Help


[permalink] [id link]
+
Page "Atanasoff–Berry Computer" ¶ 12
from Wikipedia
Edit
Promote Demote Fragment Fix

Some Related Sentences

capacitors and on
The memory of the Atanasoff – Berry Computer was a pair of drums, each containing 1600 capacitors that rotated on a common shaft once per second.
Zeleny ( 1944 ) confirmed these results and observed the corona charge transfer. In capacitors generally, the charge is not stored in the dielectric, but on the inside surfaces of the plates, as can be observed from capacitors that can function with a vacuum between their plates.
A 2003 study found that some spurious computer crashes and general reliability issues, ranging from screen image distortions to I / O read / write errors, can be attributed not to software or peripheral hardware but to aging capacitors on PC motherboards.
It is possible, but tedious and time-consuming, to find and replace failed capacitors on PC motherboards.
Research is being conducted on harnessing the quantum effects of nanoscale capacitors to create digital quantum batteries.
The first integrated circuits held only a few devices, perhaps as many as ten diodes, transistors, resistors and capacitors, making it possible to fabricate one or more logic gates on a single device.
Series capacitors or phase-shifting transformers are used on long lines to improve stability.
In the electricity industry, inductors are said to consume reactive power and capacitors are said to supply it, even though the energy is just moving back and forth on each AC cycle.
Depending on the load and power factor of the network, the power factor controller will switch the necessary blocks of capacitors in steps to make sure the power factor stays above a selected value.
Unlike capacitors, the amount of reactive power supplied is proportional to voltage, not the square of voltage ; this improves voltage stability on large networks.
Historically, these very-low-cost power supplies incorporated a simple full-wave rectifier that conducted only when the mains instantaneous voltage exceeded the voltage on the input capacitors.
Ferroelectric capacitors are used in medical ultrasound machines ( the capacitors generate and then listen for the ultrasound ping used to image the internal organs of a body ), high quality infrared cameras ( the infrared image is projected onto a two dimensional array of ferroelectric capacitors capable of detecting temperature differences as small as millionths of a degree Celsius ), fire sensors, sonar, vibration sensors, and even fuel injectors on diesel engines.
** The voltage applied to the deflection yoke is adjusted by various means ( transformers, capacitors, center-tapped windings ) so that the half-way voltage on the sawtooth's cliff is at the zero mark, meaning that a negative voltage will cause deflection in one direction, and a positive voltage deflection in the other ; thus, a center-mounted deflection yoke can use the whole screen area to depict a trace.
Horizontal installation of through-hole parts with two axial leads ( e. g., resistors, capacitors, and diodes ) is done by bending the leads 90 degrees in the same direction, inserting the part in the board ( often bending leads located on the back of the board in opposite directions to improve the part's mechanical strength ), soldering the leads, and trimming off the ends.
In western countries, cases of bribery and other forms of corruption in all possible fields exist: under-the-table payments made to reputed surgeons by patients attempting to be on top of the list of forthcoming surgeries, bribes paid by suppliers to the automotive industry in order to sell low-quality connectors used for instance in safety equipment such as airbags, bribes paid by suppliers to manufacturers of defibrillators ( to sell low-quality capacitors ), contributions paid by wealthy parents to the " social and culture fund " of a prestigious university in exchange for it to accept their children, bribes paid to obtain diplomas, financial and other advantages granted to unionists by members of the executive board of a car manufacturer in exchange for employer-friendly positions and votes, etc.
Extra bands on ceramic capacitors will identify the voltage rating class and temperature coefficient characteristics.
The transistors and capacitors used are extremely small ; billions can fit on a single memory chip.
In an ideal condition these quantities would affect the maximum current delivered in a discharge which is expected to be associated with the charge accumulated on the capacitors at a certain moment in time.
Individual capacitors are connected or disconnected with switches based on the input.
Since no actual device holds perfectly equal and opposite charges on each of the two " plates ", it is the mutual capacitance that is reported on capacitors.

