Electronic I - UniMAP Portal
... Opens in the external resistors or connections of the base or the collector circuit would cause current to cease (to stop) in the collector and the voltage measurements would indicate this. Internal opens within the transistor itself could also cause transistor operation to cease. ...
... Opens in the external resistors or connections of the base or the collector circuit would cause current to cease (to stop) in the collector and the voltage measurements would indicate this. Internal opens within the transistor itself could also cause transistor operation to cease. ...
Raychem Testing Locating Faults Engineering Specifications
... WARNING: Fire hazard in hazardous locations. Insulation resistance tests can produce sparks. Be sure there are no flammable vapors in the area before conducting this test. Fault Location Testing MI heating cable is the most rugged heating cable available; however, damage does occur occasionally. Mos ...
... WARNING: Fire hazard in hazardous locations. Insulation resistance tests can produce sparks. Be sure there are no flammable vapors in the area before conducting this test. Fault Location Testing MI heating cable is the most rugged heating cable available; however, damage does occur occasionally. Mos ...
ENERGY RESOLUTION: GEOMETRY AND NOISE ASSESSMENT
... factor which, in turn, depends on the bias set point. In order to see whether it is indeed this type of noise that is present in this type of sensor, we can plot the measured and calculated noise as a function of set point. Using an RMS voltmeter, the noise integrated over the whole bandwidth was me ...
... factor which, in turn, depends on the bias set point. In order to see whether it is indeed this type of noise that is present in this type of sensor, we can plot the measured and calculated noise as a function of set point. Using an RMS voltmeter, the noise integrated over the whole bandwidth was me ...
current electrycity type 1
... In absence of potential difference across a conductor no net current flows through a corss section. When a potential difference is applied across a conductor the charge carriers (electrons in case of metallic conductors) flow in a definite direction which constitutes a net current in it . These elec ...
... In absence of potential difference across a conductor no net current flows through a corss section. When a potential difference is applied across a conductor the charge carriers (electrons in case of metallic conductors) flow in a definite direction which constitutes a net current in it . These elec ...
A-1 Thermal and Shot Noise - Physics 191r
... there are a variety of other noise sources across the electromagnetic spectrum. These include noise from the power line frequency (and harmonics), AM, FM, & TV broadcasts, communication and computation devices, microwaves, etc, etc. Indeed, the amount of electromagnetic radiation surrounding you is ...
... there are a variety of other noise sources across the electromagnetic spectrum. These include noise from the power line frequency (and harmonics), AM, FM, & TV broadcasts, communication and computation devices, microwaves, etc, etc. Indeed, the amount of electromagnetic radiation surrounding you is ...
Tracy Elizabeth Adams Cancer Treatment
... volumetric blood flow. Blood flow is a significant determinant of tissue temperature during hyperthermia. Blood flow varies widely depending on tumor type and size and is heterogeneous even within a given tumor. [7] Clinical data from patients shows that perfusion can vary much more than 5% from sec ...
... volumetric blood flow. Blood flow is a significant determinant of tissue temperature during hyperthermia. Blood flow varies widely depending on tumor type and size and is heterogeneous even within a given tumor. [7] Clinical data from patients shows that perfusion can vary much more than 5% from sec ...
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... diagram, SEM image, and electrical characteristics of backgated nanotube devices. On the basis of the transferred nanotubes on Si with 50 nm SiO2, 5 Å of Ti and 70 nm of Pd were deposited as source/drain electrodes (Figure 2a), followed by the removal of nanotubes outside the active channel with O2 ...
... diagram, SEM image, and electrical characteristics of backgated nanotube devices. On the basis of the transferred nanotubes on Si with 50 nm SiO2, 5 Å of Ti and 70 nm of Pd were deposited as source/drain electrodes (Figure 2a), followed by the removal of nanotubes outside the active channel with O2 ...
Active Layer Patterned Organic Thin
... The pentacene TFTs were fabricated a bottom-contact structure. Cr/Al/Cr and Au/Ti were used for the gate and the source/drain metals, respectively, and they were deposited by sputtering and e-beam evaporation methods, respectively. For OTFT with an organic gate insulator, J1 was deposited onto the p ...
