公开(公告)号：US20090243904A1

公开(公告)日：2009-10-01

申请号：US12076876

申请日：2008-03-25

Applicant: DA-HUEI LEE ,  TAI-HAUR KUO

Inventor： DA-HUEI LEE ,  TAI-HAUR KUO

IPC: H03M1/12

CPC classification number: H03M1/0673 ,  H03M1/74 ,  H03M3/502

Abstract: A randomized thermometer-coding digital-to-analog converter (DAC) for the reduction of harmonic distortion due to non-ideal circuit mismatch is presented. The present invention introduces a new dynamic element matching technique that contains three properties of randomization, consecutive selection and less element switching activity to achieve good spurious-free dynamic range and small maximum output error. The topology uses a bank of 1-bit DAC elements, whose outputs are summed to produce a multi-level analog output. The binary digital input is encoded to be thermometer code. During a randomization period, the thermometer code is barrel-shifted to a specific starting position where the position is generated randomly. Thus, the DAC noise is randomized with less element switching activity and consecutive selection.

Abstract translation: 提出了一种用于减少由于非理想电路失配引起的谐波失真的随机温度计编码数模转换器（DAC）。 本发明引入了一种新的动态元素匹配技术，其包含随机化，连续选择和较少元件切换活动的三个特性，以实现良好的无杂散动态范围和小的最大输出误差。 该拓扑结构使用一组1位DAC元件，其输出相加以产生多电平模拟输出。 二进制数字输入被编码为温度计代码。 在随机化期间，温度计代码被桶形移位到随机生成位置的特定起始位置。 因此，DAC噪声随机化，具有更少的元件切换活动和连续选择。

公开(公告)号：US20070007912A1

公开(公告)日：2007-01-11

申请号：US11456093

申请日：2006-07-07

Applicant: Cheng-Chung Yang ,  Da-Huei Lee ,  Tai-Haur Kuo

Inventor： Cheng-Chung Yang ,  Da-Huei Lee ,  Tai-Haur Kuo

IPC: H05B41/36

CPC classification number: H02M1/32 ,  H03K17/0822 ,  H03K17/6872

Abstract: A power output device includes a bridged output stage, a reference voltage generator and a detecting unit to compare the output voltages from the aforementioned two units. The bridged output stage may be implemented by a full-bridge or a half-bridge configuration. The reference voltage generator is symmetric to the bridged output stage to generate a reference voltage, which is served as a reference voltage range for the voltage difference of the two terminals of the turned-on transistors in the bridged output stage during operation. When the detecting unit detects the voltages across the two terminals of the turned-on transistors in the bridged output stage exceed the reference voltage range, all the transistors are turned off and no power is outputted to the load. Therefore, the circuit is capable of preventing damages caused by a large current due to overload or short circuit.

Abstract translation: 功率输出装置包括桥接输出级，参考电压发生器和用于比较来自前述两个单元的输出电压的检测单元。 桥接输出级可以通过全桥或半桥配置来实现。 参考电压发生器对称于桥接输出级，以产生参考电压，其作为运行期间桥接输出级中的导通晶体管的两个端子的电压差的参考电压范围。 当检测单元检测到桥接输出级中的导通晶体管的两端的电压超过参考电压范围时，所有晶体管都截止，而不向负载输出功率。 因此，该电路能够防止由于过载或短路引起的大电流造成的损坏。

公开(公告)号：US07679539B2

公开(公告)日：2010-03-16

申请号：US12076876

申请日：2008-03-25

Applicant: Da-Huei Lee ,  Tai-Haur Kuo

Inventor： Da-Huei Lee ,  Tai-Haur Kuo

IPC: H03M1/66

CPC classification number: H03M1/0673 ,  H03M1/74 ,  H03M3/502

Abstract: A randomized thermometer-coding digital-to-analog converter (DAC) for the reduction of harmonic distortion due to non-ideal circuit mismatch is presented. The present invention introduces a new dynamic element matching technique that contains three properties of randomization, consecutive selection and less element switching activity to achieve good spurious-free dynamic range and small maximum output error. The topology uses a bank of 1-bit DAC elements, whose outputs are summed to produce a multi-level analog output. The binary digital input is encoded to be thermometer code. During a randomization period, the thermometer code is barrel-shifted to a specific starting position where the position is generated randomly. Thus, the DAC noise is randomized with less element switching activity and consecutive selection.

Abstract translation: 提出了一种用于减少由于非理想电路失配引起的谐波失真的随机温度计编码数模转换器（DAC）。 本发明引入了一种新的动态元素匹配技术，其包含随机化，连续选择和较少元件切换活动的三个特性，以实现良好的无杂散动态范围和小的最大输出误差。 该拓扑结构使用一组1位DAC元件，其输出相加以产生多电平模拟输出。 二进制数字输入被编码为温度计代码。 在随机化期间，温度计代码被桶形移位到随机生成位置的特定起始位置。 因此，DAC噪声随机化，具有更少的元件切换活动和连续选择。

公开(公告)号：US07576675B1

公开(公告)日：2009-08-18

申请号：US12076882

申请日：2008-03-25

Applicant: Da-Huei Lee ,  Tai-Haur Kuo

Inventor： Da-Huei Lee ,  Tai-Haur Kuo

IPC: H03M1/66

CPC classification number: H03M1/0818 ,  H03M1/742

Abstract: A return-to-zero current-steering DAC is presented. The presented return-to-zero technique can isolate the analog output nodes of the DAC from the coupling of the control signals of the DAC without sacrificing speed. The topology uses a bank of return-to-zero circuits, which employs return-to-zero and isolation transistors to implement the presented return-to-zero technique.

Abstract translation: 提出了一种归零电流导向DAC。 所提出的归零技术可以将DAC的模拟输出节点与DAC的控制信号的耦合隔离，而不会牺牲速度。 该拓扑结构使用一组归零电路，其采用归零和隔离晶体管来实现所提出的归零技术。

公开(公告)号：US07295414B2

公开(公告)日：2007-11-13

申请号：US11456093

申请日：2006-07-07

Applicant: Cheng-Chung Yang ,  Da-Huei Lee ,  Tai-Haur Kuo

Inventor： Cheng-Chung Yang ,  Da-Huei Lee ,  Tai-Haur Kuo

IPC: H02H9/08

CPC classification number: H02M1/32 ,  H03K17/0822 ,  H03K17/6872

Abstract: A power output device includes a bridged output stage, a reference voltage generator and a detecting unit to compare the output voltages from the aforementioned two units. The bridged output stage may be implemented by a full-bridge or a half-bridge configuration. The reference voltage generator is symmetric to the bridged output stage to generate a reference voltage, which is served as a reference voltage range for the voltage difference of the two terminals of the turned-on transistors in the bridged output stage during operation. When the detecting unit detects the voltages across the two terminals of the turned-on transistors in the bridged output stage exceed the reference voltage range, all the transistors are turned off and no power is outputted to the load. Therefore, the circuit is capable of preventing damages caused by a large current due to overload or short circuit.

Abstract translation: 功率输出装置包括桥接输出级，参考电压发生器和用于比较来自前述两个单元的输出电压的检测单元。 桥接输出级可以通过全桥或半桥配置来实现。 参考电压发生器对称于桥接输出级，以产生参考电压，其作为运行期间桥接输出级中的导通晶体管的两个端子的电压差的参考电压范围。 当检测单元检测到桥接输出级中的导通晶体管的两端的电压超过参考电压范围时，所有晶体管都截止，而不向负载输出功率。 因此，该电路能够防止由于过载或短路引起的大电流造成的损坏。