capacitors and each
Typically, manufacturers specify that each row must have its storage cell capacitors refreshed every 64 ms or less, as defined by the JEDEC ( Foundation for developing Semiconductor Standards ) standard.
A diagram of several capacitors, side by side, both leads of each connected to the same wires.
Since the capacitors used in DRAM lose their charge over time, memory assemblies that use DRAM must refresh all the cells in their chips approximately 20 times a second, reading each one and re-writing its contents.
To generate arbitrary low frequencies field the screen is parted into plates ( overlapping and connected by capacitors ) with bias voltage on each plate and a bias current on coil behind plate whose flux is closed by an outer core.
Electric circuit theory deals with ideal resistors, capacitors and inductors, each assumed to contribute only resistance, capacitance or inductance to the circuit.
On integrated circuits, important means of reducing EMI are: the use of bypass or decoupling capacitors on each active device ( connected across the power supply, as close to the device as possible ), rise time control of high-speed signals using series resistors, and V < sub > CC </ sub > filtering.
The DC line has smoothing reactors and surge arrester capacitors at each station.
The electronics consist of over 4, 000 printed circuit boards each with many Germanium diodes ( mainly OA5 ), Germanium transistors ( mainly Mullard GET872 ), resistors, capacitors and inductors.
Two capacitors are connected so that one plate is a common earth, the others are each connected to the spark gap electrodes.
With each change in polarity of the input, the capacitors add to the upstream charge and boost the voltage level of the capacitors downstream, towards the output on the right.
The standard model of amplifier noise is additive, Gaussian, independent at each pixel and independent of the signal intensity, caused primarily by Johnson – Nyquist noise ( thermal noise ), including that which comes from the reset noise of capacitors (" kTC noise ").

capacitors and drum
The design used over 300 vacuum tubes and employed capacitors fixed in a mechanically rotating drum for memory.

capacitors and were
Sales of passive components, such as capacitors and resistors, although not growing as fast as those of semi-conductors were ahead of 1959 this year, and should increase again in 1961.
PCBs were widely used as dielectric and coolant fluids, for example in transformers, capacitors, and electric motors.
PCBs were used as coolants and insulating fluids ( transformer oil ) for transformers and capacitors, such as those used in old fluorescent light ballasts.
Transformers, large capacitors, tube sockets and other large components were mounted to the top of the chassis.
The ends of lengths of wire or wire-ended components such as capacitors and resistors were pushed through the terminals, and usually looped and twisted.
PCBs were widely used as dielectric and coolant fluids in transformers, capacitors, and electric motors.
The store used a large bank of capacitors, which were either charged or not, a charged capacitor representing cross ( 1 ) and an uncharged capacitor dot ( 0 ).
PCBs were used as dielectric and coolant fluids in transformers, capacitors, and electric motors, and in a wide variety of other industrial applications.
Before the development of the Varicap, motor driven variable capacitors or saturable-core reactors were used as electrically controllable reactances in the V. C. O. s and filters of equipment like WW-II German spectrum analyzers.
Waxed paper and oiled silk capacitors were available, but devices with that order of capacitance and voltage rating were bulky and prohibitively expensive.
However, methods involving capacitors were unsuitable for integrated circuits.
Associated capacitors and resistors were contained inside the wound coil form.
Commercial factory-built electronic products were constructed from generic, discrete components such as vacuum tubes, tube sockets, capacitors, inductors and resistors, and essentially hand-wired and assembled.
Many hobbyists began by assembling Heathkits, became familiar with the appearance of components like capacitors, transformers, and tubes, and were motivated to find out just what these components actually did.
In older displays the active matrix capacitors were first drained, and then recharged to the new value with every refresh.
The game was controlled by an analog computer and " consisted mostly of resistors, capacitors and relays, but where fast switching was needed — when the ball was in play — transistor switches were used.
This technique was carried over into transistor designs also, part of the reason for which was that capacitors were large, expensive and unreliable.
Traces of radioactive elements in the packaging of the chips were producing alpha particles, which were then occasionally discharging some of the capacitors used to store the DRAM data bits.
In the 1970s, electronic components such as resistors, capacitors, transistors and even integrated circuits were common enough that interesting projects could be constructed at home with simple tools.
Four resistors were represented by silicon bridges, and other resistors and capacitors were deposited in film form directly onto the silicon block with intervening insulating films.
His systems mainly involved needle & radium-coated electricity conducting balloons or aerostats which were connected to complex converting systems consisting of coils, capacitors, spark gaps etc.

0.240 seconds.