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Nanoscale CMOS technologies, which were sensitive to electrostatic discharge (ESD), have been widely used to implement radio-frequency (RF) integrated circuits. Against ESD damages, ESD protection design must be included in RF circuits. A novel modified LC-tank ESD protection design was presented in this work. Such ESD protection circuit had been designed for 60-GHz RF applications and verified in...
Networks made up of bio-inspired neuron oscillatory circuits with nanoscale memristors may achieve the large connectivity and highly parallel processing power of biological systems. Memristor also has potential to reproduce the behavior of a biological synapse. As in a living creature the weight of a synapse is adapted by ionic flow through it, so the conductance of a memristor is controlled by flux...
One of the most important developments in the wireless industry within the last decade was the digitization of RF circuitry. This was in response to the incredible advancements of the mainstream CMOS technology in both processing speed and circuit density, as well as the relentless push to reduce total solution costs through integration of RF, analog and digital circuitry. Since the digital baseband...
This paper presents a novel architecture and its implementation for a versatile, miniaturised mote which can communicate concurrently using a variety of combinations of ISM bands, has increased processing capability, and interoperability with mainstream GSM technology. All these features are integrated in a small form factor platform. The platform can have many configurations which could satisfy a...
In this paper, the N-phase current driven passive mixer clocked by 1/N duty-cycle clocks is analyzed. The analysis shows that the N-phase passive mixer holds the property of impedance transformation, where it can frequency-translate baseband lowpass impedances into RF frequency to synthesize high-Q bandpass filters. This property can be used to replace the off-chip SAW filter in wireless receivers...
Testing the analog functions of a system-on-chip makes up the major portion of test cost - up to 50% according to anecdotal evidence - although analog circuits occupy less than 5% of the die area. Furthermore, cases have been reported where the test cost actually surpasses the overall manufacturing cost. This shows that analog test is in the coming years an area for industry focus, innovation and...
This paper presents analytical expressions for the sensitivity of a low power envelope detector driven by a weak RF signal in the presence of a blocking signal. The envelope detector has been proposed for low power Wake-Up radios in applications such as RFID and wireless sensor systems. The theoretical results are verified with simulations of a modern short channel MOS transistor in a commonly used...
A 2.4-GHz CMOS single ended-input differential-output front-end built with a common source low noise amplifier (CS-LNA) and a switched transconductor mixer (SW-MIX) is presented. The circuit is designed and optimized to work in a ZigBee receiver. Since this is a low power consumption standard, a single-ended LNA is preferred over a fully-differential topology because it leads to lower cost in area...
Testing an RF device in Production is expensive and technically difficult. At Wafer Test level, the RF probing technologies hardly fulfil the industrial test requirements in terms of accuracy, reliability and cost. At Package test level testing the RF parameters requires expensive RF equipments (RF automated test equipments (ATE)) and for complex RF transceivers, which address multi-modes (RF multi-paths...
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