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公开(公告)号：US20170272089A1
公开(公告)日：2017-09-21
申请号：US15611827
申请日：2017-06-02
申请人： Maxlinear, Inc.
发明人： Jianyu Zhu
摘要： Methods and systems are provided for dynamic power switching in current-steering digital-to-analog converters (DACs). A DAC circuit may be configured to apply digital-to-analog conversions based on current steering, and to particularly incorporate use of dynamic power switching during conversions. The DAC circuit may comprise a main section, which may connect a main supply voltage to a main current source. The main section may comprise a positive-side branch and a negative-side branch, which may be configured to steer positive-side and negative-side currents, such as in a differential manner, to effectuate the conversions. The dynamic power switching may be applied, for example, via a secondary section connecting a main current source in the DAC circuit to a secondary supply voltage. The secondary supply voltage may be configured such that it may be less than the main supply voltage used in driving the current steering in the DAC circuit.
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公开(公告)号：US09148160B2
公开(公告)日：2015-09-29
申请号：US14455361
申请日：2014-08-08
申请人： MaxLinear, Inc.
发明人： Jianyu Zhu
摘要： Methods and systems are provided for dynamic power switching in current-steering digital-to-analog converters (DACs). A DAC circuit may be configured to apply digital-to-analog conversions based on current steering, and to particularly incorporate use of dynamic power switching during conversions. The DAC circuit may comprise a main section, which may connect a main supply voltage to a main current source. The main section may comprise a positive-side branch and a negative-side branch, which may be configured to steer positive-side and negative-side currents, such as in a differential manner, to effectuate the conversions. The dynamic power switching may be applied, for example, via a secondary section connecting a main current source in the DAC circuit to a secondary supply voltage. The secondary supply voltage may be configured such that it may be less than the main supply voltage used in driving the current steering in the DAC circuit.
摘要翻译： 为电流转向数模转换器（DAC）中的动态功率开关提供了方法和系统。 DAC电路可以被配置为基于当前转向来应用数模转换，并且特别地包括在转换期间使用动态功率切换。 DAC电路可以包括主部分，其可以将主电源电压连接到主电流源。 主部分可以包括正侧分支和负侧分支，其可以被配置为例如以差分方式转向正侧和负侧电流以实现转换。 动态功率切换可以例如通过将DAC电路中的主电流源连接到次级电源的次级部分来施加。 次级电源电压可以被配置为使得其可以小于用于驱动DAC电路中的电流转向的主电源电压。
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公开(公告)号：US20130241754A1
公开(公告)日：2013-09-19
申请号：US13893099
申请日：2013-05-13
CPC分类号： H03M1/66 , H03B5/1215 , H03B5/1228 , H03B5/1243 , H03B5/1265 , H03G11/008 , H03L7/093 , H03L7/099 , H03L2207/06 , H03M1/664 , H03M1/765
摘要： A circuit includes a digital-to-analog converter with non-uniform resolution for converting a digital signal into an analog signal. The digital-to-analog converter includes high-resolution circuitry, reduced-resolution circuitry coupled to the high-resolution circuitry and a switch coupled to the high-resolution circuitry and to the reduced-resolution circuitry. The switch couples one of the high-resolution circuitry and the reduced-resolution circuitry to an output node. The circuit also includes a decoder coupled to the switch. The decoder receives the digital signal to control the switch.
摘要翻译： 电路包括具有用于将数字信号转换为模拟信号的非均匀分辨率的数模转换器。 数模转换器包括高分辨率电路，耦合到高分辨率电路的低分辨率电路和耦合到高分辨率电路和降低分辨率电路的开关。 该开关将高分辨率电路和降低分辨率电路之一耦合到输出节点。 电路还包括耦合到开关的解码器。 解码器接收数字信号以控制开关。
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4.发明授权Digital-to-analog converter, analog-to-digital converter, and semiconductor device 失效数模转换器，模拟 - 数字转换器和半导体器件公开(公告)号：US08339300B2
公开(公告)日：2012-12-25
申请号：US13098206
申请日：2011-04-29
IPC分类号： H03M1/66
CPC分类号： H03M1/66 , H03M1/0863 , H03M1/123 , H03M1/34 , H03M1/56 , H03M1/664 , H03M1/687 , H03M1/745 , H03M1/747
摘要： A DA conversion device includes the following elements. A higher-bit current source cell portion includes uniformly weighted higher-bit current source cells to generate an identical constant current. A lower-bit current source cell portion includes a lower-bit current source cells that are weighted to generate 1/two-to-the-power-of-certain-numbers constant currents. A constant current source selection controller includes a lower-bit controller having a scaler that uses clocks scaled down to 1/two-to-the-power-of-certain-numbers to select the lower-bit current source cells, and a higher-bit controller having shift registers and using a signal indicating a carry bit or a borrow bit used in the lower-bit controller to sequentially activate shift outputs of the shift registers, and uses the shift outputs to select the higher-bit current source cells. Constant current outputs of the selected current source cells are added and output so that an output current corresponding to the digital input signal is obtained.
