Multi-bit sigma-delta modulator and digital-to-analog converter with one digital-to-analog capacitor
    1.
    发明申请
    Multi-bit sigma-delta modulator and digital-to-analog converter with one digital-to-analog capacitor 有权
    多位Σ-Δ调制器和具有一个数模转换器的数/模转换器

    公开(公告)号:US20070126615A1

    公开(公告)日:2007-06-07

    申请号:US11588455

    申请日:2006-10-27

    IPC分类号: H03M1/66

    CPC分类号: H03M3/352 H03M3/424 H03M3/464

    摘要: A digital-to-analog converter (DAC) for a sigma-delta modulator is provided. The DAC has a switched capacitor structure using an operational amplifier (OP amp) and performs a function exceeding 3-level using a switching method employing only one capacitor in single ended form. Thus, DAC non-linearity caused by capacitor mismatching does not occur, and the number of output levels of the DAC is increased. Also, the DAC capacitor may be applied to a general DAC to increase the ratio of DAC output levels to capacitors.

    摘要翻译: 提供了一种用于Σ-Δ调制器的数模转换器(DAC)。 DAC具有使用运算放大器(OP放大器)的开关电容器结构,并且使用仅采用单端形式的一个电容器的开关方法来执行超过3电平的功能。 因此,不会发生由电容器失配引起的DAC非线性,并且DAC的输出电平的数量增加。 此外,DAC电容器可以被施加到通用DAC以增加DAC输出电平与电容器的比率。

    DYNAMIC ELEMENT-MATCHING METHOD, MULTI-BIT DAC USING THE METHOD, AND DELTA-SIGMA MODULATOR AND DELTA-SIGMA DAC INCLUDING THE MULTI-BIT DAC
    2.
    发明申请
    DYNAMIC ELEMENT-MATCHING METHOD, MULTI-BIT DAC USING THE METHOD, AND DELTA-SIGMA MODULATOR AND DELTA-SIGMA DAC INCLUDING THE MULTI-BIT DAC 有权
    使用该方法的动态元件匹配方法,多位DAC,以及包括多位DAC的DELTA-SIGMA调制器和DELTA-SIGMA DAC

    公开(公告)号:US20090121909A1

    公开(公告)日:2009-05-14

    申请号:US12195232

    申请日:2008-08-20

    IPC分类号: H03M3/00 H03M1/66 H03M1/80

    摘要: Provided are a dynamic element-matching method, a multi-bit Digital-to-Analog Converter (DAC), and a delta-sigma modulator with the multi-bit DAC and delta-sigma DAC with the multi-bit DAC. The dynamic element-matching method relates to preventing periodic signal components (in-band tones) from being generated from a delta-sigma modulator of a delta-sigma Analog-to-Digital Converter (ADC) and a multi-bit DAC used in a delta-sigma DAC. Unit elements are selected in a new sequence according to a simple algorithm every time that each of unit elements is selected once, and thus the unit elements are not periodically used. Consequently, it is possible to prevent in-band tones caused by a conventional Data Weighted Averaging (DWA) algorithm.

    摘要翻译: 提供了动态元件匹配方法,多位数模转换器(DAC)和具有多位DAC的多位DAC和Δ-ΣDAC的Δ-Σ调制器。 动态元件匹配方法涉及防止从Δ-Σ模数转换器(ADC)的delta-sigma调制器和用于在A-Sigma模数转换器(ADC)中使用的多位DAC的周期性信号分量(带内音调) Δ-ΣDAC。 每次选择一个单位元素一次时,根据简单算法以新的顺序选择单位元素,因此单位元素不被周期性地使用。 因此,可以防止由传统的数据加权平均(DWA)算法引起的带内音调。

    Dynamic element-matching method, multi-bit DAC using the method, and delta-sigma modulator and delta-sigma DAC including the multi-bit DAC
    4.
    发明授权
    Dynamic element-matching method, multi-bit DAC using the method, and delta-sigma modulator and delta-sigma DAC including the multi-bit DAC 有权
    动态元件匹配方法,使用该方法的多位DAC,以及包括多位DAC的Δ-Σ调制器和Δ-ΣDAC

