时钟和DDS

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by Lxx123
时钟和DDS

Latest 1 month ago by Echen5
137 1 1
Suggested Answer
AD9910 配置为零交越RAM模式的步骤？ 0
Suggested Answer

AD9910配置为零交越RAM模式？在直接转换模式下只需要一个控制字，零交越需要在指定为相位控制，相位怎么给？只给一个初相位吗？

clock and timing Direct Digital Synthesis (DDS)

137 1 1
by test14
时钟和DDS

Latest 1 month ago by Echen5
79 1 0
Answered
求助 0
Answered

有哪位大佬可以提供一份AD9837的驱动代码

79 1 0
by 111111
时钟和DDS

Latest 3 months ago by beiszj
2535 12 1
Answered
AD9910出现二次谐波原因？ 0
Answered

输出10MHZ，有20MHZ谐波输出，依次类推，输出11MHZ，有22MHZ。请帮助解答。

clock and timing Direct Digital Synthesis (DDS) ad9910

2535 12 1
by lingyin
时钟和DDS

Latest 5 months ago by Echen5
425 1 0
Not Answered
AD9516 spi数据写不进或读不出来 0
Not Answered

最近在用AD9516芯片，照着芯片手册的时序写了一份spi代码，寄存器配置采用评估板生成的，现在主要有两个问题：1.spi时序，数据都没问题，也在最后面加入了0x023201更新寄存器，就是出不来波形，ld也为低，怀疑spi根本没写进去，但我spi时序和数据检查了都没问题 2.spi读芯片内部的寄存器配置，发现sdo信号一直拉高，我已经事先写入0x000099以激活sdo，但仍没有反应。现在怀疑spi根本没写进芯片，但我不知道如何解决，希望您能提出点建议，谢谢

425 1 0
by Jack1234
时钟和DDS

Latest 6 months ago by Jack1234
140 1 1
Not Answered
AD9520-4 cannot load register values from EEPROM after reset 0
Not Answered

Hi Experts, I'm using AD9520-4 in my circuit. I setup and write all registers into this chip by I2C bus. And I follow "Writing to the EEPROM" instructions to program EEPROM and no error shown at Register 0xB01[0] or Register 0xB00[0]. However...

Clock Generation Devices Clock Generation and Distribution ad9520

140 1 1
by qingniao
时钟和DDS

Latest 9 months ago by WKLXC
3989 8 1
Answered
AD9914的同步 0
Answered

我现在使用 CPLD 配置贵公司的两片 ad9914 芯片实现输出 300 多兆的正弦连续波，现在基本波形已经输出，两片的配置完全一样，但是每次上电或者复位之后，两片的相位差均不一样。具体情况为：两片 AD9914 采样 3.2G 的直接时钟，不用内部的锁相环，两片时钟输入完全一样。采用并口配置， profile 模式，相位偏移两片都设置为 0 。我按照 ADI 网站上的应用笔记《 AN-1254 ：同步多个基于 DDS 的频率合成器 AD9915 》参见上图中的步骤进行的同步配置...

clock and timing Direct Digital Synthesis (DDS) ad9914

3989 8 1
by zhx1314
时钟和DDS

Latest 11 months ago by Echen5
530 3 0
Not Answered
FPGA控制AD9910无输出 0
Not Answered

我想用FPGA控制AD9910,spi串口通信模式，首先mast_rest拉高，等待5ms后，CS拉低发送cfr1 = 32'h00000002；cfr2 = 32'h01000000;cfr3 = 32'h050F4132;profil0= 64'h3000000025097b42;波形杂乱，不是预期的正弦波形，读取寄存器sdo也是一直拉高，怀疑是SPI没用将配置写进去，不知道是哪里出现了问题，求助，外部时钟40M

530 3 0
by zhaofeng201@163.com
时钟和DDS

Latest over 1 year ago by IAMNOTIAM
3912 3 0
Answered
锁相环锁定之后输出频率与参考频率相位问题 0
Answered

一直觉得锁相环出来的时钟（整数倍参考时钟频率）应该和参考时钟边沿对齐。对看了锁相环的一些推到公式后，发现锁相环锁定后只要相位恒定，也认为是锁定，这就造成了边沿不对齐的情况。后来查看了ADI官方的文档《 Phase Locked Loops for High-Frequency Receivers and Transmitters–Part 3》以及几篇帖子《 [博客大赛]锁相环锁定后的相位问题（二） - zhaopingtao的博客 - EDN China博客》，发现ADI使用的PFD可以做到频率和相位的对其...

