![\"Analog](\"https:\/\/techdifferences.com\/wp-content\/uploads\/2016\/08\/Analog-Signal-Vs-digital-Signal.jpg\")
<\/p>\nThe terms “analog” and “digital” are used to distinguish two
\nlarge families of electronic circuits.<\/p>\n
<\/p>\n
Analog circuits are those that handle signals that vary
\ncontinuously and must be reproduced as accurately as possible
\npossible. For example, a vocal amplifier is a typical device
\nfully analog in which the signal produced by the microphone
\nis processed and amplified but should not be modified in its
\nessential components to ensure “fidelity” of reproduction.<\/p>\n
![\"Analog](\"https:\/\/www.technodabbler.com\/content\/images\/2014\/May\/Analog-vs-Digital.png\")
<\/p>\n
Digital circuits (from the English word “digit” which can be translated as
\ndigit or number, and therefore are also called “numeric”),
\ninstead, they deal with signals that can only have two states, usually indicated
\nby the numerical values \u200b\u200b0 and 1, which in within the circuits correspond
\ntwo clearly differentiable signal values:
\nfor example, 0 may correspond to a voltage
\nbetween 0 and 0.2 volts, while the value 1 at a voltage between 4.5 and 5 volts.
\nAn element that can assume only two states represents a “bit” of information.
\nMost of the components of a common personal computer are made
\nwith digital circuits.<\/p>\n
In reality, many of today’s electronic devices
\nThey adopt mixed technologies, part analog and part digital.
\nConsider, for example, a compact disc player. The sign that
\nrepresents the engraved piece is stored in the form typically
\ndigital: a succession of microscopic areas that can be opaque
\nor reflective, each area corresponds to a value of 0 or 1 depending on whether
\nit is opaque or reflective.
\nThe sequence of values \u200b\u200b0\/1 constitutes a digital representation
\nthe acoustic signal, so the first part of the reproduction circuit
\nuses digital techniques.<\/p>\n
To play the original sound,
\nthe sequence of bits must first be transformed into an analog signal and this step is done
\na particular circuit called a “digital \/ analog converter” that has
\nthe purpose of translating the sequence of bits into an electrical signal
\nwhich is “Analogous” to the acoustic signal originally produced by the instruments
\nthat played the piece that is being recorded.<\/p>\n
Then the analog signal can be amplified (by a circuit
\nanalog, of course) and sent to the speakers for playback
\nacoustics.<\/p>\n
Rather, consider a
\nfully analog recording and playback system: a magnetic recorder.
\nIn this case, the magnetic tape in the cassette “stores” the signal
\nacoustics in the form of variations in the intensity of magnetization,
\nthat is, the intensity of
\nmagnetization along the magnetic tape is proportional to the signal
\noriginal acoustics. In this sense, the trend of
\nmagnetization is “analogous” to the trend of the acoustic signal.<\/p>\n
The player simply transforms the variation in the magnetic field
\n“read” on tape in a “similar” variation of an electrical signal
\nwhich is then amplified and reproduced as an acoustic signal.<\/p>\n","protected":false},"excerpt":{"rendered":"