mercury delay line - significado y definición. Qué es mercury delay line
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Qué (quién) es mercury delay line - definición

SEQUENTIAL-ACCESS REFRESHABLE MEMORY, IN WHICH AMPLIFIER AND A PULSE SHAPER ARE CONNECTED BETWEEN THE OUTPUT OF THE DELAY LINE AND THE INPUT, CREATING A LOOP THAT MAINTAINS THE SIGNAL
Acoustic delay line; Mercury delay line; Mercury delay line memory; Mercury memory; Sonic delay line; Delay line memory
  • 100-microsecond delay-line store
  • Mercury memory of [[UNIVAC I]] (1951)
  • SEAC computer]]
  • Torsion wire delay line

mercury delay line         
<storage, history> An archaic first-in first-out fixed time period data storage device using acoustic transducers to transmit data as waves in a trough or tube of mercury. EDSAC (Cambridge) and UNIVAC I used delay lines. (2002-06-12)
Delay-line memory         
Delay-line memory is a form of computer memory, now obsolete, that was used on some of the earliest digital computers. Like many modern forms of electronic computer memory, delay-line memory was a refreshable memory, but as opposed to modern random-access memory, delay-line memory was sequential-access.
Delay (audio effect)         
  • Amplitube]] 4.
  • 1976 analog solid-state delay schematic
  • Gibson Echoplex Digital Pro
  • An [[Ibanez]] DE-7 delay pedal
  • Echoplex EP-2
  • The tape mechanism of a [[Roland RE-201]] delay unit
  • Steve Harris' Delayorama software
AUDIO EFFECT REMINISCENT OF AN ECHO
Tape delay (audio effect); Echo machine; Analog delay; Doubling echo; Slapback echo; Delay (electric guitar); Delay pedal; Delay unit; Delay Pedal; Straight delay; Delay effect; Tape echo; Delay (audio); Ecco-Fonic; Delay (recording); Delay (music); Delay-line (audio); Delay-line (music); Delay-line (recording); Delay line (audio); Delay line (music); Delay line (recording); Tape-echo; Tape Echo; Multitap delay; Haas delay; Slapback
Delay is an audio signal processing technique that records an input signal to a storage medium and then plays it back after a period of time. When the delayed playback is mixed with the live audio, it creates an echo-like effect, whereby the original audio is heard followed by the delayed audio.

Wikipedia

Delay-line memory

Delay-line memory is a form of computer memory, now obsolete, that was used on some of the earliest digital computers. Like many modern forms of electronic computer memory, delay-line memory was a refreshable memory, but as opposed to modern random-access memory, delay-line memory was sequential-access.

Analog delay line technology had been used since the 1920s to delay the propagation of analog signals. When a delay line is used as a memory device, an amplifier and a pulse shaper are connected between the output of the delay line and the input. These devices recirculate the signals from the output back into the input, creating a loop that maintains the signal as long as power is applied. The shaper ensures the pulses remain well-formed, removing any degradation due to losses in the medium.

The memory capacity is determined by dividing the time taken to transmit one bit into the time it takes for data to circulate through the delay line. Early delay-line memory systems had capacities of a few thousand bits, with recirculation times measured in microseconds. To read or write a particular bit stored in such a memory, it is necessary to wait for that bit to circulate through the delay line into the electronics. The delay to read or write any particular bit is no longer than the recirculation time.

Use of a delay line for a computer memory was invented by J. Presper Eckert in the mid-1940s for use in computers such as the EDVAC and the UNIVAC I. Eckert and John Mauchly applied for a patent for a delay-line memory system on October 31, 1947; the patent was issued in 1953. This patent focused on mercury delay lines, but it also discussed delay lines made of strings of inductors and capacitors, magnetostrictive delay lines, and delay lines built using rotating disks to transfer data to a read head at one point on the circumference from a write head elsewhere around the circumference.