    公开(公告)号:US07719455B2

    公开(公告)日:2010-05-18

    申请号:US12195232

    申请日:2008-08-20

    IPC分类号: H03M1/66

    摘要: Provided are a dynamic element-matching method, a multi-bit Digital-to-Analog Converter (DAC), and a delta-sigma modulator with the multi-bit DAC and delta-sigma DAC with the multi-bit DAC. The dynamic element-matching method relates to preventing periodic signal components (in-band tones) from being generated from a delta-sigma modulator of a delta-sigma Analog-to-Digital Converter (ADC) and a multi-bit DAC used in a delta-sigma DAC. Unit elements are selected in a new sequence according to a simple algorithm every time that each of unit elements is selected once, and thus the unit elements are not periodically used. Consequently, it is possible to prevent in-band tones caused by a conventional Data Weighted Averaging (DWA) algorithm.

    摘要翻译: 提供了动态元件匹配方法,多位数模转换器(DAC)和具有多位DAC的多位DAC和Δ-ΣDAC的Δ-Σ调制器。 动态元件匹配方法涉及防止从Δ-Σ模数转换器(ADC)的delta-sigma调制器和用于在A-Sigma模数转换器(ADC)中使用的多位DAC的周期性信号分量(带内音调) Δ-ΣDAC。 每次选择一个单位元素一次时,根据简单算法以新的顺序选择单位元素,因此单位元素不被周期性地使用。 因此,可以防止由传统的数据加权平均(DWA)算法引起的带内音调。

    Reference current generator
    5.
    发明授权
    Reference current generator 有权
    参考电流发生器

    公开(公告)号:US07375504B2

    公开(公告)日:2008-05-20

    申请号:US11299188

    申请日:2005-12-09

    IPC分类号: G05F3/16

    CPC分类号: G05F3/30 G05F3/262

    摘要: Provided is a low-reference-current generator that includes a circuit employing two feedback loops enabling it to operate even at a low voltage, has a high power supply rejection ratio (PSRR) to control power supply noise, and simply forms a voltage without a voltage-to-current converter used in a conventional general reference current generator. The reference current generator includes: a first voltage generator receiving a predetermined current and generating a first voltage that decreases as temperature increases; a second voltage generator generating a second voltage that increases as temperature increases; a first current generator generating a first current corresponding to the first voltage; a second current generator generating a second current corresponding to the second voltage; and a reference current generator receiving the first current and the second current and generating a reference current that is the sum of the first current and the second current.

    摘要翻译: 提供了一种低参考电流发生器,其包括使用两个反馈回路的电路,使得其能够在低电压下操作,具有高电源抑制比(PSRR)以控制电源噪声,并且简单地形成不具有 用于常规通用参考电流发生器的电压 - 电流转换器。 参考电流发生器包括:接收预定电流并产生随温度升高而降低的第一电压的第一电压发生器; 产生随着温度升高而增加的第二电压的第二电压发生器; 产生对应于第一电压的第一电流的第一电流发生器; 产生对应于第二电压的第二电流的第二电流发生器; 以及参考电流发生器,接收第一电流和第二电流,并产生作为第一电流和第二电流之和的参考电流。

    PULSE GENERATOR AND CONTINUOUS-TIME SIGMA-DELTA MODULATOR
    6.
    发明申请
    PULSE GENERATOR AND CONTINUOUS-TIME SIGMA-DELTA MODULATOR 有权
    脉冲发生器和连续时间信号调制器

