scispace - formally typeset
Search or ask a question
JournalISSN: 2153-1285

Circuits and Systems 

Scientific Research Publishing
About: Circuits and Systems is an academic journal published by Scientific Research Publishing. The journal publishes majorly in the area(s): CMOS & Inverter. It has an ISSN identifier of 2153-1285. It is also open access. Over the lifetime, 637 publications have been published receiving 3579 citations. The journal is also known as: CS.


Papers
More filters
Journal ArticleDOI
TL;DR: In this paper, the authors presented an optimization of the voltage doubler stages in an energy conversion module for Radio Frequency (RF) energy harvesting system at 900 MHz band, where the function of the module is to convert the RF signals into direct-current voltage at the given frequency band to power the low power devices/circuits.
Abstract: This paper presents an optimization of the voltage doubler stages in an energy conversion module for Radio Frequency (RF) energy harvesting system at 900 MHz band The function of the energy conversion module is to convert the (RF) signals into direct-current (DC) voltage at the given frequency band to power the low power devices/circuits The design is based on the Villard voltage doubler circuit A 7 stage Schottky diode voltage doubler circuit is designed, modeled, simulated, fabricated and tested in this work Multisim was used for the modeling and simulation work Simulation and measurement were carried out for various input power levels at the specified frequency band For an equivalent incident signal of –40 dBm, the circuit can produce 3mV across a 100 k? load The results also show that there is a multiplication factor of 22 at 0 dBm and produces DC output voltage of 50 V in measurement This voltage can be used to power low power sensors in sensor networks ultimately in place of batteries

71 citations

Journal ArticleDOI
TL;DR: This paper evaluates the performance of various implementations of QCA based XOR gates and proposes various novel layouts with better performance parameters and presented the various QCA circuit design methodology for XOR gate.
Abstract: Quantum-dot cellular automaton (QCA) is an emerging, promising, future generation nanoelectronic computational architecture that encodes binary information as electronic charge configuration of a cell. It is a digital logic architecture that uses single electrons in arrays of quantum dots to perform binary operations. Fundamental unit in building of QCA circuits is a QCA cell. A QCA cell is an elementary building block which can be used to build basic gates and logic devices in QCA architectures. This paper evaluates the performance of various implementations of QCA based XOR gates and proposes various novel layouts with better performance parameters. We presented the various QCA circuit design methodology for XOR gate. These layouts show less number of crossovers and lesser cell count as compared to the conventional layouts already present in the literature. These design topologies have special functions in communication based circuit applications. They are particularly useful in phase detectors in digital circuits, arithmetic operations and error detection & correction circuits. The comparison of various circuit designs is also given. The proposed designs can be effectively used to realize more complex circuits. The simulations in the present work have been carried out using QCADesigner tool.

69 citations

Journal ArticleDOI
TL;DR: This paper presents a new current-mode single input multi output (SIMO) type biquad employing one voltage differencing transconductance amplifier (VDTA), two grounded capacitors and a single grounded resistor.
Abstract: This paper presents a new current-mode single input multi output (SIMO) type biquad employing one voltage differencing transconductance amplifier (VDTA), two grounded capacitors and a single grounded resistor. The configuration realizes all basic filter functions (i.e. Low Pass (LP), High Pass (HP), Band Pass (BP), Notch (BR) and All Pass (AP)). The natural frequency (ω0) and bandwidth (BW) are independently tunable. The workability of proposed configuration has been verified using SPICE simulation with TSMC CMOS 0.18 μm process parameters.

61 citations

Book ChapterDOI
TL;DR: In this article, composability and predictability are used to reduce the complexity of system-on-chip (soc) design for real-time requirements such as minimum throughput or a maximum latency.
Abstract: System-on-chip (soc) design gets increasingly complex, as a growing number of applications are integrated in modern systems. Some of these applications have real-time requirements, such as a minimum throughput or a maximum latency. To reduce cost, system resources are shared between applications, making their timing behavior inter-dependent. Real-time requirements must hence e verified for all possible combinations of concurrently executing applications, which is not feasible with commonly used simulation-based techniques. This chapter addresses this problem using two complexity-reducing concepts: composability and predictability. Applications in a composable system are completely isolated and cannot affect each other's behaviors, enabling them to be independently verified. Predictable systems, on the other hand, provide lower bounds on performance, allowing applications to be verified using formal performance analysis. Five techniques to achieve composability and/or predictability in soc resources are presented and we explain their implementation for processors, interconnect, and memories in our platform.

55 citations

Journal ArticleDOI
TL;DR: In this article, a multi-spiral stacked solenoidal inductor for biomedical application in 13.56 MHz band is presented, which shows higher inductance and better figure-of-merit values compared to PCB inductors reported in literature, which are desirable for wireless power transfer system.
Abstract: Wireless power transfer via inductive link is becoming a popular choice as an alternate powering scheme for biomedical sensor electronics. Spiral printed circuit board (PCB) inductors are gaining attractions for wireless power transfer applications due to their various advantages over conventional inductors such as low-cost, batch fabrication, durability, manufacturability on flexible substrates, etc. In this work, design of a multi-spiral stacked solenoidal inductor for biomedical application in 13.56 MHz band is presented. Proposed stacking method enhances the inductance density of the inductor for a given area. This paper reports an optimization technique for design and implementation of the PCB inductors. The proposed scheme shows higher inductance and better figure-of-merit values compared to PCB inductors reported in literature, which are desirable for wireless power transfer system.

52 citations

Performance
Metrics
No. of papers from the Journal in previous years
YearPapers
20232
20221
20204
20193
201818
201720