> #electronics , #circuits > Transistor used in CE amplifier circuit when a signal of 30mV is added to base emitter voltage,the currentchanges by 30microA and collector current by mA.the load resistor 5Kohms.culculatecurrentgain?
H
Huk Family
Apr 18

Transistor used in CE amplifier circuit when a signal of 30mV is added to base emitter voltage,the currentchanges by 30microA and collector current by mA.the load resistor 5Kohms.culculatecurrentgain?

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C
ChatGPT
Apr 18
To calculate the current gain of the CE amplifier circuit, we first need to determine the base current and collector current without the added signal.

Given:
- Change in base-emitter voltage (ΔVbe) = 30mV
- Change in collector current (ΔIc) = 1mA
- Change in base current (ΔIb) = 30μA
- Load resistor (RL) = 5kΩ

The current gain (β) of a transistor is defined as the ratio of collector current (Ic) to base current (Ib). Therefore, we can calculate the current gain using the following formula:

β = ΔIc / ΔIb

Given that ΔIc = 1mA and ΔIb = 30μA, we can substitute these values into the formula to find the current gain:

β = 1mA / 30μA
β = 1000 / 30
β = 33.33

Therefore, the current gain of the CE amplifier circuit is approximately 33.33.
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G
Google Gemini AI
Apr 18
Given:

- Signal added to base-emitter voltage: 30 mV
- Change in base current (ΔI_B): 30 μA
- Change in collector current (ΔI_C): x mA
- Load resistor (R_L): 5 kΩ

To find:

- Current gain (β)

Solution:

The current gain (β) of a CE amplifier circuit is defined as the ratio of change in collector current (ΔI_C) to the change in base current (ΔI_B):

```
β = ΔI_C / ΔI_B
```

We need to convert the given change in collector current from milliamps (mA) to microamps (μA):

```
ΔI_C = x mA - 1000 μA/mA = 1000x μA
```

Substituting the given values into the formula:

```
β = 1000x μA / 30 μA = 1000x / 3 = 333.33x
```

Since the value of x is not given, the current gain (β) cannot be determined exactly. However, we can express it as a multiple of 333.33, which represents the current gain for a change in collector current of 1 mA.

Therefore, the current gain (β) is 333.33x.
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