Jan-Michael Stevenson

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A TV tuner fully compliant with ATSC, NTSC, PAL, SECAM, OVB-T, ISDB-T and DMB-T/H standards is described. An array of power detectors and fine-step-size digital gain controls are used to achieve an optimum signal-path gain. The tuner achieves an input sensitivity of better than -84dBm for ATSC digital off-air signals. Implemented in a 0.35mum SiGe BiCMOS(More)
Two separate studies were made with regard to generator neutral grounding practices. One of these relates to distribution transformer with secondary resistor type of grounding and specifically as to the applicability of L-N rated transformers. The second investigation relates particularly to resonant grounding and to the effect of departures from rated(More)
A quality factor (Q) tuning technique for IF and high-Q continuous-time filter biquads is proposed. The method is based on the existing magnitude locked loop Q-tuning technique, but it utilizes a modified version of the continuous-time adaptive least-mean-squares algorithm to improve the attainable precision. The technique is resistant to center frequency(More)
The increasing availability of synchrotron radiation sources in a number of geographical regions of the world has motivated an evaluation of the radiation from electron accelerators and storage rings as a possible source for ir spectroscopy. As synchrotron radiation can be analytically described, a direct comparison is made with blackbody radiation for(More)
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