公开(公告)号：US06591230B1

公开(公告)日：2003-07-08

申请号：US09687546

申请日：2000-10-13

Applicant: Yinong Ding ,  Ching-yu Hung

Inventor： Yinong Ding ,  Ching-yu Hung

IPC: G06F300

CPC classification number: G06F1/0328

Abstract: A coprocessor (15) for synthesizing a signal from the sum of sinusoids preferably includes an electronic system (20) having a host processor (12) that forwards frame boundary parameters to the coprocessor (15). Parameter registers (26) in coprocessor (15) store synthesis parameters for iteratively deriving amplitude and phase values for each sample point within a data frame. Adders (28, 30, 32) generate current amplitude from one addition, and current phase value from two additions, with the results stored back into parameter registers (26). A sine function calculator circuit (34), which may use a CORDIC technique, receives the current amplitude and phase values, and generates a digital component signal for the current sample point for one of the sinusoids. Digital component signals are accumulated at the sample point in a data sample buffer (40) and output at an output (44).

Abstract translation: 用于从正弦曲线的和合成信号的协处理器（15）优选地包括具有将帧边界参数转发到协处理器（15）的主处理器（12）的电子系统（20）。 协处理器（15）中的参数寄存器（26）存储用于迭代地导出数据帧内每个采样点的幅度和相位值的合成参数。 加法器（28,30,32）从一次加法产生电流幅度，并从两次加法产生电流相位值，结果存储回参数寄存器（26）。 可以使用CORDIC技术的正弦函数计算器电路（34）接收当前的幅度和相位值，并且为一个正弦波产生用于当前采样点的数字分量信号。 数字分量信号在数据采样缓冲器（40）中的采样点累积，并在输出（44）处输出。