Continuous third-order sigma-delta modulator circuit based on active resistor-capacitor integrator

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, and in particular to a continuous three-order sigma-delta modulator circuit based on an active resistance-capacitance integrator. Background technique [0002] In recent years, wearable medical electronic equipment for biomedicine and sensor interface circuits for the Internet of Things have been more and more widely studied and applied. Due to the high precision and large dynamics of the sigma-delta structure analog-to-digital converter The range and other excellent characteristics have made it widely concerned in the fields of biomedical electronics. [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 sigma-delta structure of the analog-to-digital converter. At present, the power consumption of the analog-to-digital converter of the sigma-delta structure is still relatively h...

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

Images