A Continuous Time δ-ς Analog-to-Digital Converter and Its Coefficient Calibration Method

Abstract

Disclosed are a continuous time analogue-to-digital converter and a coefficient calibration method therefor, and a storage medium. A continuous time Δ-Σ analogue-to-digital converter at least comprises: a voltage comparator and a digital controller. The method comprises: in a pre-set calibration mode, a voltage comparator comparing a pre-acquired first calibration signal with a pre-set reference signal; and according to a comparison result of the first calibration signal and the reference signal, and a pre-set calibration parameter, a digital controller calibrating all pre-set coefficients, which are to be calibrated, in a continuous time Δ-Σ analogue-to-digital converter, wherein the comparison result comprises a high-level signal or a low-level signal.

Description

technical field [0001] The invention relates to the technical field of integrated circuit design, in particular to a continuous time delta-sigma analog-to-digital converter and a coefficient calibration method thereof. Background technique [0002] In many electronic applications, analog input signals are converted to digital output signals. For example, in a precision measurement system, the electronics are set up with one or more sensors to take measurements, and these sensors can generate an analog signal that is then provided to the input of an analog-to-digital converter (ADC) to generate a digital Output signal for further processing. [0003] In wireless communication applications, delta-sigma analog-to-digital converters include: continuous-time delta-sigma analog-to-digital converters and discrete-time delta-sigma analog-to-digital converters. Compared with the discrete-time delta-sigma ADC, the continuous-time delta-sigma ADC can digitize its input analog signal ...

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Problems solved by technology

[0008] The existing continuous time delta-sigma analog-to-digital converter coefficient calibration methods all need a calibration circuit independent of the continuous time delta-sigma analog-to-digital converter, and the deviation of the device in the calibration circuit and the continuous time delta-sigma analog-to-digital conversion The main circuit of the converter is not completely consistent, which not only makes it difficult to guarantee the calibration accuracy of the coefficients of the continuous-time delta-sigma analog-to-digital converter, but also increases the production cost of the continuous-time delta-sigma analog-to-digital converter

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