A 2-ps Resolution Wide Range BIST Circuit for Jitter Measurement
Ind. Technol. Res. Inst., HsinchuDOI: 10.1109/ATS.2007.46 Conference: Asian Test Symposium, 2007. ATS '07. 16th
Source: IEEE Xplore
In this paper, we propose a novel built-in self-test (BIST) circuit to directly measure cycle-to-cycle jitter. The clock-under-test is under-sampled by this measurement circuit and the jitter values are transformed into digital words. A time-amplified technique is applied to obtain relatively higher resolution with smaller hardware overhead. Experimental results show that our proposed circuit is able to measure the jitter providing the clock frequency up to 2 GHz with resolution of 2 picoseconds.
Conference Paper: Experimental Results of Built-In Jitter Measurement for Gigahertz Clock[Show abstract] [Hide abstract]
ABSTRACT: This paper demonstrates a built-in jitter measurement (BIJM) circuit for Gigahertz clock. Based on a jitter-amplified technique with a pulse-removing mechanism, the pico-second level resolution is achieved in wide frequency range. The experimental results show the feasibility of the proposed BIJM circuit.Asian Test Symposium, 2008. ATS '08. 17th; 12/2008
- [Show abstract] [Hide abstract]
ABSTRACT: Abstract When simulating fluids, tetrahedral methods provide flexibility and ease of adaptivity that Cartesian grids find difficult to match. However, this approach has so far been limited by two conflicting requirements. First, accurate simulation requires quality Delaunay meshes and the use of circumcentric pressures. Second, meshes must align with potentially complex moving surfaces and boundaries, necessitating continuous remeshing. Unfortunately, sacrificing mesh quality in favour of speed yields inaccurate velocities and simulation artifacts. We describe how to eliminate the boundary-matching constraint by adapting recent embedded boundary techniques to tetrahedra, so that neither air nor solid boundaries need to align with mesh geometry. This enables the use of high quality, arbitrarily graded, non-conforming Delaunay meshes, which are simpler and faster to generate. Temporal coherence can also be exploited by reusing meshes over adjacent timesteps to further reduce meshing costs. Lastly, our free surface boundary condition eliminates the spurious currents that previous methods exhibited for slow or static scenarios. We provide several examples demonstrating that our efficient tetrahedral embedded boundary method can substantially increase the flexibility and accuracy of adaptive Eulerian fluid simulation.Computer Graphics Forum 05/2010; 29(2):695-704. DOI:10.1111/j.1467-8659.2009.01639.x · 1.64 Impact Factor
- [Show abstract] [Hide abstract]
ABSTRACT: This paper presents a particle-based model for preserving fluid sheets of animated liquids with an adaptively sampled Fluid-Implicit-Particle (FLIP) method. In our method, we preserve fluid sheets by filling the breaking sheets with particle splitting in the thin regions, and by collapsing them in the deep water. To identify the critically thin parts, we compute the anisotropy of the particle neighborhoods, and use this information as a resampling criterion to reconstruct thin liquid surfaces. Unlike previous approaches, our method does not suffer from diffusive surfaces or complex remeshing operations, and robustly handles topology changes with the use of a meshless representation. We extend the underlying FLIP model with an anisotropic position correction to improve the particle spacing, and adaptive sampling to efficiently perform simulations of larger volumes. Due to the Lagrangian nature of our method, it can be easily implemented and efficiently parallelized. The results show that our method can produce visually complex liquid animations with thin structures and vivid motions.03/2012; 18(8):1202-14. DOI:10.1109/TVCG.2012.87
Data provided are for informational purposes only. Although carefully collected, accuracy cannot be guaranteed. The impact factor represents a rough estimation of the journal's impact factor and does not reflect the actual current impact factor. Publisher conditions are provided by RoMEO. Differing provisions from the publisher's actual policy or licence agreement may be applicable.