Uploaded March 2021 | Updated September 2026, 3 weeks ago

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In this video, the cascode current mirror circuit, its working, the advantage, and disadvantage of cascode current mirror is explained in detail. (with simulation)

The timestamps for the different topics in the video:
0:00 Introduction
0:20 Issues with the simple current mirror circuit (with Simulation Results)
5:23 Cascode Current Mirror Circuit and Simulation Results

The current Mirror circuits are used frequently in the integrated circuits to drive other circuits. One such example is, they are used as an active load for driving the other amplifier stages.

Issues with the Simple Current Mirror:
1) Moderate Output Impedance
2) Due to channel length modulation, the copied current is not an exact replica of the reference current

Using the cascode current mirror, these two issues can be resolved.
In this video, the working of the cascode current mirror is explained using simulations.

The disadvantage of Cascode Current Mirror:
A larger drain voltage is required to keep the MOSFETs in saturation. Because of that, the available voltage swing range for the AC signal reduces.

This video will be helpful to all the students of Science and Engineering in understanding the Cascode Current Mirror Circuit.

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