摘要翻译： DA转换装置包括以下元件。 较高位的电流源单元部分包括均匀加权的较高位电流源单元以产生相同的恒定电流。 低位电流源单元部分包括被加权以产生特定数目的恒定电流的2/2的功率的低位电流源单元。 恒定电流源选择控制器包括具有缩放器的低位控制器，该定标器使用按比例缩小到1/2到特定数目的功率的时钟来选择低位电流源单元， 位控制器具有移位寄存器并且使用指示在低位控制器中使用的进位位或借位位的信号来顺序地激活移位寄存器的移位输出，并且使用移位输出来选择较高位电流源单元。 添加并输出所选择的电流源单元的恒定电流输出，从而获得与数字输入信号相对应的输出电流。
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公开(公告)号：US20120146828A1
公开(公告)日：2012-06-14
申请号：US12964607
申请日：2010-12-09
CPC分类号： H03M1/66 , H03B5/1215 , H03B5/1228 , H03B5/1243 , H03B5/1265 , H03G11/008 , H03L7/093 , H03L7/099 , H03L2207/06 , H03M1/664 , H03M1/765
摘要： A circuit includes a digital-to-analog converter with non-uniform resolution for converting a digital signal into an analog signal. The digital-to-analog converter includes high-resolution circuitry, reduced-resolution circuitry coupled to the high-resolution circuitry and a switch coupled to the high-resolution circuitry and to the reduced-resolution circuitry. The switch couples one of the high-resolution circuitry and the reduced-resolution circuitry to an output node. The circuit also includes a decoder coupled to the switch. The decoder receives the digital signal to control the switch.
摘要翻译： 电路包括具有用于将数字信号转换为模拟信号的非均匀分辨率的数模转换器。 数模转换器包括高分辨率电路，耦合到高分辨率电路的低分辨率电路和耦合到高分辨率电路和降低分辨率电路的开关。 该开关将高分辨率电路和降低分辨率电路之一耦合到输出节点。 电路还包括耦合到开关的解码器。 解码器接收数字信号以控制开关。
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6.发明申请公开(公告)号：US20110169990A1
公开(公告)日：2011-07-14
申请号：US13050470
申请日：2011-03-17
申请人： Masahiro HIGUCHI , Hiroshi Kimura
发明人： Masahiro HIGUCHI , Hiroshi Kimura
摘要： A linear relationship is established between a gain control signal and an amplification factor (value in dB). Described is a current generation circuit including a first current output section which outputs a first current, a second current output section which outputs a second current proportional to the first current, and a variable-current control section which generates a third current proportional to the first current, divides the third current into a fourth current and a fifth current according to a first control signal, and outputs the fourth and the fifth currents. The current generation circuit outputs a sum of the first and the fourth currents as a reference current, and a sum of the second and the fifth currents as an output current.
摘要翻译： 在增益控制信号和放大系数之间建立线性关系（以dB为单位）。 描述了包括输出第一电流的第一电流输出部分，输出与第一电流成比例的第二电流的第二电流输出部分的电流产生电路和产生与第一电流成比例的第三电流的可变电流控制部分 电流，根据第一控制信号将第三电流分成第四电流和第五电流，并输出第四和第五电流。 电流产生电路输出第一和第四电流的和作为参考电流，并且输出第二和第五电流的和作为输出电流。
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7.发明申请VOLTAGE GENERATOR CIRCUIT, DIGITAL-TO-ANALOG CONVERTER, RAMP GENERATOR CIRCUIT, ANALOG-TO-DIGITAL CONVERTER, IMAGE SENSOR SYSTEM, AND METHOD FOR GENERATING VOLTAGE 有权电压发生器电路，数字到模拟转换器，放大器发生器电路，模拟数字转换器，图像传感器系统和产生电压的方法公开(公告)号：US20110114827A1
公开(公告)日：2011-05-19
申请号：US13012600
申请日：2011-01-24
申请人： Yuusuke YAMAOKA , Kazuko Nishimura
发明人： Yuusuke YAMAOKA , Kazuko Nishimura
摘要： A resistor-ladder voltage generator circuit is provided, which controls so that k switches among consecutive (k+1) switches out of a plurality of switches connected to the resistor ladder circuit are simultaneously set to an ON state, and which temporally switches the value of k. This allows voltage waveforms having different slopes to be arbitrarily obtained, ranging from a voltage waveform having a small slope to a voltage waveform having a large slope, thereby improving the resolution of a generated voltage waveform without increasing the numbers of resistors and switches, while A/D conversion time is not increased even if the number of bits is increased. In addition, by using this voltage generator circuit as a ramp generator circuit, and by dynamically switching the slope of the ramp wave, acceleration of an image sensor is achieved.
