In many wireless applications, it is necessary to demodulate and digitize frequency or phase modulated signals. Most commonly, this is done using separate frequency discrimination and analog-to-digital (A/D) conversion. In low-cost IC technologies, such as CMOS, precise analog frequency discrimination is not practical, so the A/D conversion is usually performed in quadrature or at a nonzero int...

In markets that exhibit network effects, the presence of digital conversion technologies provides an alternative mechanism to achieve compatibility. This study examines the impact of conversion technologies on market equilibrium in the context of sequential duopoly competition and proprietary technology standards. We analyze this question by departing from the extant literature to endogenize th...

• Technology obsolescence • Very large quantities of digital information that may be worth preserving for reuse • Heterogeneous and complex digital resources • Lack of scalable methods for preservation • Economic models What is at stake? What is at stake? • Investments in conversion of information to digital form • Preservation of an increasing share of information that is " born-digital " • Ab...

A digital-to-analog converter system compliant with the requirements of software radio transmission interfaces is presented. The system, through a proper combination of interpolation, digital filtering and data conversion allows us to relax the speed requirements of the analog and the digital section while fully satisfying the specifications. A design example and high level simulation results a...

1 Direct conversion of a radio signal into digital representation is highly desired. Such a system would allow all radio signal processing to be done completely in the digital domain. This is beneficial for many reasons. First, it allows for an RF system to take full advantage of the availability of inexpensive digital computation brought by modern digital CMOS processes. Second, computation in...

Low power body motion detection is useful for applications including long term monitoring and image registration for internal imaging. In this paper, a linearized inherently digital capacitive tilt sensor is presented, along with progress on MEMS fabrication. The device is designed for full range (–70° to +70°) tilt ang le detection, and to generate linear digital output without analogue-to-dig...