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在图所示电路中,已知V cc =12V,晶体管的β=100,R' b =100kΩ。填空:要求先填文字表达式,后填得数。 (1)当U I =0V时,测得U BEQ =0.7V,若要基极电流I BQ =20uA,则R' b 和R w 之和R b =______kΩ≈______而若测得U CEQ =6V,则R c =______≈______KΩ (2)若测得输入电压有效值U t =5mV时,输出电压有效值U o =0.6V,则电压放大倍数A u =______≈______;若负载电阻R L 值与R c 相等,则带上负载后输出电压有效值U o =______V。
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