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This electronics video tutorial explains how to calculate the voltage gain of a transistor amplifier. It explains how to calculate the base current of an emitter feedback bias circuit and a voltage divider bias circuit which is useful in calculating the AC emitter resistance of the circuit. This video also discusses the effects of the bypass capacitor across Re on the voltage gain of the circuit as well as the advantages of the swamped amplifier which is also known as the gain stabilized amplifier.

Transistors - NPN & PNP:


BJT Transistors - Electronic Switches:


Night Activated LDR Sensor Circuit:


Finding The DC Load Line & Q-Point:


Voltage Divider Bias Circuit:


Collector Feedback Bias Circuit:


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Emitter Feedback Bias Circuit:


Common Emitter Amplifier:


Common Collector & Base Amplifier:


Darlington Pair & Beta Current Gain:


Class A, AB, B, & C Amplifier Circuits:


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Multistage Transistor Amplifier Circuit:


Transistor Audio Mixer Circuit:


Operational Amplifiers:


Summing Amplifiers:


LM386 Audio Amplifier:


LC Oscillator Tank Circuit:


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