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Continuous 3-order sigma-delta modulator circuit based on active resistance-capacitance integrator

A technique of integrator and modulator

Active Publication Date: 2017-06-13
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the power consumption of the analog-to-digital converter with the sigma-delta structure is still relatively high, thus limiting its large-scale application in ultra-low power wearable devices

Method used

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  • Continuous 3-order sigma-delta modulator circuit based on active resistance-capacitance integrator
  • Continuous 3-order sigma-delta modulator circuit based on active resistance-capacitance integrator
  • Continuous 3-order sigma-delta modulator circuit based on active resistance-capacitance integrator

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Embodiment 1

[0050] See figure 1 , figure 1 A schematic structural diagram of a continuous third-order sigma-delta modulator circuit 11 based on an active resistance-capacitance integrator provided for an embodiment of the present invention, as shown in figure 1 , the circuit consists of:

[0051] First integrator (111), second integrator (112), comparator (113), first flip-flop (114), second flip-flop (115), first digital-to-analog converter (116), second A digital-to-analog converter (117), a third digital-to-analog converter (118), a fourth digital-to-analog converter (119), a logical OR circuit (120), a first inverter (121) and a second inverter ( 122);

[0052] Wherein, the positive and negative input terminals of the first integrator (111) are respectively electrically connected to the first differential input terminal (Vin+) and the second differential input terminal (Vin-); the positive and negative input terminals of the second integrator (112) are respectively electrically con...

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Abstract

The invention relates to a continuous 3-order sigma-delta modulator circuit (11) based on an active resistance-capacitance integrator. The circuit comprises a first integrator (111), a second integrator (112), a comparator (113), a first trigger (114), a second trigger (115), a first digital to analog converter (116), a second digital to analog converter (117), a third digital to analog converter (118), a fourth digital to analog converter (119), a logical OR circuit (120), a first inverter (121) and a second inverter (122). By adopting the circuit disclosed by the invention, the power consumption of the circuit can be significantly reduced.

Description

technical field [0001] The invention relates to the field of electronic components, in particular to a continuous third-order sigma-delta modulator circuit based on an active resistance-capacitance integrator. Background technique [0002] In recent years, wearable medical electronic devices for biomedicine and sensor interface circuits for the Internet of Things have been more and more widely researched and applied. Due to the high precision and large dynamic The excellent characteristics such as range make it widely concerned in the field of biomedical electronics and other fields. [0003] Among them, the sigma-delta modulator is the core circuit module of the sigma-delta analog-to-digital converter, which greatly affects the overall performance of the analog-to-digital converter with the sigma-delta structure. Currently, the power consumption of the analog-to-digital converter with the sigma-delta structure is still relatively high, thus limiting its large-scale applica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M3/00
CPCH03M3/32H03M3/39
Inventor 白文彬苏伟鑫王亦菲朱樟明李亚妮
Owner XIDIAN UNIV
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