A current mirror is a circuit designed to copy a current through one active device by controlling the current in another active device of a circuit, keeping the output current constant regardless of loading.

Nov 26, 2025 · Current mirrors are a commonly useful circuit function, and sometimes high precision is essential. The challenge of getting current mirrors to be precise has created a long list of tricks and …

The current mirror is often used to provide bias currents and active loads in amplifier stages. The ideal block level concept of the current mirror is shown in figure 11.1.

A current mirror circuit is used to copy one active device’s input current to the output of other active devices. This kind of circuit is also known as an ideal current amplifier including the inverting design …

As with the CS amplifier, we can replace the resistor by current mirrors as an active load. Then, a complete differential-input, single-ended output gain stage can be realized.

This lecture deals with the design of current mirrors as both bias elements and signal processing components. Following a review of basic current mirrors, we study cascode mirror operation. Next, …

Current mirrors are found in almost every analog IC circuit to provide bias currents, current steering, and active loads. They are designed to copy (or mirror) the current flowing through a reference branch to …

Does not change output resistance or output voltage from simple bipolar current mirror Increases the input voltage by another base-emitter voltage Can be used for multiple output current sources

Oct 4, 2025 · One of the most widely used building blocks in analog design is the current mirror. A current mirror copies (or “mirrors”) a reference current into another branch of a circuit. It provides …

Current mirrors are used in the 741 op-amp.