SEM stroboscopy for the evaluation of IC operating functions in the subnanosecond range

1978 ◽  
Vol 49 (6) ◽  
pp. 802-805 ◽  
Author(s):  
E. Hieke ◽  
G. Meusburger
Keyword(s):  
Subnanosecond Range

Fluorescence lifetime studies of pseudoisocyanine J-aggregates in the subnanosecond range

1984 ◽  
Vol 114 ◽  
pp. 351-354 ◽  
Author(s):  
H. Stiel ◽  
K. Teuchner ◽  
W. Becker ◽  
W. Freyer ◽  
S. Dähne
Keyword(s):  
Fluorescence Lifetime ◽  
J Aggregates ◽  
Lifetime Studies ◽  
Subnanosecond Range

The Metrological Support for Measurements of the Parameters of Intense Pulsed Electromagnetic Fields in the Subnanosecond Range

2015 ◽  
Vol 58 (9) ◽  
pp. 1023-1028
Author(s):  
K. Yu. Sakharov ◽  
V. A. Turkin ◽  
O. V. Mikheev ◽  
M. I. Dobrotvorskii ◽  
A. V. Sukhov ◽  
...  
Keyword(s):  
Electromagnetic Fields ◽  
Metrological Support ◽  
Pulsed Electromagnetic Fields ◽  
Pulsed Electromagnetic ◽  
Subnanosecond Range

scholarly journals Hybrid-Integrated Series-to-Parallel Converters for Gigabit Rates

1977 ◽  
Vol 4 (2) ◽  
pp. 57-62 ◽  
Author(s):  
G. Hanke
Keyword(s):  
Thick Film ◽  
High Speed ◽  
Conversion Ratio ◽  
Linear Arrangement ◽  
Switching Circuits ◽  
High Bit Rates ◽  
Strip Lines ◽  
Data Signal ◽  
Serial Mode ◽  
Subnanosecond Range

The generation and processing of data signal sequences in the gigabit range make high demands on circuitry and technology. For this high-speed thick-film switching circuits have proved successful. With a suitable circuitry, which is tailored to both the requirements of the subnanosecond range and the conditions of the thick-film technique, it is possible to solve many problems connected with the generation and processing of data signals in the gigabit range.The conventional method of series-to-parallel conversion with shift registers can, however, not be applied at justifiable costs with the present-day components. Therefore signal processing at the receiving end by bit error rate measuring equipment at bit rates from 640 Mbit/s up to 1,28 Gbit/s is used to demonstrate hybrid-integrated thick-film circuits which, in connection with coaxial and strip lines, allow the series-to-parallel conversion of high bit rates.The principle applied here uses lines as storing elements and high speed gates as switches. By supplying the data signal as well as the shift and sampling clocks in a serial mode, it is possible to obtain a geometrically linear arrangement of the thick-film circuits so that problems of clock supply and differing signal delays can be excluded. The combination of a few extremely high-speed thick-film circuits with commercial monolithic circuits allows series-to-parallel conversions to be performed in a simple, reliable and flexible way and in any conversion ratio.

Influence of alkyl substituents in corrphycene on geometry, electronic structure, hydrogen bonding, and tautomerization

2016 ◽  
Vol 20 (01n04) ◽  
pp. 367-377 ◽  
Author(s):  
Alexandr Gorski ◽  
Barbara Leśniewska ◽  
Grażyna Orzanowska ◽  
Jacek Waluk
Keyword(s):  
Hydrogen Transfer ◽  
Opposite Effect ◽  
Energy Structure ◽  
Tautomeric Forms ◽  
Alkyl Groups ◽  
Data Rates ◽  
Computational Data ◽  
Derivatives Of ◽  
Subnanosecond Range ◽  
Double Hydrogen

Geometry, electronic and vibrational structure, and relative energies of different tautomeric forms have been calculated for free base corrphycene and its five tetra-, octa-, and dodeca-alkyl-substituted derivatives, of which only one has been synthesized so far. The results demonstrate that the lowest energy structure always corresponds to the transtautomeric form. Comparison with the experimental IR and X-ray data available for 2,3,6,7,11,12,17,18-octaethylcorrphycene shows, in contrast to previous suggestions, that th. transspecies is dominant both in solution and crystalline phase. Based on structural, spectral, and computational data, rates of double hydrogen transfer can be predicted. Tautomerization is expected to occur in a nanosecond or subnanosecond range. The rate should strongly decrease upon substituting parent corrphycene with alkyl groups at the pyrrolic [Formula: see text] positions, whereas the opposite effect is expected for mesosubstitution. Depending on the position of substituent, planar or nonplanar geometries of the corrphycene chromophore are predicted. The nonplanarity leads to a substantial increase of the intensity of the low energy electronic transitions (Q-bands).

scholarly journals ANALYSIS OF ACCURACY OF SPATIAL SYNCHRONIZATION OF TEMPORAL POSITION OF SIGNALS OF PULSED PHASED ANTENNA ARRAY OF SUBNANOSECOND RANGE IN PRESENCE OF RANDOM CHANNEL DELAYS

2019 ◽  
pp. 73-82
Author(s):  
A. N. Flerov ◽  
A. A. Flerova
Keyword(s):  
Antenna Array ◽  
Temporal Position ◽  
Spatial Synchronization ◽  
Phased Antenna Array ◽  
Subnanosecond Range

The structure of the pulsed phased antenna array (PPAA) of the sub nanosecond range with the system of automatic synchronization  of the temporal position of the emitted ultra short pulses is presented. The analysis of the causes and the quantitative estimation of the instrumental error of the PPAA channels has been carried out. The partial contribution to the instrumental error of the  channel functional nodes is estimated. Mathematical modeling has been carried out in order to assess the effect of channel delay  spread on the total intensity of the emitted signal for the Gaussian and normal laws of their distribution. An acceptable range of variation of channel delay values is determined, correlated to the duration of the pulses emitted by the antenna modules, with an  acceptable reduction in the quality of their spatial synchronization. The locations of possible localization in the PPAA structure of  temporal modulators intended for the initial alignment of channels and electronic scanning by the beam of the radiation pattern are indicated. The requirements for the parameters of splitter modulators are formulated. The simulation results are confirmed  by experimental studies.

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