... The pentacene TFTs were fabricated a bottom-contact structure. Cr/Al/Cr and Au/Ti were used for the gate and the source/drain metals, respectively, and they were deposited by sputtering and e-beam evaporation methods, respectively. For OTFT with an organic gate insulator, J1 was deposited onto the p ...
Octal high-side smart power solid-state relay with serial/parallel
... with integrated SPI interface and high efficiency 100 mA micropower step-down switching regulator peak current control loop mode. The IC, realized in STMicroelectronics VIPower™ technology, is intended to drive any kind of load with one side connected to ground. Active channel current limitation com ...
... with integrated SPI interface and high efficiency 100 mA micropower step-down switching regulator peak current control loop mode. The IC, realized in STMicroelectronics VIPower™ technology, is intended to drive any kind of load with one side connected to ground. Active channel current limitation com ...
Lesson 1 - Introduction - AD Universidad de Oviedo
... • Power MOSFETs are excellent power devices to be used in power converters up to a few kWs. • They have good switching characteristics because they are unipolar devices. • This means that the current is due to majority carriers exclusively and that it does not pass through any PN junction. • Due to ...
... • Power MOSFETs are excellent power devices to be used in power converters up to a few kWs. • They have good switching characteristics because they are unipolar devices. • This means that the current is due to majority carriers exclusively and that it does not pass through any PN junction. • Due to ...
MAX3646 155Mbps to 622Mbps SFF/SFP Laser Driver with Extinction Ratio Control General Description
... The MAX3646 is a +3.3V laser driver designed for multirate transceiver modules with data rates from 155Mbps to 622Mbps. Lasers can be DC-coupled to the MAX3646 for reduced component count and ease of multirate operation. Laser extinction ratio control (ERC) combines the features of automatic power c ...
... The MAX3646 is a +3.3V laser driver designed for multirate transceiver modules with data rates from 155Mbps to 622Mbps. Lasers can be DC-coupled to the MAX3646 for reduced component count and ease of multirate operation. Laser extinction ratio control (ERC) combines the features of automatic power c ...
BQ24314 数据资料 dataSheet 下载
... Chip enable input. Active low. When CE = High, the input FET is off. Internally pulled down. ...
... Chip enable input. Active low. When CE = High, the input FET is off. Internally pulled down. ...
BD2224G-LB ,BD2225G-LB
... When excessive current flows due to output short-circuit or so, ringing occurs because of inductance between power source line to IC, and may cause bad influences on IC operations. In order to avoid this case, connect a bypass capacitor across IN terminal and GND terminal of IC. 1μF or higher is rec ...
... When excessive current flows due to output short-circuit or so, ringing occurs because of inductance between power source line to IC, and may cause bad influences on IC operations. In order to avoid this case, connect a bypass capacitor across IN terminal and GND terminal of IC. 1μF or higher is rec ...
Thermal runaway
Thermal runaway refers to a situation where an increase in temperature changes the conditions in a way that causes a further increase in temperature, often leading to a destructive result. It is a kind of uncontrolled positive feedback.In other words, ""thermal runaway"" describes a process which is accelerated by increased temperature, in turn releasing energy that further increases temperature. In chemistry (and chemical engineering), this risk is associated with strongly exothermic reactions that are accelerated by temperature rise. In electrical engineering, thermal runaway is typically associated with increased current flow and power dissipation, although exothermic chemical reactions can be of concern here too. Thermal runaway can occur in civil engineering, notably when the heat released by large amounts of curing concrete is not controlled. In astrophysics, runaway nuclear fusion reactions in stars can lead to nova and several types of supernova explosions, and also occur as a less dramatic event in the normal evolution of solar mass stars, the ""helium flash"".There are also concerns regarding global warming that a global average increase of 3-4 degrees Celsius above the preindustrial baseline could lead to a further unchecked increase in surface temperatures. For example, releases of methane, a greenhouse gas more potent than CO2, from wetlands, melting permafrost and continental margin seabed clathrate deposits could be subject to positive feedback.