BJT Amplifier Design Design for a VCEQ = 5 volts. Assume B = 50. RC = 5 k2 VBE(on) = 0.7 volts Provide values for: ICQ = IBQ = RB = Voltage gain, Av= Vout/Vin = IC RC RB 5 kohm 10 Volts IB C(Large) Vout VCE + VBE Vin

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### BJT Amplifier Design

**Objective:**  
Design for a VCEQ = 5 volts. Assume β = 50, RC = 5 kΩ, and VBE(on) = 0.7 volts. Provide values for:

- **ICQ =** _______________
- **IBQ =** _______________
- **RB =** _______________

**Voltage Gain, Av = Vout/Vin =** _______________

---

### Circuit Diagram Explanation:

This is a simplified BJT amplifier circuit diagram. Key components and their functions are as follows:

- **RB:** The base resistor, responsible for controlling the base current (IB).
- **RC (5 kΩ):** The collector resistor, which helps determine the voltage drop across it, impacting the output voltage (Vout).
- **Vin:** The input voltage to the amplifier.
- **VBE:** The base-emitter voltage, typically around 0.7 volts when conducting.
- **Vout:** The output voltage across RC, with VCE being the voltage between the collector and emitter.
- **VCC (10 Volts):** The supply voltage for the circuit.

### Steps for Completing the Design:

1. **Determine ICQ (Collector Quiescent Current):** Use the relationship IC = β × IB to solve for the quiescent collector current.

2. **Calculate IBQ (Base Quiescent Current):** Find the base current using VBE, β, and RB.

3. **Compute RB (Base Resistance):** Use the known values of ICQ, IBQ, and the voltage drops to find the optimal resistance value.

4. **Calculate Voltage Gain (Av):** This can be approximated by the formula Av = -β × (RC / RE), where RE is the emitter resistance, which might need to be assumed or calculated based on stability requirements. Adjust calculations if RE is not explicitly defined in the circuit.
Transcribed Image Text:### BJT Amplifier Design **Objective:** Design for a VCEQ = 5 volts. Assume β = 50, RC = 5 kΩ, and VBE(on) = 0.7 volts. Provide values for: - **ICQ =** _______________ - **IBQ =** _______________ - **RB =** _______________ **Voltage Gain, Av = Vout/Vin =** _______________ --- ### Circuit Diagram Explanation: This is a simplified BJT amplifier circuit diagram. Key components and their functions are as follows: - **RB:** The base resistor, responsible for controlling the base current (IB). - **RC (5 kΩ):** The collector resistor, which helps determine the voltage drop across it, impacting the output voltage (Vout). - **Vin:** The input voltage to the amplifier. - **VBE:** The base-emitter voltage, typically around 0.7 volts when conducting. - **Vout:** The output voltage across RC, with VCE being the voltage between the collector and emitter. - **VCC (10 Volts):** The supply voltage for the circuit. ### Steps for Completing the Design: 1. **Determine ICQ (Collector Quiescent Current):** Use the relationship IC = β × IB to solve for the quiescent collector current. 2. **Calculate IBQ (Base Quiescent Current):** Find the base current using VBE, β, and RB. 3. **Compute RB (Base Resistance):** Use the known values of ICQ, IBQ, and the voltage drops to find the optimal resistance value. 4. **Calculate Voltage Gain (Av):** This can be approximated by the formula Av = -β × (RC / RE), where RE is the emitter resistance, which might need to be assumed or calculated based on stability requirements. Adjust calculations if RE is not explicitly defined in the circuit.
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