A Delta-Sigma Modulator is an electronic device used to convert analog signals into digital form. It works by oversampling the input signal and using a feedback loop to reduce quantization noise. This process allows for high-resolution digital representation, making it ideal for applications like audio processing and data conversion. The modulator typically consists of a delta modulator and a sigma modulator. The delta modulator measures the difference between the input signal and the output, while the sigma modulator integrates these differences over time. Together, they enhance signal fidelity and improve performance in systems such as digital-to-analog converters and audio interfaces.