This thesis describes the implementation of a low input-current chopper amplifier. Chopper amplifiers are attractive in applications where high DC precision is required, due to their low offset, drift & 1/f noise. They are generally used in the analog signal chain to boost weak sensor signals and buffer them to an analog-to-digital converter. Till recent years, research related to chopper amplifiers has focused on techniques to reduce their low frequency voltage errors and exploring effective techniques to suppress chopper-ripple. A superior performance on both these fronts has been achieved. However, at the cost of significantly large input currents (>100pA) and input current noise (>100fA/ Hz), thus limiting their usage to sensors with low source impedance (1M?) application.