Find the value of the remaining components of a common emmitter amplifer circuit given Ic=3mA, Tr=ZTx300, hfe=80, F=40Hz, Ve=2.5 show workings
To find the values of the remaining components in a common emitter amplifier circuit, we need to consider the following equations and relationships:
1. Collector current (Ic) is given as 3mA.
2. Transistor current gain (hfe) is given as 80.
3. Temperature ratio (Tr) is given as ZTx300, where ZT is the temperature in degrees Celsius.
Now, let's solve for the remaining components one by one:
1. Base current (Ib):
The base current (Ib) can be calculated using the formula:
Ib = Ic / hfe
Substituting the given values:
Ib = 3mA / 80
Ib = 0.0375mA or 37.5μA
2. Voltage across the emitter resistor (Ve):
The voltage across the emitter resistor (Ve) can be calculated using Ohm's Law:
Ve = Ie * Re
(Note: In a common emitter amplifier, the emitter current (Ie) is approximately equal to the collector current (Ic))
Substituting the given values:
Ve = Ic * Re
Ve = 3mA * Re
As the value of Re is not given, we need some additional information to calculate it.
3. Input capacitor (Cin):
The input capacitor (Cin) is used for coupling the input signal to the base terminal. The value of Cin is not provided in the given information. Typically, its value is chosen based on the desired frequency response and input impedance.
4. Output capacitor (Cout):
The output capacitor (Cout) is used for coupling the output signal from the collector terminal. Similar to Cin, this value is not provided. It is generally chosen based on the desired frequency response and load impedance.
5. Resistor values (Rb, Rc):
The resistor values (Rb, Rc) are not given in the given information but are crucial for the amplifier's operation. These values are usually determined based on the desired voltage gain, bias conditions, and load impedance.
Please provide additional information such as the desired voltage gain or the values of Re, Rb, and Rc to calculate the remaining components accurately.