Transmission range

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The transmission range is the frequency range for which a device is designed by the designer.

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In amplifiers of the voltage is gain factor  v = U 2 / U 1 typically of frequency  f -dependent: at high and low frequencies, it usually takes from. The range of application of the amplifier is therefore limited by the lower limit frequency  f 1 and the upper limit frequency  f 2 , both also referred to as the transition frequency or cutoff frequency f c ( c = cutoff ). The transmission range is the frequency range between the lower and upper limit frequency.

The closer the transmission range approaches the audible range ( f 1 = 20 Hz; f 2 = 20 kHz), the more natural the sound reproduction.


A transmission range is always used when a signal passes through a two (or multiple) gate . All frequencies of the input signal outside the transmission range are heavily attenuated .

  • Helmuth Willems, Dieter Blank, Hans Mohn: communications engineering (= electrical specialist. Vol. 3). Teubner, Stuttgart 1982, ISBN 3-519-06807-9 .
  • Roland Enders: The home recording manual. The way to optimal recordings. 3rd, revised edition, revised by Andreas Schulz. Carstensen, Munich 2003, ISBN 3-910098-25-8 .


  1. The limit frequency of an electronic circuit is that frequency at which an output variable  U 2 has dropped to a value of 3  decibels below the input variable  U 1 ; the field size is 70.7% or times as much.

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