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Exp 8 - Electronics I Lab EXP 8 Fixed Bias Voltage Divider...

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Electronics I Lab EXP 8 Fixed Bias & Voltage Divider BJTs Instructor: Ms. Lama Amr Class: Monday 14:00 Work Team: Marwan Ayesh 20710041 Mahmoud R. Arekat. 20811853 17.12.10 Theoretical Overview:
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Biasing: Biasing in electronics is the method of establishing predetermined voltages and/or currents at various points of an electronic circuit to set an appropriate operating point. The operating point of a device, also known as bias point, quiescent point, or simply Q-point, is the point on the output characteristics that shows the direct current (DC), collector-emitter voltage (V CE ), and the collector current (I C ) with no input signal applied. The term is normally used in connection with devices such as transistors. Fixed Bias: The first biasing method called BASE CURRENT BIAS or sometimes FIXED BIAS. It consisted basically of a resistor (R B ) connected between the collector supply voltage and the base. Unfortunately, this simple arrangement is quite thermally unstable. If the temperature of the transistor rises for any reason (due to a
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