59.2.3. Upper Cut Off Frequency

Try these first

1. 1.

   What does the upper cut off frequency indicate?

   Hint

   Think about the maximum working frequency of an amplifier.

2. 2.

   What is the formula for calculating upper cut off frequency?

   Hint

   Recall how capacitance and resistance interact in frequency response.

3. 3.

   What is upper cut off frequency?

   • A maximum current
   • Maximum voltage
   • Maximum frequency signal can effectively pass

   Hint

   Think about frequency limits instead of current or voltage.

4. 4.

   True or False? Cascading a common drain stage increases both gain and upper cut off frequency.

   • True
   • False

   Hint

   Recall the definitions of both terms.

5. 5.

   Design a common source amplifier circuit with specific values for R and C to achieve an upper cut off frequency of 1 MHz. What adjustments might be needed if the desired frequency is higher?

   Hint

   Consider the trade-off between resistance and capacitance.

6. 6.

   If a common drain stage improves upper cut off frequency but decreases gain to 4, how would you analyze this trade-off?

   Hint

   Use numerical examples to evaluate different configurations.