Example embodiments relate to methods and systems for processing analog signals. One example method for processing an analog signal includes modulating the analog signal using a chopping signal with a chopping frequency fchop to generate a modulated signal. The method also includes amplifying the modulated signal to generate an amplified signal. Additionally, the method includes low-pass filtering the amplified signal to generate a filtered signal that includes at least one harmonic of the modulated signal. Further, the method includes sub-sampling the filtered signal and performing a correlated double sampling operation by subtracting samples at the chopping frequency.