2009 IEEE International Advance Computing Conference, 2009
Abstract This paper proposes a low power linear feedback shift register (LFSR) for test pattern g... more Abstract This paper proposes a low power linear feedback shift register (LFSR) for test pattern generation (TPG) technique with reducing power dissipation during testing. The correlations between the consecutive patterns are higher during normal mode than during ...
ABSTRACT We report the investigations on the temperature dependent dielectric properties of Nd su... more ABSTRACT We report the investigations on the temperature dependent dielectric properties of Nd substituted Barium titanate compounds with compositional formula Ba6–3xNd8+2xTi18O54 (x = 0.0, 0.3 and 0.6) in a wide temperature range of −160°C to +160°C, at selected frequencies (10 KHz, 50 KHz, 100 KHz, 500 KHz, 1 MHz). Variation of dielectric parameters (i.e. dielectric constant and loss tangent) with respect to temperature showed an anomaly that occurred at low temperatures for the three compounds that were synthesized. The temperature range in which the anomalies were observed was found to be −70°C to −90°C. The temperature of the anomaly shifted to lower temperature with an increase in composition. Temperature coefficient of resonant frequency was estimated to be +92.2878 ppm/°C.
Semiconductor memories are considered one of the most important aspects of modern microelectronic... more Semiconductor memories are considered one of the most important aspects of modern microelectronics. Memories are the most important universal components in SoC (System on Chip) today. Almost all SoC’s contain some type of embedded memories, such as ROM, RAM, DRAM and flash memory. Testing them becomes a challenge as these devices become more complex. The modeling and simulation of Memory BIST is presented in this paper. The architecture is implemented using Hardware Description Language and an area overhead is analyzed. The LR algorithm is implemented on to test the SRAM faults like stuck at faults, inversion coupling faults, linked faults etc.
M-type hexagonal ferrite powders, Ba 0.5 Sr 0.5 Co x Ru x Fe (12−2x) O 19 (x = 0.0, 0.2, 0.4, 0.6... more M-type hexagonal ferrite powders, Ba 0.5 Sr 0.5 Co x Ru x Fe (12−2x) O 19 (x = 0.0, 0.2, 0.4, 0.6, 0.8, 1.0, 1.2) have been synthesized by conventional ceramic method. Magnetic properties have been investigated as a function of substitution of Co and Ru ions at applied external ...
Dielectric ceramics in the BaO–Sm2O3–TiO2 ternary system have been synthesized and characterized.... more Dielectric ceramics in the BaO–Sm2O3–TiO2 ternary system have been synthesized and characterized. Solid solutions with the formula Ba6−3xSm8+2xTi18O54 with x=0.0, 0.2–0.7 have been synthesized, which are in the vicinity of BaO·Sm2O3·4TiO2 (consistent with x=0.5) ternary system. X-ray powder diffraction (XRD) analysis of synthesized specimens has been done from which lattice parameters as a function of composition (x) were determined. Crystal
This paper deals with the investigation of structural and absorption properties of microwave diel... more This paper deals with the investigation of structural and absorption properties of microwave dielectric ceramics with the general formula Ba6–3xR8+2xTi18O54 where R = La, Sm and x = 2/3. The X-ray diffraction analysis revealed tungsten bronze type crystal structure with orthorhombic symmetry for these ceramics. The scanning electron micrograph shows uniform needle like elongated grains. Absorption properties i.e. absorption loss, return loss and insertion loss have been measured for the synthesised samples with respect to the frequency in the range 8.0 GHz–12.0 GHz at room temperature.
Bi modified Ba4La9.33Ti18O54 solid solutions were synthesized by conventional mixed oxide route. ... more Bi modified Ba4La9.33Ti18O54 solid solutions were synthesized by conventional mixed oxide route. The three composition with molar formula Ba4(La(1 - z)Biz)9.33Ti18O54 where z = 0.0, 0.1 and 0.2 were characterized for structural and dielectric properties. A detailed study related to variation in dielectric properties namely dielectric constant and dielectric loss with change in temperature from 298 K to 423 K was carried out in the frequency range 10 kHz–10 MHz. It was observed that dielectric constant decreases as the temperature increase from 298 K to 423 K in the entire frequency range for all the three samples. There was very small change in dielectric loss. The temperature coefficient of resonant frequency was estimated to improve from 273.8 ppm/K to 54.5 ppm/K as Bi contents increases from z = 0.0 to 0.2. Such materials would be a suitable candidate for applications in mobile communications.
ABSTRACT In this study, we report on the frequency dependence of dielectric and conductivity prop... more ABSTRACT In this study, we report on the frequency dependence of dielectric and conductivity properties of a Ba6 - 3xLa8 + 2xTi18O54 compound with x = 0.6 in a temperature range of 283–523 K. X-Ray diffraction confirmed the formation of single-phase compound in the orthorhombic system. Dielectric constant was observed to be decreased with increase in frequency. A dielectric anomaly has occurred at 323 K. Dielectric constant was constantly higher up to certain temperature, but then decreased linearly with rise in temperature. Loss tangent was observed to increase with temperature and frequency. A.C. conductivity increased with temperature and was frequency independent at higher frequencies.
