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BJT trans. in Satuation Mode

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http://forum.allaboutcircuits.com – Hi guys, i have been solved the problems as attached photos problem 1 as attached photo #1 What is the value of EE-voltage to make the transistor in Saturation mode?? btw I solved this problem and found IE = 0.36mA , Ic= 0.342mA and Vcb = 7.8 volts Problem 2 as attached photo #2 What is the value of Rb-resistor to make the transistor in Saturation mode?? btw I solved this problem and found IB = 0.23mA , Ic= 9.2mA and Vce = 21.2 volts Attached Images 1.jpg (232.2 KB) 2.jpg (214.2 KB) (Embedded)