What is the region of operation of M1 and M2 in fig. 6?Assuming both have same overdrive voltage and threshold voltage.

To provide an accurate answer regarding the region of operation for M1 and M2, I'd need to visually analyze Fig. 6, which isn't provided in this context. However, I can guide you through general steps and concepts relevant to analyzing MOSFET operation based on their threshold voltage (V_th) and overdrive voltage (V_ov).

1. ### Break Down the Problem

1. Identify the key parameters for both transistors, M1 and M2:

   • Threshold Voltage (V_th)
   • Overdrive Voltage (V_ov)

2. Determine the applied gate voltage (V_g) and drain-source voltage (V_ds) for both transistors if needed.

2. ### Relevant Concepts

1. The operation of MOSFETs can be classified into:

   • Cut-off Region: V_g < V_th (the transistor is off)
   • Triode Region: V_g > V_th and V_ds < (V_g - V_th)
   • Saturation Region: V_g > V_th and V_ds ≥ (V_g - V_th)

2. With overdrive voltage defined as: $V_{ov} = V_g - V_{th}$

3. ### Analysis and Detail

1. Determine M1's region of operation:

   • Check if V_g for M1 is less than V_th:
     • If yes, M1 is in the cut-off region.
   • If V_g > V_th, calculate V_ov for M1.
   • Compare V_ds to determine if M1 is in the triode or saturation region.

2. Determine M2's region of operation:

   • Apply the same logic as above to M2, using its gate voltage and drain-source voltage to determine its region of operation.

4. ### Verify and Summarize

• Check that both transistors have the same threshold and overdrive voltages. If V_ds and V_g are known, apply calculations for both to see if they share the same region (cut-off, triode, or saturation).
• Summarize findings based on the voltage conditions analyzed.

Final Answer

Without specific values for the gate and drain-source voltages, I cannot definitively state the regions of operation for M1 and M2. However, if V_g for both is greater than V_th, and the condition for V_ds is satisfied, both can operate in either triode or saturation regions depending on specific voltage values. Please consult the diagram for more precise determinations.