    公开(公告)号:US20100156686A1

    公开(公告)日:2010-06-24

    申请号:US12509152

    申请日:2009-07-24

    IPC分类号: H03M3/02

    摘要: Provided is a clock generator employed in a continuous-time sigma-delta modulator. The clock generator includes an oscillator configured to generate pulses in response to an enable signal, a counter configured to count the number of pulses generated by the oscillator and output the total pulse count, and an output circuit configured to output an inactivated output signal if the pulse count of the counter is equal to a pulse-width control bit. The oscillator includes an astable multi-vibrator. Since the astable multi-vibrator capable of generating a low-jitter pulse from a jittered clock is used as the oscillator, a signal-to-noise ratio is improved. A simple configuration using only digital circuits makes it easier to design a circuit and adjust pulse width. Moreover, according to the structure of the astable multi-vibrator, it is possible to design a circuit to optimally modulate pulse width in connection with process variations of resistors and capacitors used in the continuous-time sigma-delta modulator.

    摘要翻译: 提供了一种在连续时间Σ-Δ调制器中使用的时钟发生器。 所述时钟发生器包括被配置为响应于使能信号产生脉冲的振荡器,被配置为对所述振荡器产生的脉冲数进行计数并输出所述总脉冲计数的计数器;以及输出电路,其配置为:如果 计数器的脉冲计数等于脉冲宽度控制位。 该振荡器包括一个不稳定的多重振动器。 由于能够从抖动时钟产生低抖动脉冲的不稳定的多重振动器被用作振荡器,所以提高了信噪比。 仅使用数字电路的简单配置使得更容易设计电路并调整脉冲宽度。 此外,根据不稳定的多振子的结构,可以设计电路,以便在连续时间Σ-Δ调制器中使用的电阻器和电容器的工艺变化方面最佳地调制脉冲宽度。

    Active resistance-capacitor integrator and continuous-time sigma-delta modulator with gain control function
    7.
    发明授权
    Active resistance-capacitor integrator and continuous-time sigma-delta modulator with gain control function 有权
    有源电阻电容积分器和具有增益控制功能的连续时间Σ-Δ调制器

    公开(公告)号:US08199038B2

    公开(公告)日:2012-06-12

    申请号:US12843591

    申请日:2010-07-26

    IPC分类号: H03M3/00

    摘要: Provided are an active resistance-capacitance (RC) integrator and a continuous-time sigma-delta modulator, which have a gain control function. The active RC integrator includes an amplifier, a first base resistor connected between a first input node and a positive input port of the amplifier, a second base resistor connected between a second input node and a negative input port of the amplifier, a first resistor unit connected between the second input node and the positive input port of the amplifier, and a second resistor unit connected between the first input node and the negative input port of the amplifier. A resistor network including resistors and switches is configured to vary an input resistance, so that an active RC integrator may have a gain control function.

    摘要翻译: 提供了具有增益控制功能的有源电阻 - 电容(RC)积分器和连续时间Σ-Δ调制器。 有源RC积分器包括放大器,连接在放大器的第一输入节点和正输入端口之间的第一基极电阻器,连接在放大器的第二输入节点和负输入端口之间的第二基极电阻器,第一电阻器单元 连接在放大器的第二输入节点和正输入端口之间,以及连接在放大器的第一输入节点和负输入端口之间的第二电阻器单元。 包括电阻器和开关的电阻器网络被配置为改变输入电阻,使得有源RC积分器可以具有增益控制功能。

    Pulse generator and continuous-time sigma-delta modulator
    8.
    发明授权
    Pulse generator and continuous-time sigma-delta modulator 有权
    脉冲发生器和连续时间Σ-Δ调制器

    公开(公告)号:US07961128B2

    公开(公告)日:2011-06-14

    申请号:US12509152

    申请日:2009-07-24

    IPC分类号: H03M3/00

    摘要: Provided is a clock generator employed in a continuous-time sigma-delta modulator. The clock generator includes an oscillator configured to generate pulses in response to an enable signal, a counter configured to count the number of pulses generated by the oscillator and output the total pulse count, and an output circuit configured to output an inactivated output signal if the pulse count of the counter is equal to a pulse-width control bit. The oscillator includes an astable multi-vibrator. Since the astable multi-vibrator capable of generating a low-jitter pulse from a jittered clock is used as the oscillator, a signal-to-noise ratio is improved. A simple configuration using only digital circuits makes it easier to design a circuit and adjust pulse width. Moreover, according to the structure of the astable multi-vibrator, it is possible to design a circuit to optimally modulate pulse width in connection with process variations of resistors and capacitors used in the continuous-time sigma-delta modulator.

