High-speed low-power Sigma-Delta analog-to-digital converter and digital processing unit

Abstract

The invention provides a high-speed and low-power-consumption Sigma-Delta analog-to-digital converter and a digital processing unit. The analog-to-digital converter comprises a first analog sampling module, a second digital quantization module and a reference voltage source; wherein the first analog sampling module comprises a first mode electric signal conversion circuit, a first anti-aliasing filter, a first sampling hold circuit and a Sigma-Delta modulator; the second digital quantization module comprises a second digital filter, a second downsampling filter and a digital output circuit; the reference voltage source is connected with the Sigma-Delta modulator and provides reference voltage for the Sigma-Delta modulator; the reference voltage source comprises a starting circuit, a sub-threshold current generating circuit, a negative temperature coefficient circuit, a positive temperature coefficient circuit and a rear feedback circuit; and the digital processing unit comprises a regulator and is used for providing a front control signal for the reference voltage source and enabling a reference voltage value output by the reference voltage source to be variable.

Description

technical field [0001] The invention belongs to the technical field of high-performance analog-to-digital converters, in particular to a high-speed and low-power Sigma-Delta analog-to-digital converter and a digital processing unit. Background technique [0002] In the real world, all naturally occurring signals are analog in nature. Over the past thirty years, due to the emergence of VLSI (Very large scale integration, VLSI), various signals with higher precision, higher reliability and lower price can be realized in the digital domain than in the analog domain. Processing function. The ability of digital signals to suppress noise is much greater than that of analog signals. During the storage and transmission of analog signals, noise and distortion will be accumulated, which will have adverse effects on signal processing. In the digital domain, digital signals can be stored and transmitted without loss. In telecommunications, voice, video, computing, and many other appl...

AI Technical Summary

Problems solved by technology

The ability of digital signals to suppress noise is much greater than that of analog signals. During the storage and transmission of analog signals, noise and distortion will be accumulated, which will have adverse effects on signal processing.

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