ABSTRACT We report the investigations on the temperature dependent dielectric properties of Nd su... more ABSTRACT We report the investigations on the temperature dependent dielectric properties of Nd substituted Barium titanate compounds with compositional formula Ba6–3xNd8+2xTi18O54 (x = 0.0, 0.3 and 0.6) in a wide temperature range of −160°C to +160°C, at selected frequencies (10 KHz, 50 KHz, 100 KHz, 500 KHz, 1 MHz). Variation of dielectric parameters (i.e. dielectric constant and loss tangent) with respect to temperature showed an anomaly that occurred at low temperatures for the three compounds that were synthesized. The temperature range in which the anomalies were observed was found to be −70°C to −90°C. The temperature of the anomaly shifted to lower temperature with an increase in composition. Temperature coefficient of resonant frequency was estimated to be +92.2878 ppm/°C.
ABSTRACT Dielectric properties have been investigated and compared for three series of ceramic co... more ABSTRACT Dielectric properties have been investigated and compared for three series of ceramic compounds based on complex oxides with molecular formula Ba6 − 3xLn8 + 2xTi18O54 with Ln (lanthanide) = Sm, Nd and Gd and x = 0.0 – 0.7. X-Ray diffraction (XRD) was employed to study the crystal structure of the sintered ceramics. Fired densities have been observed to be almost constant up to a certain composition then decreased with an increase in x. Values of dielectric constant (ϵ′) and loss tangent (tanδ) were decreased with increased composition as well as frequency. The temperature coefficient of resonant frequency (τf) was estimated in the temperature range of 20°C to 80°C.
M-type hexagonal ferrite composition, Ba (1− x ) Sr x Fe 12 O 19 (x=0.0, 0.2, 0.4, 0.6, 0.8 and 1... more M-type hexagonal ferrite composition, Ba (1− x ) Sr x Fe 12 O 19 (x=0.0, 0.2, 0.4, 0.6, 0.8 and 1.0), was prepared by a two route ceramic method. Complex permittivity (ε′−jε″) and complex permeability (μ′−jμ″) have been measured using a network analyzer from 8.2 to 12.4 ...
2009 IEEE International Advance Computing Conference, 2009
Abstract This paper proposes a low power linear feedback shift register (LFSR) for test pattern g... more Abstract This paper proposes a low power linear feedback shift register (LFSR) for test pattern generation (TPG) technique with reducing power dissipation during testing. The correlations between the consecutive patterns are higher during normal mode than during ...
ABSTRACT We report the investigations on the temperature dependent dielectric properties of Nd su... more ABSTRACT We report the investigations on the temperature dependent dielectric properties of Nd substituted Barium titanate compounds with compositional formula Ba6–3xNd8+2xTi18O54 (x = 0.0, 0.3 and 0.6) in a wide temperature range of −160°C to +160°C, at selected frequencies (10 KHz, 50 KHz, 100 KHz, 500 KHz, 1 MHz). Variation of dielectric parameters (i.e. dielectric constant and loss tangent) with respect to temperature showed an anomaly that occurred at low temperatures for the three compounds that were synthesized. The temperature range in which the anomalies were observed was found to be −70°C to −90°C. The temperature of the anomaly shifted to lower temperature with an increase in composition. Temperature coefficient of resonant frequency was estimated to be +92.2878 ppm/°C.
Semiconductor memories are considered one of the most important aspects of modern microelectronic... more Semiconductor memories are considered one of the most important aspects of modern microelectronics. Memories are the most important universal components in SoC (System on Chip) today. Almost all SoC’s contain some type of embedded memories, such as ROM, RAM, DRAM and flash memory. Testing them becomes a challenge as these devices become more complex. The modeling and simulation of Memory BIST is presented in this paper. The architecture is implemented using Hardware Description Language and an area overhead is analyzed. The LR algorithm is implemented on to test the SRAM faults like stuck at faults, inversion coupling faults, linked faults etc.
M-type hexagonal ferrite powders, Ba 0.5 Sr 0.5 Co x Ru x Fe (12−2x) O 19 (x = 0.0, 0.2, 0.4, 0.6... more M-type hexagonal ferrite powders, Ba 0.5 Sr 0.5 Co x Ru x Fe (12−2x) O 19 (x = 0.0, 0.2, 0.4, 0.6, 0.8, 1.0, 1.2) have been synthesized by conventional ceramic method. Magnetic properties have been investigated as a function of substitution of Co and Ru ions at applied external ...