    摘要翻译: 提供了一种在连续时间Σ-Δ调制器中使用的时钟发生器。 所述时钟发生器包括被配置为响应于使能信号产生脉冲的振荡器,被配置为对所述振荡器产生的脉冲数进行计数并输出所述总脉冲计数的计数器;以及输出电路,其配置为:如果 计数器的脉冲计数等于脉冲宽度控制位。 该振荡器包括一个不稳定的多重振动器。 由于能够从抖动时钟产生低抖动脉冲的不稳定的多重振动器被用作振荡器,所以提高了信噪比。 仅使用数字电路的简单配置使得更容易设计电路并调整脉冲宽度。 此外,根据不稳定的多振子的结构,可以设计电路,以便在连续时间Σ-Δ调制器中使用的电阻器和电容器的工艺变化方面最佳地调制脉冲宽度。

    Dynamically linearized digital-to-analog converter
    9.
    发明申请
    Dynamically linearized digital-to-analog converter 审中-公开
    动态线性化数模转换器

    公开(公告)号:US20070126616A1

    公开(公告)日:2007-06-07

    申请号:US11591740

    申请日:2006-11-02

    IPC分类号: H03M1/66

    CPC分类号: H03M1/0673 H03M1/742

    摘要: Provided is a digital-to-analog converter converting a digital signal into an analog signal. The digital-to-analog converter includes a decoder for selecting a current source from digital inputs, a current switch driver for driving a current switch of the current source, and a random selection switch disposed between the decoder and the current switch driver, and randomly resetting a connection relationship between outputs of the decoder and inputs of the current switch driver every clock. According to the present invention, the linearity of the digital-to-analog converter may be enhanced by changing the current source selected every clock signal to compensate for non-linearity of the digital-to-analog converter according to the spatial arrangement of the current sources.

    摘要翻译: 提供了将数字信号转换为模拟信号的数模转换器。 数模转换器包括用于从数字输入端选择电流源的解码器,用于驱动电流源的电流开关的电流开关驱动器,以及设置在解码器和电流开关驱动器之间的随机选择开关,以及随机 在每个时钟复位解码器的输出和当前开关驱动器的输入之间的连接关系。 根据本发明,可以通过改变每个时钟信号选择的电流源来增强数模转换器的线性度,以根据电流的空间布置补偿数模转换器的非线性 来源。

    High-speed asynchronous digital signal level conversion circuit
    10.
    发明授权
    High-speed asynchronous digital signal level conversion circuit 失效
    高速异步数字信号电平转换电路

    公开(公告)号:US07663403B2

    公开(公告)日:2010-02-16

    申请号:US11943031

    申请日:2007-11-20

    IPC分类号: H03K19/0175

    CPC分类号: H03K19/018528 H03K19/0948

    摘要: Provided is a high-speed asynchronous digital signal level conversion circuit converting an input signal of a first voltage level into a signal of a second voltage level. The conversion circuit is able to operate at high speed by connecting first and second nodes, at which the input signal of the first voltage level is converted to the signal of the second voltage level, to a second power source voltage of the second voltage level for fast voltage level conversion when the voltage level of the input signal is changed.

    摘要翻译: 提供了将第一电压电平的输入信号转换为第二电压电平的信号的高速异步数字信号电平转换电路。 转换电路能够通过将第一和第二节点(第一电压电平的输入信号被转换为第二电压电平的信号)连接到第二电压电平的第二电源电压, 当输入信号的电压电平改变时,进行快速电压电平转换。