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    ANALOG TO DIGITAL CONVERSION CIRCUIT
    2.
    发明申请
    ANALOG TO DIGITAL CONVERSION CIRCUIT 有权

    公开(公告)号：US20170194979A1

    公开(公告)日：2017-07-06

    申请号：US15371101

    申请日：2016-12-06

    Applicant: Renesas Electronics Corporation

    Inventor： Yoshihiro FUNATO ,  Yasuo MORIMOTO ,  Kazuaki KUROOKA

    IPC: H03M1/06 ,  H03M1/12 ,  H03M1/10

    CPC classification number: H03M1/0617 ,  H03M1/1023 ,  H03M1/1038 ,  H03M1/1057 ,  H03M1/12 ,  H03M1/145

    Abstract: During a period of calibration of the ADC, the effect of unexpected external noise can be excluded.Provided is an analog to digital convertor including: an ADC that converts an analog value into a digital value; and an averaging circuit that calculates a correction value by a calibration operation. The converted value is corrected and output using the correction value being held in a normal operation. The analog to digital convertor is configured as follows. In the calibration operation, an elemental correction value on the basis of a converted value by the ADC corresponding to a predetermined analog value is supplied to the averaging circuit. The averaging circuit calculates the average value of the remaining elemental correction values obtained by removing the maximum value and the minimum value from the elemental correction values supplied a plurality of times, and calculates the correction value on the basis of the average value.

    ANALOG TO DIGITAL CONVERSION CIRCUIT
    3.
    发明申请
    ANALOG TO DIGITAL CONVERSION CIRCUIT 审中-公开

    公开(公告)号：US20170272088A1

    公开(公告)日：2017-09-21

    申请号：US15615719

    申请日：2017-06-06

    Applicant: Renesas Electronics Corporation

    Inventor： Yoshihiro FUNATO ,  Yasuo MORIMOTO ,  Kazuaki KUROOKA

    IPC: H03M1/06 ,  H03M1/10 ,  H03M1/12

    CPC classification number: H03M1/0617 ,  H03M1/1023 ,  H03M1/1038 ,  H03M1/1057 ,  H03M1/12 ,  H03M1/145

    Abstract: An analog-to-digital (AD) convertor includes: a capacitance digital-to-analog (DA) convertor circuit; a comparator circuit coupled to the capacitance DA convertor circuit; and a calibration circuit that calculates a correction value for the AD convertor, wherein the capacitance DA convertor circuit includes a first capacitor, a second capacitor, n number of capacitors (n being integer equal to or larger than 3), each of the capacitors from first to n-th to be activated based on input digital data, wherein each of the first and second capacitors is designed for having a first capacitance value, wherein the n-th capacitor is designed for having twice the capacitance value of the (n−1)-th capacitor, wherein the calibration circuit calculates the correction value based on first and second results of the AD convertor, and wherein the first result is generated using the n-th capacitor and the second result is generated using the capacitors from first to (n−1)-th.

    Semiconductor Device
    4.
    发明申请
    Semiconductor Device 审中-公开

    公开(公告)号：US20180323797A1

    公开(公告)日：2018-11-08

    申请号：US16031872

    申请日：2018-07-10

    Applicant: Renesas Electronics Corporation

    Inventor： Kazuaki KUROOKA ,  Yoshihiro FUNATO

    IPC: H03M1/48 ,  H03M1/08 ,  H03M1/64

    CPC classification number: H03M1/485 ,  H03M1/0872 ,  H03M1/645

    Abstract: In a semiconductor device, a sine wave signal is input to a first input part and a cosine wave signal is input to a second input part. A multiplexer alternately selects one of the sine wave signal and the cosine wave signal. An analog to digital converter converts the output signal of the multiplexer into a digital value. A switching circuit is coupled between at least one of the first and second input parts and the multiplexer. The switching circuit is configured to be able to invert the input sine wave signal or the input cosine wave signal, in order to reduce the angle detection error due to the non-linearity error of the A/D converter.

    Semiconductor Device
    7.
    发明申请
    Semiconductor Device 审中-公开
    半导体器件

    公开(公告)号：US20160226508A1

    公开(公告)日：2016-08-04

    申请号：US14991978

    申请日：2016-01-10

    Applicant: Renesas Electronics Corporation

    Inventor： Kazuaki KUROOKA ,  Yoshihiro FUNATO

    IPC: H03M1/48 ,  H03M1/64

    CPC classification number: H03M1/485 ,  H03M1/0872 ,  H03M1/645

    Abstract: In a semiconductor device, a sine wave signal is input to a first input part and a cosine wave signal is input to a second input part. A multiplexer alternately selects one of the sine wave signal and the cosine wave signal. An analog to digital converter converts the output signal of the multiplexer into a digital value. A switching circuit is coupled between at least one of the first and second input parts and the multiplexer. The switching circuit is configured to be able to invert the input sine wave signal or the input cosine wave signal, in order to reduce the angle detection error due to the non-linearity error of the A/D converter.

    Abstract translation: 在半导体装置中，将正弦波信号输入到第一输入部，将余弦波信号输入到第二输入部。 多路复用器交替地选择正弦波信号和余弦波信号之一。 模数转换器将多路复用器的输出信号转换为数字值。 开关电路耦合在第一和第二输入部分中的至少一个和多路复用器之间。 开关电路被配置为能够反转输入正弦波信号或输入余弦波信号，以便减小由于A / D转换器的非线性误差引起的角度检测误差。

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