Implementation of Low Power Sigma Delta ADC for Broadband Communications

Abstract

For the broadband communication systems, the high data rate converters are required to achieve high accuracy and higher bandwidth. The mixed signal approach using CMOS technology is mostly preferred for these applications. Now a days, the ΣΔ converters are gaining popularity with their robustness. This design is implemented mainly in digital domain with small analog content. In this paper, a high speed 14-bit ΣΔ modulator with 2 MHz signal bandwidth with low oversampling ratio is designed. To increase the resolution, the dual quantization technique is used. It simplified the design and reduced the hardware circuitry and power consumption.