Dielectric ceramics in the BaO–Sm2O3–TiO2 ternary system have been synthesized and characterized.... more Dielectric ceramics in the BaO–Sm2O3–TiO2 ternary system have been synthesized and characterized. Solid solutions with the formula Ba6−3xSm8+2xTi18O54 with x=0.0, 0.2–0.7 have been synthesized, which are in the vicinity of BaO·Sm2O3·4TiO2 (consistent with x=0.5) ternary system. X-ray powder diffraction (XRD) analysis of synthesized specimens has been done from which lattice parameters as a function of composition (x) were determined. Crystal
This paper deals with the investigation of structural and absorption properties of microwave diel... more This paper deals with the investigation of structural and absorption properties of microwave dielectric ceramics with the general formula Ba6–3xR8+2xTi18O54 where R = La, Sm and x = 2/3. The X-ray diffraction analysis revealed tungsten bronze type crystal structure with orthorhombic symmetry for these ceramics. The scanning electron micrograph shows uniform needle like elongated grains. Absorption properties i.e. absorption loss, return loss and insertion loss have been measured for the synthesised samples with respect to the frequency in the range 8.0 GHz–12.0 GHz at room temperature.
Bi modified Ba4La9.33Ti18O54 solid solutions were synthesized by conventional mixed oxide route. ... more Bi modified Ba4La9.33Ti18O54 solid solutions were synthesized by conventional mixed oxide route. The three composition with molar formula Ba4(La(1 - z)Biz)9.33Ti18O54 where z = 0.0, 0.1 and 0.2 were characterized for structural and dielectric properties. A detailed study related to variation in dielectric properties namely dielectric constant and dielectric loss with change in temperature from 298 K to 423 K was carried out in the frequency range 10 kHz–10 MHz. It was observed that dielectric constant decreases as the temperature increase from 298 K to 423 K in the entire frequency range for all the three samples. There was very small change in dielectric loss. The temperature coefficient of resonant frequency was estimated to improve from 273.8 ppm/K to 54.5 ppm/K as Bi contents increases from z = 0.0 to 0.2. Such materials would be a suitable candidate for applications in mobile communications.
ABSTRACT In this study, we report on the frequency dependence of dielectric and conductivity prop... more ABSTRACT In this study, we report on the frequency dependence of dielectric and conductivity properties of a Ba6 - 3xLa8 + 2xTi18O54 compound with x = 0.6 in a temperature range of 283–523 K. X-Ray diffraction confirmed the formation of single-phase compound in the orthorhombic system. Dielectric constant was observed to be decreased with increase in frequency. A dielectric anomaly has occurred at 323 K. Dielectric constant was constantly higher up to certain temperature, but then decreased linearly with rise in temperature. Loss tangent was observed to increase with temperature and frequency. A.C. conductivity increased with temperature and was frequency independent at higher frequencies.
ABSTRACT We report the investigations on the temperature dependent dielectric properties of Nd su... more ABSTRACT We report the investigations on the temperature dependent dielectric properties of Nd substituted Barium titanate compounds with compositional formula Ba6–3xNd8+2xTi18O54 (x = 0.0, 0.3 and 0.6) in a wide temperature range of −160°C to +160°C, at selected frequencies (10 KHz, 50 KHz, 100 KHz, 500 KHz, 1 MHz). Variation of dielectric parameters (i.e. dielectric constant and loss tangent) with respect to temperature showed an anomaly that occurred at low temperatures for the three compounds that were synthesized. The temperature range in which the anomalies were observed was found to be −70°C to −90°C. The temperature of the anomaly shifted to lower temperature with an increase in composition. Temperature coefficient of resonant frequency was estimated to be +92.2878 ppm/°C.
ABSTRACT Dielectric properties have been investigated and compared for three series of ceramic co... more ABSTRACT Dielectric properties have been investigated and compared for three series of ceramic compounds based on complex oxides with molecular formula Ba6 − 3xLn8 + 2xTi18O54 with Ln (lanthanide) = Sm, Nd and Gd and x = 0.0 – 0.7. X-Ray diffraction (XRD) was employed to study the crystal structure of the sintered ceramics. Fired densities have been observed to be almost constant up to a certain composition then decreased with an increase in x. Values of dielectric constant (ϵ′) and loss tangent (tanδ) were decreased with increased composition as well as frequency. The temperature coefficient of resonant frequency (τf) was estimated in the temperature range of 20°C to 80°C.
M-type hexagonal ferrite composition, Ba (1− x ) Sr x Fe 12 O 19 (x=0.0, 0.2, 0.4, 0.6, 0.8 and 1... more M-type hexagonal ferrite composition, Ba (1− x ) Sr x Fe 12 O 19 (x=0.0, 0.2, 0.4, 0.6, 0.8 and 1.0), was prepared by a two route ceramic method. Complex permittivity (ε′−jε″) and complex permeability (μ′−jμ″) have been measured using a network analyzer from 8.2 to 12.4 ...
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