How does mercury delay-line memory work?
Mercury-filled delay line provides memory for first stored-program computer. A delay line stores information in serial form by continuously circulating data through a liquid or solid medium. A piezo-electric transducer converts a digital electronic signal into a series of pulses that travel through the line.
Why we will use delay line?
Delay lines provide the ability of controlling the time delay of a signal. Delay lines are basic and important elements that can find applications in radar, communications, and signal processing. In general, there are two types of delay lines: electrical delay lines and optical delay lines.
What are acoustic delay lines?
Tech Talk: Delay Lines In computers, delay lines converted data bits (ones and zeros) into sound waves, transmitted them acoustically, then converted them back into bits. They circulated forever until changed by the computer. Mercury-filled tubes had transducers at the ends to generate and receive bits.
Who invented EDSAC?
Maurice Wilkes
EDSAC, in full Electronic Delay Storage Automatic Calculator, the first full-size stored-program computer, built at the University of Cambridge, Eng., by Maurice Wilkes and others to provide a formal computing service for users.
What is delay line canceller?
Delay line canceller is a filter, which eliminates the DC components of echo signals received from stationary targets. This means, it allows the AC components of echo signals received from non-stationary targets, i.e., moving targets.
What is delay line in oscilloscope?
A delay line is used in an oscilloscope to view the leading edge of the trigger event. The trigger signal is usually derived from the vertical signal path. The trigger and sweep circuitry need about 60 ns to start so there is no signal display during this time.
Which memory is magnetic memory?
7. Which memories are if magnetic memory type? Clarification: Usually, secondary memories are of magnetic memory type that are used to store large type quantities of data. In secondary memory, data is usually stored for a long-term.
What are soft and hard ferrites?
Hard ferrites have high coercivity, so are difficult to demagnetize. They are used to make permanent magnets for applications such as refrigerator magnets, loudspeakers, and small electric motors. Soft ferrites have low coercivity, so they easily change their magnetization and act as conductors of magnetic fields.
Was EDSAC a success?
EDSAC ran its first successful program on 6th May 1949, making it the world’s first fully functional stored-program computer. One of the world’s earliest computers was born 70 years ago at the Computer Lab.
How many vacuum tubes was used in EDSAC?
17,000 vacuum tubes
With more than 17,000 vacuum tubes, 70,000 resistors, 10,000 capacitors, 6,000 switches, and 1,500 relays, it was easily the most complex electronic system theretofore built.
Why delay line is used in MTI radar?
The delay line canceller is used in MTI radar system and it works as a filter. It eliminates the clutters in received signal thereby improving the resolution of target detection. The delay line canceller subtracts echoes from the successive signals. The output of the MTI radar is given as input to delay line canceller.
What is MTI How does it operate?
Moving target indication (MTI) is a mode of operation of a radar to discriminate a target against the clutter. It describes a variety of techniques used to find moving objects, like an aircraft, and filter out unmoving ones, like hills or trees.
Why is delay line used in the vertical deflection system of a CRO?
It is used to, delay the signal for a period of time in the vertical section of CRT. The input signal is not applied directly to the vertical plates because the part of the signal gets lost when the delay Time not used.
Is CD ROM a magnetic memory?
The correct answer is secondary memory. CD-ROM stands for Compact Disc-Read Only Memory. It is used for storage of Secondary memory or secondary storage. Other secondary storage devices include magnetic disks, magnetic tapes etc.