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Gain decrease in the in-band of a common emitter amplifier.

Discussion in 'General Electronics Discussion' started by inass bouhichia, Aug 2, 2018.

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  1. inass bouhichia

    inass bouhichia

    6
    0
    Mar 6, 2018
    Hi guys,

    I have designed a simple common emitter using the BFU660F as shown in the schematic, in the simulation i had a flat gain from approximatly 3MHz to 100Mhz, However during mesurements, i had a gain difference of 1.5dB between the gain at 3MHz and 100MHz. And i have yet to find an explanation for this and would appreciate any ideas.

    Thank you in advanve.
    upload_2018-8-2_18-42-9.png
     

    Attached Files:

  2. LvW

    LvW

    604
    146
    Apr 12, 2014
    To be honest - I am surprised that the difference is not larger than 1.5 dB.
    At frequencies as large as 100 Mhz you have to consider many parasitic effects that are not included in the simulation setup.
     
    (*steve*) likes this.
  3. WHONOES

    WHONOES

    1,124
    311
    May 20, 2017
    How are you measuring it?
     
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