BLDC motor control using Atmega328

Differential amp has 6dB lower noise, twice the bandwidth

The traditional three op-amp differential amplifier’s signal to noise ratio can be improved by 6dB by adding a resistor and slightly changing the connections. There is a trade-off though: The traditional topology has a high input impedance, whereas the low-noise version has a lower input impedance. Figure 1 depicts a traditional three op-amp differential amplifier. […]

Differential amp has 6dB lower noise, twice the bandwidth Read More Β»