intermediate frequency - translation to ιταλικό
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intermediate frequency - translation to ιταλικό

FREQUENCY TO WHICH A CARRIER WAVE IS SHIFTED AS AN INTERMEDIATE STEP IN TRANSMISSION OR RECEPTION
Intermediate Frequency; I.F. band; IF band; Intermediate frequency band; Intermediate-frequency band
  • The IF stage from a Motorola 19K1 television set ''circa'' 1949
  • The RCA Radiola AR-812<ref name="Malanowski_2011"/> used 6 triodes: a mixer, local oscillator, two IF and two audio amplifier stages, with an IF of 45&nbsp;kHz.

intermediate frequency         
frequenza intermedia
audio frequency         
  • C3, an octave below middle C. The frequency is half that of middle C (131 Hz).
  • C5, an octave above middle C. The frequency is twice that of middle C (523 Hz).
  • middle C]] (262 Hz). (Scale: 1 square is equal to 1 [[millisecond]])
PERIODIC VIBRATION WHOSE FREQUENCY IS AUDIBLE TO THE AVERAGE HUMAN
Audio frequencies; Sound frequency; Frequency (sound); Audio Frequency; Audible frequency; Audio-frequency; Audiofrequency
audiofrequenza
word list         
  • Frequency of [[personal pronoun]]s in [[Serbo-Croatian]]
LIST OF WORDS WITH THEIR FREQUENCY
Frequency list; Word-frequency lists; Word frequency list; Word frequency count; Word frequencies; Word frequency; Word lists by frequency
elenco di vocaboli relativi a un argomento specifico

Βικιπαίδεια

Intermediate frequency

In communications and electronic engineering, an intermediate frequency (IF) is a frequency to which a carrier wave is shifted as an intermediate step in transmission or reception. The intermediate frequency is created by mixing the carrier signal with a local oscillator signal in a process called heterodyning, resulting in a signal at the difference or beat frequency. Intermediate frequencies are used in superheterodyne radio receivers, in which an incoming signal is shifted to an IF for amplification before final detection is done.

Conversion to an intermediate frequency is useful for several reasons. When several stages of filters are used, they can all be set to a fixed frequency, which makes them easier to build and to tune. Lower frequency transistors generally have higher gains so fewer stages are required. It's easier to make sharply selective filters at lower fixed frequencies.

There may be several such stages of intermediate frequency in a superheterodyne receiver; two or three stages are called double (alternatively, dual) or triple conversion, respectively.