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The given circuit is a transistor-based configuration, where you are asked to find the currents and voltages. Some important details include:

- \( |V_{BE}| = 0.7 \, V \) (the base-emitter voltage drop),
- \( \beta = \infty \) (implying the current gain is infinite, or equivalently, the base current is negligible),
- \( R_1 = 9 \, \Omega \) and \( R_2 = 9 \, \Omega \).

### Circuit Breakdown:
1. **Transistors Q1-Q6**: These seem to be arranged in a mirror and current-source configuration, so we need to determine the collector current and voltage at key points.

2. **Power Supply Voltages**: The circuit has +2.7V and -2.7V as supply voltages, which can be considered symmetrical.

3. **Key Unknowns**:
   - \( I \) (Current through the transistors),
   - \( V_1, V_2, V_3, V_4, V_S \).

### Approach:
1. **Transistor Analysis (with \( \beta = \infty \))**:
   - Since \( \beta = \infty \), the base current \( I_B \approx 0 \). Hence, \( I_C \approx I_E \), the collector current will be approximately the emitter current.
   - \( V_{BE} = 0.7 \, V \), which gives the voltage difference between the base and emitter for each transistor.
   
2. **Current Calculation**:
   - The current \( I \) is primarily determined by \( R_1 \) and \( V_{BE} \). Using the relation for the base-emitter circuit of a transistor, the emitter current \( I_E \) can be approximated by:
   \[
   I = \frac{V_{CC} - V_{BE}}{R_1}
   \]
   Here, \( V_{CC} = -2.7 \, V \) and \( V_{BE} = 0.7 \, V \).

3. **Voltage at Key Nodes**:
   - For each transistor, we can apply Kirchhoff’s voltage laws to find the respective \( V_1, V_2, V_3, V_4, \) and \( V_S \).

Let me start with the current calculation and then move to voltage node calculations.It seems like I can’t do more advanced data analysis right now. Please try again later.

However, I can guide you on how to solve the problem manually if you wish. Do you want to go over the steps for current and voltage calculations?

Here are a few related questions to deepen your understanding:
1. How does the assumption \( \beta = \infty \) affect the circuit's behavior?
2. Why is the base-emitter voltage \( V_{BE} \) constant at 0.7V?
3. How would the values change if the resistor values \( R_1 \) and \( R_2 \) were different?
4. What role do the supply voltages (+2.7V and -2.7V) play in this circuit?
5. How would the circuit behave if \( \beta \) were finite instead of infinite?

**Tip**: In such circuits, using Kirchhoff's Voltage Law (KVL) and applying the correct transistor models can simplify finding unknowns.

For the circuit given below, let |V_BE| = 0.7 V and β = ∞. Find I, V1, V2, V3, V4, and Vs. R1 = 9 Ω, R2 = 9 Ω.

Learn how to analyze a transistor-based circuit with |V_BE| = 0.7V and β = ∞. This problem involves calculating current and voltages using Kirchhoff's Voltage Law and transistor theory. Suitable for college-level electrical engineering students.

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