prof. Ricketts developed […]

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Spin-torque Driven Oscillators for Spectrum Agile RF

In this research we investigate an emerging class of oscillators known as spin-torque oscillators (STOs). Similar to YIG oscillators, the oscillating mechanism is a gyromagnetic procession of magnetic moment in a DC bias field. Differing from the traditional YIG, STOs are not driven by an external RF field, but rather by the torque generated by […]

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Tip-directed, Field-emission Assisted Nanofabrication (TFAN)

This uses tip-directed field emission chemical vapor deposition (CVD) for the precise fabrication of structures on the nanometer scale. Device geometry will be accurately determined by probe manipulation and controlled energy delivery at the probe tip. Significantly, this approach will enable control of length, width, orientation and height during fabrication. Tip-directed CVD will focus on […]

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This lab is different from previous labs in that it is not a step-by-step experiment, but rather a design project. GOAL: You will have to design and verify a super-heterodyne receiver. The input signal consists of a desired transmitted tone at 592MHz as well as undesired interference. Challenge: Choose LO and IF frequencies to meet […]

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