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Implementation of an Infrared Communications System using Microelectronics Tech...
Rui Luis Andrade Aguiar; A. Manuel de Oliveira Duarte; Dinis Magalhães dos SantosThis document presents the physical layer of a wireless infrared network, with special focus on the network controller. As wireless systems are usually used with portable units, power consumption and physical size are key issues. Large scale integration techniques are required in order to fulfill these restrictions. (...)Keywords: Wireless transmission systems; wireless LANS; infrared transmission; protoco...
Sistema de Transmissão para Fibra Óptica a 622Mb/s
António Maria Sarsfield; Eduardo de Vasconcelos; Rui Aguiar; Dinis Magalhães dos SantosThe article discusses the implementation of an optical fiber transmission system, witch suports rates of 622 Mb/s (OC-12). The circuit was developed in a CMOS technology of 1.0μm (ES2). It implements the necessary serial-to-parallel and parallel-to-serial conversions. This ASIC designed in Full Custom is particulary suitable for SONET/SDH (STM-4) based applications. ; O artigo ...
High speed integrating analog-to-digital conversion
José Luis Vieira Cura; Dinis Magalhães dos SantosConversion of analog signals into digital form assumes a fundamental role in the interface between real world and the processing and information storage systems. In the last years, the evolution verified in the microelectronics area, namely in the integration technologies, allowed for the development of various types of A/D converters. (...)Keywords: A/D conversion; CMOS circuits; voltage-to-time conversio...
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