Analog Time Multiplexing for Digital-to-Analog Conversion

TL;DR

This paper proposes performing time multiplexing in the analog domain for sigma-delta based digital-to-analog converters, aiming to improve robustness against dynamic effects by leveraging analog domain multiplexing instead of digital.

Contribution

It introduces a novel approach of analog time multiplexing in digital-to-analog conversion, enhancing robustness and potentially overcoming speed limitations of digital multiplexing.

Findings

Analog time multiplexing improves robustness against dynamic effects.

The proposed method addresses speed constraints of digital multiplexing.

Potential for more reliable high-speed DACs.

Abstract

The signal bandwidth of Digital to Analog Converters based on Sigma Delta Modulation is limited by speed constrains. Time-Interleaving allows coping with complexity vs. speed by replacing the original architecture by M parallel paths. These path are clocked at a frequency M times smaller and their digital outputs time multiplexed. This is then converted to analog by means of a Digital to Analog Converter clocked at the high rate. This preprint proposes that time multiplexing be performed in the analog domain. As a result robustness against dynamic effects is achieved.