*Question E6E08:
How is power supplied to the most common type of MMIC?*  

*Correct Answer is  C: Through a resistor and/or RF choke connected to the amplifier output lead*  

### AI Response: (may contain errors)  

MMICs, or Monolithic Microwave Integrated Circuits, are commonly used in RF applications for amplification. Understanding how power is supplied to them is crucial for their operation.

### Correct Answer: C
**Through a resistor and/or RF choke connected to the amplifier output lead**

1. **Why the correct answer is correct:**
   - MMICs typically require a DC bias for operation. This bias is often supplied through the output lead using a resistor and/or an RF choke. The RF choke allows DC to pass while blocking RF signals, ensuring that the DC bias does not interfere with the RF signal path.

2. **Why the other choices are incorrect:**
   - **A: Through a capacitor and RF choke connected to the amplifier input lead**
     - Capacitors block DC, so they cannot be used to supply power. The input lead is generally used for the RF signal, not for supplying DC power.
   - **B: MMICs require no operating bias**
     - This is incorrect because MMICs do require a DC bias to function properly. Without it, the MMIC will not amplify signals.
   - **D: Directly to the bias voltage (Vcc) lead**
     - While this might seem plausible, MMICs are typically designed to have the bias supplied through the output lead to simplify the circuit design and minimize interference with the input signal.

### Useful Concepts:
- **RF Choke:** A component that blocks RF signals while allowing DC to pass. It is used to prevent RF signals from entering the DC power supply.
- **Biasing:** The process of providing a DC voltage to set the operating point of an active device like an MMIC.

Understanding these concepts helps ensure that MMICs are properly integrated into RF circuits, maintaining their performance and reliability.