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A 9-11-GHz fully integrated shock wave generator using a 0.18-μm CMOS process for in-door active imaging applications is presented. This chip includes an on-chip wideband meandering dipole antenna, a shock wave generator and a 5-bit digitally programmable delay circuit. The pulse generator simulation produces a 0.4-V peak-peak (p-p) pulse amplitude with a 45.86-ps monopulse cycle in simulation. The...
The following topics are dealt with: sensors and imaging; power gating and power distribution noise; micro electro-mechanical systems; analog and RF IC design and modeling; automation algorithms and VLSI architectures; design verification; biochips and biomedical circuits; bio-sensing and bio-system design; reliability enhancement; noise isolation; IC packaging and power delivery; and semiconductor...
This paper examines the implementation considerations of Compressive Sampling (CS) in Field Programmable Gate Array (FPGA) and proposes computation-free linear projection implementation for CS encoding in imaging applications. A simplified sensing matrix is implemented to eliminate the multiplication and summation processes in the sensing stage. This sensing paradigm does not require all pixels in...
In this paper, a block-based online compressive sampling scheme for digital pixel sensor (DPS) is proposed. The overall sensor array is divided into blocks whereby one randomly selected pixel within each block is sampled using a random access control circuit. The latter is performed using off-array horizontal and vertical control logic. The random access addresses are updated during readout phase...
For TFT-LCD panel manufacturing, gate driver circuit with amorphous silicon thin-film transistor (TFT-ASG circuit) plays an important role. In this paper, we propose two different ASG driver circuit topologies to improve crucial dynamic characteristics and then optimize them with circuit sizing by simulation-based evolutionary method which integrates genetic algorithm and circuit simulator on the...
Various high speed sequential multi-threshold voltage CMOS (MTCMOS) circuit techniques are presented and evaluated in this paper. Dedicated low leakage data preserving memory elements are integrated into the MTCMOS flip-flops. The leakage power consumption of an MTCMOS memory register is reduced by up to 67.72% as compared to the previously published conventional sequential MTCMOS circuits in a UMC...
This paper discusses the methodology used for improving power savings on a new Platform Control Hub (PCH); an advanced System-on-a-Chip (SOC). Low power design techniques had evolved from those used in multiple chips on a package designs towards more efficient ones in a System-on-a-Chip (SOC). The example that this paper is based on, had improved power savings up to 47% compared to the previous generation...
In this paper, a new peak hold circuit which detects the top value and the bottom value of the power supply noise of a VLSI circuit is proposed. We can make a noise map by distributing the circuit over the chip and find hot-spots in which large power supply noise occurs. This circuit needs no extra clean power supply or external clock signal. Also, low power consumption can be expected because it...
Ground bouncing noise produced during reactivation events is an exacerbating challenge to maintain accurate logic levels in Multi-threshold CMOS (MTCMOS) circuits. A new noise-aware MTCMOS circuit with dynamic forward body bias is explored in this paper to minimize the ground bouncing noise with smaller sleep transistors. The dynamic-forward-body-biased MTCMOS circuit lowers the peak ground bouncing...
As we are marching towards deeper sub-micron technology from process scaling, the transistor leakage itself had became more and more dominant to the total component power, which is unavoidable. Clever employment of power gating / sleep transistor / MTCMOS technology can help to shut off leakage power from un-use blocks. However over placement of power gate cells to reduce ON stage IR voltage drop...
A temperature dependent actuation voltage has been proposed to minimize the dielectric charging effect in micro-electromechanical system (MEMS) switch, leading to an improved switch lifetime. Mathematical models have been utilized to model the pull-in voltage variation throughout a range of thermal condition and simulate dielectric charging in the RF MEMS switch, enabling the analysis of charge built-up...
This paper presents analysis on parameters required for the fabrication process of RF MEMS switches. Stress analysis on gold thin film and variation of stress with different deposition conditions has been studied. Adhesion issues which occurred during the fabrication have also been high lighted. While fabricating the RF MEMS switch the suspended cantilever beam or membrane can touch the lower actuation...
Microthermophotovoltaic (micro-TPV) systems are generators currently being extensively developed to convert radiation heat energy from hydrocarbon fuel combustion into useful electricity by using low band-gap photovoltaic cell for microelectromechanical systems (MEMS). Micro-TPV systems consist of a heat source (microcombustor), a thermal emitter (microcombustor surfaces), a dielectric/optical filter,...
This paper discusses about the etching process using isotropic dry etching (XeF2) in order to get a suspended structure in microhotplate device. Suspended structure is important for thermal dissipation. In the etching process, the pressure of nitrogen gas is fixed to 0 Torr and the pressure of XeF2 is fixed to 2.5Torr. Before the etching process, the samples are cleaned with HF (0.5M) for 10 second,...
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