本文介绍了基于可控电流源的高精度高细分数步进电机细分驱动方法，采用
PwM(脉冲宽度调制)和5阶巴特沃斯低通滤波器实现了双14位精度较高的DAc，用
于控制精密可控电流源的电流输出，使得励磁线圈中流经的电流为稳定的直流，实现
了步进电机低噪声，高稳定度的细分驱动运行。
This article describes the controlled current source based on the subdivision number of high precision stepping motor driving method, using PwM (pulse width modulation) and 5-order Butterworth low-pass filter to achieve a double-precision 14-bit high DAc, precision controlled current source for controlling the current output, making the current flowing through the coil excitation for the stability of the DC, stepper motor to achieve a low noise, high stability of the sub-drive operation. (2010-04-16, VHDL, 2892KB, 下载74次)
设计了一个双精度浮点乘法器。该器件采用改进的BOO TH 算法产生部分积, 用阵列和
树的混合结构实现对部分积的相加, 同时, 还采用了快速的四舍五入算法, 以提高乘法器的性能。把
设计的乘法器分为4 级流水线, 用FPGA 进行了仿真验证, 结果正确 并对FPGA 实现的时序结果
进行了分析。
Designed a double-precision floating-point multiplier. The device uses an improved algorithm for BOO TH generate part of the plot, with a mixed array and a tree structure to achieve the sum of the partial product, while also using a fast rounding algorithm to improve the performance of multipliers. The design of the multiplier is divided into four lines, carried out a simulation using FPGA verification result is correct and FPGA timing to achieve the results analyzed. (2010-02-22, VHDL, 205KB, 下载41次)