DragonPetter said:Does anyone know of a good textbook that would go in depth on current mirror circuits? What about methods and information on measuring low currents? My sedra and smith book does not talk anything about these subjects in detail.
A current mirror is a circuit that replicates the current of a reference circuit, typically with higher precision and stability. It is commonly used in electronic devices to accurately measure and regulate current levels.
A current mirror works by using a feedback loop to control the output current based on the input current. The reference circuit, also known as the master circuit, provides a stable reference current that is mirrored by the output circuit, also known as the slave circuit.
Current mirrors have various applications in electronic devices, including low current measurement, voltage regulation, and biasing circuits. They are also commonly used in operational amplifiers and analog-to-digital converters to improve precision and stability.
Low current measurement is the process of accurately measuring small amounts of current, typically in the range of microamps (μA) to nanoamps (nA). This is commonly achieved using current mirrors, which can replicate low currents with high precision and stability.
Current mirrors offer several advantages when used for low current measurement, including high precision, stability, and low error rates. They can also reduce the influence of external factors, such as temperature and voltage fluctuations, on the measured current. Additionally, current mirrors are relatively simple and cost-effective compared to other measurement techniques.