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Rc (Collector resistor)¼¯µç¼«µç×è (K¦¸) 
VP (Positive Voltage)Õýµçѹ (V)
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VBE (Base to emitter drop)»ù¼«-·¢É伫µçѹ½µ (V)

Rb (Base resistor)»ù¼«µç×è (K¦¸) 

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Rb= (VP-VBE)/Ib= (VP-VBE)*·Å´óϵÊý/Ic= (VP-VBE)*·Å´óϵÊý*Rc/VP