![]() ![]() Direct replacement for the BC109 would be the BC549 rather than 547 (yes there was a BC107!).* Calculating the corresponding collector potential Vc you will see that the BJT cannot work as desired. identical to the current Ic (at the collector node). 5.3V * Now you can calculate the current Ie, which is app. * So the emitter voltage should be (when the BJT works as desired) Ve=app.BC547 Mfr.: onsemi / Fairchild Customer #: Description: Bipolar Transistors - BJT NPN 45V 100mA Lifecycle: Obsolete Datasheet: BC547 Datasheet (PDF) ECAD … david fx trader Web. ![]()
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