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    ANALOG-TO-DIGITAL CONVERTER AND INTER-STAGE GAIN CALIBRATION METHOD
    8.
    发明公开
    ANALOG-TO-DIGITAL CONVERTER AND INTER-STAGE GAIN CALIBRATION METHOD 审中-实审

    公开(公告)号：EP4391388A9

    公开(公告)日：2024-08-07

    申请号：EP22879792.4

    申请日：2022-03-21

    申请人： Sanechips Technology Co., Ltd.

    发明人： CHEN, Xiao

    IPC分类号： H03M1/10

    CPC分类号： H03M1/10 ,  H03M1/12 ,  H03M1/164 ,  H03M1/1215

    摘要： Provided in the present application are an analog-to-digital converter and an inter-stage gain calibration method. The analog-to-digital converter comprises a sampling and holding circuit, which is configured to periodically sample and hold an analog input signal; a first-stage analog-to-digital sub-converter, which is configured to convert the analog input signal into a first digital signal, convert the first digital signal into a first voltage signal, and process a difference between the analog input signal and the first voltage signal, so as to obtain a second voltage signal; a first processing circuit, which is configured to perform clock synchronization and period delay on the first digital signal, so as to obtain a second digital signal; an inter-stage amplifier, which is realized by using an open-loop structure, and is configured to amplify the second voltage signal to obtain a third voltage signal; a second-stage analog-to-digital sub-converter, which is configured to convert the third voltage signal into a third digital signal; a second processing circuit, which is configured to perform clock synchronization on the third digital signal, so as to obtain a fourth digital signal; and an adder, which is configured to combine and add the second digital signal as a high-bit codeword and the fourth digital signal as a low-bit codeword, so as to obtain a digital output signal.