Transistorize amplifier circuit
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A transistor needs a direct current (DC) bias from a battery to turn on, otherwise it will remain off. The battery provides the necessary energy for the transistor to operate, but this energy must be limited so the transistor does not overheat, break down, and become unusable. The voltage applied to the transistor from the battery needs to keep the transistor operating within its safe parameters and ratings to prevent damage.
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Transistorize amplifier circuit
- 3. In the circuit, we can see the symbols for the transistor, resistor and capacitor. A BJT transistor needs a 'DC bias' for it to turn 'on' and without that bias it will stay 'off'! So we need to connect it to the battery, but we also need to do this in such a way so that the transistor won't overheat and go "pop" and then be no use to us. we need the energy from the battery to make it work, but we need to limit that energy from the battery, so the transistor can turn on and stay in the 'safe zone' of its operating parameters.
- 4. Find the voltage. Since 2N3904 maximum ratings are: IcMax= 65mA, UceMax= 20V PcMax=100mhz Solution: Uce= PcMax/Ic = 100mHz/65mA = 1.53v~ 1.5V