Marks use and calculate the for differential amplifier with current mirror

Individual Assignment

Task 1 – Resistor biased differential amplifier (20 marks)

Table 1 - DC biasing parameters

EEET1415 and EEET 1467 – Circuits and Systems Simulation Individual Assignment
Date: 18-04-2021

3)Simulate a differential mode small signal input and find the single ended differential gain, 𝐴𝑉𝑑𝑚 (2.5 marks)

Task 2 – Improving the differential amplifier (20 marks)

1)Replace R1 with a simple MOSFET current mirror. Find the correct resistance value for RCurrentMirror to achieve the current shown in Figure 2. (10 marks)

3

EEET1415 and EEET 1467 – Circuits and Systems Simulation Individual Assignment
Date: 18-04-2021

2)Find the simulated differential mode gain (𝐴𝑉𝑑𝑚(𝑎𝑐𝑡𝑖𝑣𝑒 𝑙𝑜𝑎𝑑)) and common mode gain 𝐴𝑉𝑐𝑚(𝑎𝑐𝑡𝑖𝑣𝑒 𝑙𝑜𝑎𝑑) for the circuit in Figure 3. (5 marks)

3) Use 𝐴𝑉𝑑𝑚(𝑎𝑐𝑡𝑖𝑣𝑒 𝑙𝑜𝑎𝑑) and 𝐴𝑉𝑐𝑚(𝑎𝑐𝑡𝑖𝑣𝑒 𝑙𝑜𝑎𝑑) calculate the 𝐶𝑀𝑅𝑅⌉𝑑𝐵 for differential amplifier with a current mirror. (5 marks)