How many different values can a single static memory cell store that has two inverters?

To determine how many different values a single static memory cell can store with two inverters, let's analyze the behavior of the inverters.

1. Break Down the Problem

• A static memory cell with two inverters is often arranged in a feedback loop, where the output of one inverter is connected to the input of the other.
• Each inverter can output one of two states: high (1) or low (0). The input to the first inverter can also be one of these two states.

2. Relevant Concepts

• The two inverters create a bistable system, meaning it can stabilize in one of two possible configurations based on their initial input states.

3. Analysis and Detail

• Case 1: If the first inverter receives a high input (1), it will output low (0), which will be the input for the second inverter. The second inverter will then output high (1) back to the first inverter.
• Case 2: Conversely, if the first inverter receives a low input (0), it will output high (1), providing a high input for the second inverter. The second inverter will then output low (0) back to the first inverter.
• From this feedback mechanism, we see that the system can only stabilize in two states:
  • State 1: (1, 0)
  • State 2: (0, 1)

4. Verify and Summarize

• The two stable states correspond to two distinct values that the memory cell can store. There are no other possibilities due to the bistable nature of the inverters; it cannot store more than these two configurations.

Final Answer

The single static memory cell with two inverters can store 2 different values: 0 and 1.