公开(公告)号：US20110043399A1

公开(公告)日：2011-02-24

申请号：US12647616

申请日：2009-12-28

申请人： Kwang-Hyun BAEK ,  Hong Chang YEOH ,  Jae-Hun JUNG ,  Yun-Hwan JUNG ,  Joon Hyun BAEK

发明人： Kwang-Hyun BAEK ,  Hong Chang YEOH ,  Jae-Hun JUNG ,  Yun-Hwan JUNG ,  Joon Hyun BAEK

IPC分类号： H03M1/66

CPC分类号： H03M1/687 ,  H03M1/745 ,  H03M1/747

摘要： The present invention relates to a digital to analog converter, to a return-to-zero digital to analog converter with improved wideband characteristics by enabling a return-to-zero output without separate clock and controller, and a converting method thereof. Since the return-to-zero digital to analog converter and the converting method thereof are capable of outputting an RZ output without directly providing a clock signal to an analog circuit by configuring a switch for generating a zero point signal and a differential pipeline for providing a differential signal to control the switch according to input digital data using a differential structure, the converter can provide wideband characteristics and high dynamic performance.

摘要翻译： 本发明涉及一种数模转换器，通过在没有单独的时钟和控制器的情况下实现归零输出，能够实现具有改进的宽带特性的归零数模转换器及其转换方法。 由于归零数模转换器及其转换方法能够通过配置用于产生零点信号的开关和差分管线来输出RZ输出而不向模拟电路提供时钟信号，以提供一个 差分信号根据输入数字数据使用差分结构控制开关，转换器可以提供宽带特性和高动态性能。

公开(公告)号：US20110043258A1

公开(公告)日：2011-02-24

申请号：US12626565

申请日：2009-11-25

申请人： Kwang-Hyun BAEK ,  Hong Chang YEOH ,  Jae-Hun JUNG ,  Yun-Hwan JUNG

发明人： Kwang-Hyun BAEK ,  Hong Chang YEOH ,  Jae-Hun JUNG ,  Yun-Hwan JUNG

IPC分类号： H03B21/00

CPC分类号： G06F1/022 ,  H03M1/664 ,  H03M1/687

摘要： The present invention relates to d a direct digital frequency synthesizer using a hybrid digital to analog converter, which is capable of synthesizing an analog signal with high quality without base decoding, thereby providing improved size and efficiency, and a synthesizing method thereof. The direct digital frequency synthesizer using a hybrid digital to analog converter, and a synthesizing method thereof are capable of simplifying a configuration of a PAM which matches output data of a phase accumulator to sine wave amplitude with an application of a hybrid DAC including a non-linear DAC and a linear DAC, without increase of complexity of a DAC, by causing the non-linear DAC to output a direct base point current using some bits of output data of a phase accumulator, causing the linear DAC to output a gradient current based on gradient information generated using other bits of the output data of the phase accumulator, and summing these currents for analog output. Accordingly, an effect of greatly reducing a size and power consumption can be achieved.

摘要翻译： 本发明涉及一种使用混合数模转换器的直接数字频率合成器，其能够在没有基本解码的情况下合成具有高质量的模拟信号，从而提供改进的尺寸和效率及其合成方法。 使用混合数模转换器的直接数字频率合成器及其合成方法能够简化将相位累加器的输出数据与正弦波振幅相匹配的PAM的结构， 线性DAC和线性DAC，而不增加DAC的复杂性，通过使非线性DAC使用相位累加器的输出数据的一些位输出直接基点电流，导致线性DAC输出基于梯度电流 在使用相位累加器的输出数据的其他位产生的梯度信息，并将这些电流相加以用于模拟输出。 因此，可以实现大幅度减小尺寸和功耗的效果。