A 19 nV/ $\surd$ Hz Noise 2- $\mu \text{V}$ Offset 75- $\mu \text{A}$ Capacitive-Gain Amplifier With Switched-Capacitor ADC Driving Capability
A 21 nV/$\surd$ Hz Chopper-Stabilized Multi-Path Current-Feedback Instrumentation Amplifier With 2 $\mu$ V Offset