In this paper, I present FPGA implementation of a digital down converter (DDC) and digital up converter (DUC) for a single carrier WCDMA system. The DDC and DUC is complex in nature. The implementation of DDC is simple because it does not require mixers or filters. Xilinx System Generator and Xilinx ISE are used to develop the hardware circuit for the FPGA. Both the circuits are verified on the...

Extremely low voltage operation near or below threshold voltage is a key circuit technology to improve the energy efficiency of information systems and to realize ultra-low power sensor nodes. However, it is difficult to operate conventional analog circuits based on amplifier at low voltage. Furthermore, PVT (Process, Voltage and Temperature) variation and random Vth variation degrade the minim...

By definition mixed signal systems include a digital processing function and an analog or power function. When complex circuits are integrated to reduce parts count, it is typically not optimal to combine the analog and digital portions in one device. Application targeted Analog Front End (AFE) ICs tend to be a more efficient combination of circuitry than a random programmable analog array. By ...

SystemC will become more and more important for the design of digital circuits from the specification down to the RT-Level. Complex systems often contain analog components. This paper introduces concepts for the extension of the SystemC methodology for the specification and design of analog and mixed signal systems. The concepts will be illustrated on a telecommunication system including digita...

The course is targeted at all computer science, electrical, electronics, telecommunications and mechanical engineers who require the understanding of the functioning and the design of logic circuits at different levels of their complexity. The motif for this lecture is to show what are the major components and how to design digital logic for real time systems (e.g. mechatronics, robotics, compu...

The paper deals with the problem of designing main FPGA-cell blocks with the current-mode gates – novel digital gates operating with constant, continuous power supply current. Using proposed approaches to designing digital current-mode circuits, the currentmode prototypes of several digital circuits and the main basic block of FPGA cell – the function generator – are designed. The obtained circ...

Usually, digital circuits are split up into control and data path as there are speciic synthesis methods for controllers and operation units. However, all known approaches to hardware veriication which make use of this fact, model the operation unit also as a nite-state machine. This leads to enormous space requirements which limit the applicability of these approaches. In order to avoid this, ...

Digital VLSI circuits are usually classi ed into synchronous and asynchronous circuits Synchronous circuits are generally controlled by global synchronization signals provided by a clock Asynchronous circuits on the other hand do not use such global synchroniza tion signals Between these extremes there are various hybrids Digital circuits in today s commercial products are almost exclusively sy...

Nowadays, due to the increasing complexity of circuits and systems incorporating mixedsignal components, many designers recognise the advantages of, and in some cases the necessity for, mixed-signal modelling and simulation of the circuits and systems as a whole prior to, during and post production of the circuit or system. This is particularly so within the microelectronics (semiconductor) are...