What does lower current frequency of an npn transistor depends on?

Discussion in 'General Electronics Chat' started by viji sathish singh, May 19, 2016.

  1. viji sathish singh

    Thread Starter New Member

    May 19, 2016
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    lower current frequency of npn transistor depends on what.
    is it System Voltage, I/P impedence or O/P impedence.
    Some one please clarify
     
  2. wayneh

    Expert

    Sep 9, 2010
    12,101
    3,036
    Can you restate your question, or perhaps supply a schematic of what you are asking about? "Lower current frequency" is not a property of a transistor.
     
  3. hp1729

    Well-Known Member

    Nov 23, 2015
    1,950
    219
    Is that frequency response of a low level signal? Frequency-Gain characteristic? Then is his answer yes, yes, yes and the capacitances of the transistor?
     
  4. crutschow

    Expert

    Mar 14, 2008
    13,001
    3,229
    Bipolar transistors have inherent gain-bandwidth that depends upon the internal transistor design. This cannot be changed for a particular transistor.
    In a circuit, input and output impedances, as well as operating current also affect the frequency response.
     
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