Alessandro Italia

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A low-power wideband LC VCO has been designed and implemented in a 90-nm CMOS technology. Wide tuning range, low phase noise and low power consumption are achieved thanks to the adopted LC tank, which makes use of shunt-connected switched-coupled inductors and a proper arrangement of varactors. The shunt-connected switched-coupled inductors provide coarse(More)
This paper presents a high-linearity monolithic up-converter for 5-GHz wireless LAN applications. The circuit, implemented in a 40-GHz-f/sub T/ SiGe HBT technology, includes a variable-gain amplifier (VGA) and a double balanced mixer. By using an integrated balun at the RF output, the up-converter guarantees an output 1-dB compression point (OCP1) of 4 dBm,(More)
An ultra low-power frequency synthesizer for 400-MHz medical implantable transceivers was designed and fabricated in a 0.13-µm CMOS technology. The circuit is implemented by means of an integer-N phase-locked loop, which features a fully-integrated LC VCO and 160/480-kHz programmable channel steps. The frequency synthesizer exhibits a phase noise(More)
In this paper a novel figure of merit for the rating of integrated transformers is presented. The proposed parameter provides a more reliable performance characterization compared to previously reported ones (i.e., insertion loss and maximum available gain), since it is inherently related to the maximization of the available output power in tuned-load RF(More)
A 3-5-GHz ultra-wideband front-end for low-data rate wireless personal area networks is presented in this paper. The circuit, fabricated in a 90-nm CMOS technology, includes a Gaussian-envelope carrier-based transmitter, a direct-conversion down-converter, and an LO frequency synthesizer. A highly accurate Gaussian pulse shape is achieved by using a(More)
Two wideband LC VCOs, customized for IEEE 802.15.4a applications, are presented in this paper. Both circuits have been designed and implemented in a 90-nm CMOS technology. The first VCO has been designed for the 3.1-5 GHz UWB band. It exhibits a tuning range of 40% from 3.2 GHz to 4.8 GHz with a tuning voltage of 1.2 V. The measured phase noise at 1-MHz(More)
A 5-GHz transmitter front-end for IEEE 802.11a and HIPERLAN2 wireless local area networks was implemented in a low-cost 46-GHz-f/sub T/ silicon bipolar technology. The transmitter includes a digitally controlled linear-in-dB variable-gain up-converter and a three-stage linear power amplifier. At a 3-V supply voltage, the front-end exhibits a 23.5-dBm output(More)
This paper presents a Colpitts-based voltage-controlled oscillator (VCO) for <i>W</i>-band radar applications. In the proposed circuit, the oscillation signal is directly drawn from the switching transistor bases by means of the primary winding of a transformer tank, while the secondary winding drives the output buffer. This solution improves both tuning(More)