Problem #3 - npn transistor - DC Analysis – CV model Vcc Vec Vcc Assume that Q1 and Q2 are both operating in forward-active. Do NOT assume that they are identical. Keep all subscripts! Ry VA Q2 Solve for an expression for VX. Assume finite B. Solve for an expression for VA in terms of VX a) b) (just in case you get the first part wrong). Assume finite R2 В. Ig R3

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**Problem #3 - NPN Transistor – DC Analysis – CV Model**

Assume that Q1 and Q2 are both operating in forward-active. Do **NOT** assume that they are identical. Keep all subscripts!

a) Solve for an expression for VX. Assume finite β.

b) Solve for an expression for VA in terms of VX (just in case you get the first part wrong). Assume finite β.

---

**Diagram Explanation:**

The circuit diagram displays two NPN transistors labeled Q1 and Q2. 

- V_CC is the supply voltage connected to the circuit.
- R1 is connected to the base of Q1, and R2 is connected between this base and ground.
- The point between R1 and R2 is marked as VX. 
- A current source symbol labeled I_B is directed into VX from below.
- Transistor Q1 is connected with its collector to V_CC and its emitter towards VX.
- The collector of Q2 is connected to V_CC via R4, and its emitter is connected to ground through R3. 
- The base of Q2 is connected to the collector of Q1, and the output voltage is marked as VA.
Transcribed Image Text:**Problem #3 - NPN Transistor – DC Analysis – CV Model** Assume that Q1 and Q2 are both operating in forward-active. Do **NOT** assume that they are identical. Keep all subscripts! a) Solve for an expression for VX. Assume finite β. b) Solve for an expression for VA in terms of VX (just in case you get the first part wrong). Assume finite β. --- **Diagram Explanation:** The circuit diagram displays two NPN transistors labeled Q1 and Q2. - V_CC is the supply voltage connected to the circuit. - R1 is connected to the base of Q1, and R2 is connected between this base and ground. - The point between R1 and R2 is marked as VX. - A current source symbol labeled I_B is directed into VX from below. - Transistor Q1 is connected with its collector to V_CC and its emitter towards VX. - The collector of Q2 is connected to V_CC via R4, and its emitter is connected to ground through R3. - The base of Q2 is connected to the collector of Q1, and the output voltage is marked as VA.
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