Design Techniques for Wideband Single-Bit Continuous-Time Modulators With FIR Fe

Abstract

We give design considerations for single-bi tc o n t i n - uous-time Delta–Sigma modulators (CTDSMs) with FIR feedback DACs. These modulators have the low jitter sensitivity and high linearity properties characteristic of a mult ibit modulator, while using a simple one-bit quantizer, thereby combining the advan- tages of single-bit and multibit operation. We propose a method to compensate the loop for the delay introdu ced by the FIR-DAC. The ef ficacy of our architectural and circuit techniques