square waveform meaning in Chinese
方波形
矩形波形
Examples
- Sine , triangle , ramp and square waveforms
输出波形：正弦波,三角波, ramp与方波 - 20 mhz sine and square waveforms
20 mhz正弦波和方波 - 3 sine and square waveforms above 25 mhz only with infinite burst count
3 25mhz以上的正弦波和方波只能有无限的脉冲列计数 - 7 sine and square waveforms above 6 mhz are allowed only with an infinite burst count
7仅允许6mhz以上的正弦波和方波有"无限"脉冲串计数 - Advanced fpga technology is introduced to improve the integration of digital circuits , and all digital circuits in the original module are integrated in the fpga chips , which could not only reduce the cost , but also improve the reliability and measurement precision of the circuits . high speed digital signal processor ( dsp ) is selected as the coprocessor instead of scm ; it can receive all kinds of commands sent from vxi , analyze and execute the commands , harmonize each section of the module and process the data . higher - conversion - speed comparator chip is adopted to convert the input signals being measured into square waveform signals which could be identified by fpga chip ; it can expand the measurement range of frequency dramatically
本文在原有vxi总线四通道计数器模块的设计基础上,通过对原模块缺陷的分析,采用一些新的技术和新的电子器件来重新设计该计数器模块:采用最新的fpga技术来提高数字电路的集成度,将原模块中的所有数字电路全部集成在fpga芯片中,这样不仅能节约成本,还能提高电路的可靠性和测量精度;采用高速的数字信号处理器( dsp )取代原有的单片机作为协处理器,来接收vxi发来的各种命令,分析命令、执行命令、协调模块各部分的工作以及对数据的处理;采用转换速率更高的比较器芯片将输入的被测信号转换为fpga芯片能够识别的方波信号,能极大提高测量频率的范围;采用d / a转换芯片和隔离运算放大器得到隔离通道所需的比较电平,该比较电平值能够根据实际需求进行设置,能增强模块的使用灵活性。