图示共发射极放大电路,已知 U CC =12V ,晶体管的 β =100 , ( 1 )当 U i =0V 时,若基极电流 I BQ =20 μ A ,则 R B ≈ ______k Ω;而若测得U CEQ =6V,则R C = ______k Ω。 (2) 若测得输入电压有效值 U i =5mv 时,输出电压有效值 U o =0.6V ,则电压放大倍数 |A|= ______ ,若输出端接一负载电阻 R L =R C ,则带上负载后输出电压有效值 U o =______ 。
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举一反三
【判断题】Skimming is to read a text quickly to gain the basic idea.
【单选题】Skimming is a very useful technique that will allow you to read selectively, that is, to read what is important and skip what is not on your immediate purpose. Now skim the passage above and choose th...
A.
the role of sales
B.
the role of marketing
C.
a key focus area of marketing
D.
not only the role of marketing but a key focus area of it