Power consumption and size are the most important challenges faced when designing radios for distributed wireless sensor networks (WSN). Reducing power consumption requires optimization across all the layers of the communication systems. Although the MAC layer plays a crucial role in the overall energy efficiency, the radio remains one of the bottleneck for… (More)
The recent advances made in MEMS and particularly in RF MEMS technology are enabling new architectures for the integration of RF transceivers with improved performance and smaller size. Several fundamental building blocks benefit from the availability of high-Q resonators in the RF front-end, the analog baseband and the frequency synthesizer to lower power… (More)
This paper provides an overview of a concept for a Smart Skin, for enabling tactile prosthetics that provide for a natural sensation of touch. The solution embeds miniature, ultra-low power, wireless sensors into the silicone coating of the prosthetic. The solution offers advantages in terms of scalability, ability to place the sensors almost anywhere,… (More)
A sub-sampling RF front end which exploits the intrinsically high quality factor of MEMS devices for performing channel filtering directly at RF is proposed in this work. This narrow band filtering at RF also acts as a good anti-aliasing filter to support down-conversion by sub-sampling. The RF front end employs current reuse for amplification, mixing and… (More)
Recognizing the importance of interfacing a variety of sensors and networking such sensors around the body area and by cellular services, a Swiss project within the Nano-Tera.ch Initiative is dedicated to developing a platform of circuit technologies for medical data acquisition and communication.
An inductorless oscillator operating in the current domain for generating radio-frequency quadrature signals is presented. The quadrature phase and gain requirements can be achieved by cascading four low-voltage regulated cascode cells in a ring fashion. To demonstrate the proposed topology, a 0.9-V oscillator working from 0.44 GHz to 3.4 GHz and having a… (More)