JL
John Long
235 records found
1
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Authored
A 211-1 pseudo-random binary sequence (PRBS) generator with trigger synchronization output (9.77-MHz rate) is implemented using synthetic transmission lines for the clock distribution. The full-rate data sequence is sourced from a 2:1 multiplex of dual shift register outputs sync
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The effect of second-order intermodulation (IM2) distortion produced by out-of-band, high-frequency interference on baseband/IF amplifiers is analyzed using the Volterra series. It is shown that a compensation loop designed to trap nonlinear currents improves the immunity of diff
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This book describes the digitally intensive time-domain architectures and techniques applied to millimeter-wave frequency synthesis, with the objective of improving performance and reducing the cost of implementation. Coverage includes system architecture, system level modelin ...
A 2 × 2.65 cm2 solar monopole antenna was designed and tested for both DC and RF performances within the 3¿10 GHz UWB frequency band. The amorphous silicon solar cell delivers up to 15 mW, suitable for autonomous low-power wireless transceivers. The radiation patterns and gain ar
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Two ultra low power wireless concepts are described in this paper. A high data rate receiver demonstrator consisting of LNA, sub-harmonic I/Q mixer and transimpedance IF amplifiers realizes an energy consumption of 1.75 nJ/bit at 10Mbit/s in the 17GHz band. A high-band FM-UWB rec
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The codesign of an impulse generator and miniaturized antennas for ultra-wideband impulse radio is described. The impulse generator, discussed by Bragga et al., is designedwith differential outputs that are fed to the antenna, producing an optimum match of the generator to the an
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Integration of a miniaturized ulta-wideband antenna with an impulse generator on chip is investigated. Impedance matching between an UWB antenna and an impulse generator as well as, a proper design for the antenna feeding and minimization of the influence of the chip and chip fee
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A three-stage 21-26-GHz medium-power amplifier fabricated in f/sub T/=120 GHz 0.2 /spl mu/m SiGe HBT technology has 19 dB small-signal gain and 15 dB gain at maximum output power. It delivers 23 dBm, 19.75% PAE at 22 GHz, and 21 dBm, 13% PAE at 24 GHz. The differential common-bas
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This paper presents a novel UWB communications system using double FM: a low-modulation index digital FSK followed by a high-modulation index analog FM to create a constant-envelope UWB signal. FDMA techniques at the subcarrier level are exploited to accommodate multiple users. T
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