摘要翻译： 提供了一种电阻梯形电压发生器电路，其控制使得连接到电阻梯形电路的多个开关中的连续（k + 1）个开关中的k个开关同时被设置为导通状态，并且其在时间上切换值 的k。 这允许从具有小斜率的电压波形到具有大斜率的电压波形的任意地获得具有不同斜率的电压波形，从而在不增加电阻器和开关的数量的情况下提高所产生的电压波形的分辨率，而A 即使比特数增加，D / D转换时间也不会增加。 此外，通过使用该电压发生器电路作为斜坡发生电路，通过动态切换斜波的斜率，实现图像传感器的加速。
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8.发明授权Digital-to-analog converter, analog-to-digital converter, and semiconductor device 失效数模转换器，模拟 - 数字转换器和半导体器件公开(公告)号：US07324033B2
公开(公告)日：2008-01-29
申请号：US11526512
申请日：2006-09-25
IPC分类号： H03M1/66
CPC分类号： H03M1/66 , H03M1/0863 , H03M1/123 , H03M1/34 , H03M1/56 , H03M1/664 , H03M1/687 , H03M1/745 , H03M1/747
摘要： A DA conversion device includes the following elements. A higher-bit current source cell portion includes uniformly weighted higher-bit current source cells to generate an identical constant current. A lower-bit current source cell portion includes a lower-bit current source cells that are weighted to generate 1/two-to-the-power-of-certain-numbers constant currents. A constant current source selection controller includes a lower-bit controller having a scaler that uses clocks scaled down to 1/two-to-the-power-of-certain-numbers to select the lower-bit current source cells, and a higher-bit controller having shift registers and using a signal indicating a carry bit or a borrow bit used in the lower-bit controller to sequentially activate shift outputs of the shift registers, and uses the shift outputs to select the higher-bit current source cells. Constant current outputs of the selected current source cells are added and output so that an output current corresponding to the digital input signal is obtained.
摘要翻译： DA转换装置包括以下元件。 较高位的电流源单元部分包括均匀加权的较高位电流源单元以产生相同的恒定电流。 低位电流源单元部分包括被加权以产生特定数目的恒定电流的2/2的功率的低位电流源单元。 恒定电流源选择控制器包括具有缩放器的低位控制器，该定标器使用按比例缩小到1/2到特定数目的功率的时钟来选择低位电流源单元， 位控制器具有移位寄存器并且使用指示在低位控制器中使用的进位位或借位位的信号来顺序地激活移位寄存器的移位输出，并且使用移位输出来选择较高位电流源单元。 添加并输出所选择的电流源单元的恒定电流输出，从而获得与数字输入信号相对应的输出电流。
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公开(公告)号：US20060077142A1
公开(公告)日：2006-04-13
申请号：US11229127
申请日：2005-09-15
申请人： Oh-Kyong Kwon
发明人： Oh-Kyong Kwon
IPC分类号： G09G3/30
CPC分类号： H03M1/664 , G09G3/3208 , G09G3/3283 , G09G2310/027 , G09G2320/0276 , H03M1/0607 , H03M1/687
摘要： A digital/analog (D/A) converter, a light emitting display device using the converter, and a display panel and a driving method thereof. The display device according to an exemplary embodiment of the present invention includes: a display unit having a plurality of data lines for transmitting data currents, a plurality of scan lines for transmitting selection signals, and a plurality of pixel areas defined by the data lines and the scan lines; a data driver for dividing a plurality of grayscale data having a first data and a second data into at least two grayscale sections, converting the grayscale data into a data current, and applying the data current to a data line; and a scan driver for sequentially applying the selection signals to the plurality of scan lines.
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公开(公告)号：US06801149B2
公开(公告)日：2004-10-05
申请号：US10425024
申请日：2003-04-28
IPC分类号： H03M166
摘要： A switched capacitor digital/analog converter is provided for performing non-linear conversion. An input receives an n bit digital word for conversion. The individual bits of the input word control electronic switches which switch the plates of n capacitors between upper and lower reference voltages. The capacitors have values C0, . . . Cn−1 such that Cx
摘要翻译： 提供开关电容数字/模拟转换器用于执行非线性转换。 输入接收n位数字字用于转换。 输入字控制电子开关的各个位将n个电容器的板切换到上参考电压和下参考电压之间。 电容器的值为C0，。 。 。 Cn-1，使得对于大于-1且小于（n-1）的每个整数x，Cx
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