US 2025/0158627 A1Published application

High-speed and high-precision analog-to-digital converter and analog-to-digital converter performance improvement method

AssigneesChongqing GigaChip Technology Co., Ltd., No.24 Research Institute of China Electronics Technology Group Corporation

InventorsTing LI, Ruzhang LI, Yong ZHANG, Yabo NI, Liang LI, Dongbing FU, Jianan WANG, Guangbing CHEN

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Abstract

An analog-to-digital converter includes an input configuration module, an analog-to-digital conversion module, an adaptive parameter extraction module, and a full-period data restoration module. In a parameter extraction working mode, correction parameters are extracted through cooperation of the input configuration module, the analog-to-digital conversion module, the adaptive parameter extraction module, and the full-period data restoration module. In a normal working mode, digital calibration and correction of digital signals are implemented by using the analog-to-digital conversion module and the correction parameters. The correction parameters include a dither correction parameter, a gain correction parameter, and a mismatch error correction parameter.

Claims12

Dependent claims

A high-speed and high-precision analog-to-digital converter, comprising an input configuration module, an analog-to-digital conversion module, an adaptive parameter extraction module, and a full-period data restoration module, wherein

the adaptive parameter extraction module is configured to send a configuration control signal to the input configuration module, and the input configuration module is configured to generate an analog signal, quantization control signals, and an output mode control signal under control of the configuration control signal;
the analog-to-digital conversion module is configured to receive the analog signal, the quantization control signals and the output mode control signal and perform analog-to-digital conversion on the analog signal to obtain digital signals, and under control of the quantization control signals and the output mode control signal, the analog-to-digital conversion module is further configured to rearrange the digital signals to obtain rearranged digital signals when the high-speed and high-precision analog-to-digital converter is in a parameter extraction working mode, and configured to calibrate the digital signals based on correction parameters to obtain corrected digital signals when the high-speed and high-precision analog-to-digital converter is in a normal working mode;
the adaptive parameter extraction module is configured to send output data mode information to the full-period data restoration module, and the full-period data restoration module is configured to receive the output data mode information and the rearranged digital signals, and restore the rearranged digital signals to full-period data based on the output data mode information, to obtain and output full-period rearranged digital signals;
the adaptive parameter extraction module is configured to receive the full-period rearranged digital signals, extract the correction parameters from the full-period rearranged digital signals by using an adaptive parameter extraction method, and then send the correction parameters to a parameter memory inside the analog-to-digital converter for storage;
and
the correction parameters comprise at least a dither correction parameter, a gain correction parameter, and a mismatch error correction parameter.

3 more elements

An analog-to-digital converter performance improvement method, comprising:

providing an analog-to-digital converter, adding a random number generation circuit and an analog random signal generation circuit to the analog-to-digital converter, generating, by using the random number generation circuit and the analog random signal generation circuit, a plurality of random analog signals, and injecting dithers into the analog-to-digital converter by using the plurality of random analog signals;
adding an input configuration module, a data rearrangement unit, a full-period data restoration module, and an adaptive parameter extraction module to the analog-to-digital converter, and extracting correction parameters of each stage of quantization circuit in the analog-to-digital converter through cooperation of the input configuration module, the data rearrangement unit, the full-period data restoration module, and the adaptive parameter extraction module;
adding a parameter memory to the analog-to-digital converter, and storing, by using the parameter memory, the correction parameters, wherein the parameter memory performs one-time storage on the correction parameters in a test extraction phase, and the parameter memory performs solidification storage on the correction parameters after a test passes;
and
adding a digital calibration unit to the analog-to-digital converter, and calibrating and correcting, in the digital calibration unit based on the correction parameters stored in the parameter memory, digital signals obtained through analog-to-digital conversion of the analog-to-digital converter, to obtain corrected digital signals for implementing digital calibration, wherein
the correction parameters comprise at least a dither correction parameter, a gain correction parameter, and a mismatch error correction parameter.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 19/026,465Filed 17 Jan 2025
Priority: CN 202211735360.731 Dec 2022
Published: 15 May 2025
Term ends: Not estimatedThe source records don’t support an estimate.

Classification3 codes

H03M 1/1014
Calibration: at one point of the transfer characteristic, i.e. by adjusting a single reference value, e.g. bias or gain error
H03M 1/0604
Of deviations from the desired transfer characteristic: at one point, i.e. by adjusting a single reference value, e.g. bias or gain error
H03M
Coding

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Application19/026,465Continuation
US 2025/0158627 A1This patent

From the US filing history. Foreign family members aren’t listed.

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