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

A technology of digital processing unit and analog-to-digital converter, applied in the direction of analog-to-digital converter, analog-to-digital conversion, code conversion, etc., can solve the problems of noise and distortion accumulation, poor signal processing, etc., and reduce DC offset and low-frequency noise , low power consumption, and the effect of improving the signal-to-noise ratio

Pending Publication Date: 2021-06-18
JIANGSU RUNIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 trans

Method used

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

Examples

Experimental program
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Embodiment Construction

[0032] see figure 1 , a module combination architecture diagram of a high-speed, low-power Sigma-Delta analog-to-digital converter according to an embodiment of the present invention.

[0033] exist figure 1 wherein, the analog-to-digital converter includes a first analog sampling module, a second digital quantization module, and a reference voltage source; wherein, the first analog sampling module includes a Sigma-Delta modulator.

[0034] The reference voltage source is connected to the Sigma-Delta modulator to provide a reference voltage for the Sigma-Delta modulator.

[0035] It should be pointed out that the reference voltage source described in this embodiment is not only used to provide the current required by the reference output, but also used to generate four bias voltages required by the subsequent operational amplifiers, which greatly simplifies the circuit and layout design.

[0036] exist figure 1 basis, see figure 2 . figure 2 yes figure 1 A schematic di...

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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...

Claims

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Application Information

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IPC IPC(8): H03M1/12
CPCH03M1/124
Inventor 张明焦炜杰陈炳杰张琛王新安
Owner JIANGSU RUNIC TECH CO LTD
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