3912 3 0
by LZY1007
时钟和DDS

Latest over 1 year ago by Echen5
667 1 0
Answered
AD9914线性扫频，时域波形幅值在前0~140ns幅度偏小，出现突变 0
Answered

AD9914线性扫频，时域波形幅值在前0~140ns幅度偏小出现突变，线性扫频的起始频率微1750M，到1800M结束。（任意起始频点现象一致）

hardware

667 1 0
by lb78
时钟和DDS

Latest over 1 year ago by lb78
769 4 1
Not Answered
AD9850输出频率不稳定 0
Not Answered

我新焊接的5块脉冲频率输出板是用AVRl62单片控制AD9850来产生某个指定频率的脉冲的，同批次焊接的5块板子，只有一块能稳定输出指定频率，其余4块板子，均出现输出频率和设定频率差异较大的现象，偶然发现在带着单片机下载电缆的情况下（即仿真运行时），不能稳定输出的板子中有1-2块能正常输出频率，怀疑是供电不足，但移除下载电缆后，在下载电缆入口补接一组电源进来后，发现这根补接的电源线长度不一样，也会出现不能稳定输出的情况，4块板子有两块采用了10cm的电源和地可以正常输出频率，但如果换50cm的线则不行...

hardware

769 4 1

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时钟和DDS

Suggested Answer
AD9910 配置为零交越RAM模式的步骤？ 0
Suggested Answer

Answered
求助 0
Answered

Answered
AD9910出现二次谐波原因？ 0
Answered

Not Answered
AD9516 spi数据写不进或读不出来 0
Not Answered

Not Answered
AD9520-4 cannot load register values from EEPROM after reset 0
Not Answered

Answered
AD9914的同步 0
Answered

Not Answered
FPGA控制AD9910无输出 0
Not Answered

Answered
锁相环锁定之后输出频率与参考频率相位问题 0
Answered

Answered
AD9914线性扫频，时域波形幅值在前0~140ns幅度偏小，出现突变 0
Answered

Not Answered
AD9850输出频率不稳定 0
Not Answered

Answered
求助 0
Answered

Answered
AD9914线性扫频，时域波形幅值在前0~140ns幅度偏小，出现突变 0
Answered

Answered
AD9913的使用问题 0
Answered

Answered
AD9544工作状态都正常，没有输出，怎么回事？ 0
Answered

Answered
ADC时钟 0
Answered

Answered
AD620差分放大问题 0
Answered

Answered
AD9910 DRG模式调试 0
Answered

Answered
DDS AD9834相关问题 0
Answered

Answered
AD9956时钟选择 0
Answered

Answered
adf4002最小鉴相频率是多少？ 0
Answered

时钟和DDS

Suggested Answer AD9910 配置为零交越RAM模式的步骤？ 0 Suggested Answer

Answered 求助 0 Answered

Answered AD9910出现二次谐波原因？ 0 Answered

Not Answered AD9516 spi数据写不进或读不出来 0 Not Answered

Not Answered AD9520-4 cannot load register values from EEPROM after reset 0 Not Answered

Answered AD9914的同步 0 Answered

Not Answered FPGA控制AD9910无输出 0 Not Answered

Answered 锁相环锁定之后输出频率与参考频率相位问题 0 Answered

Answered AD9914线性扫频，时域波形幅值在前0~140ns幅度偏小，出现突变 0 Answered

Not Answered AD9850输出频率不稳定 0 Not Answered

Answered 求助 0 Answered

Answered AD9914线性扫频，时域波形幅值在前0~140ns幅度偏小，出现突变 0 Answered

Answered AD9913的使用问题 0 Answered

Answered AD9544工作状态都正常，没有输出，怎么回事？ 0 Answered

Answered ADC时钟 0 Answered

Answered AD620差分放大问题 0 Answered

Answered AD9910 DRG模式调试 0 Answered

Answered DDS AD9834相关问题 0 Answered

Answered AD9956时钟选择 0 Answered

Answered adf4002最小鉴相频率是多少？ 0 Answered

Suggested Answer
AD9910 配置为零交越RAM模式的步骤？ 0
Suggested Answer

Answered
求助 0
Answered

Answered
AD9910出现二次谐波原因？ 0
Answered

Not Answered
AD9516 spi数据写不进或读不出来 0
Not Answered

Not Answered
AD9520-4 cannot load register values from EEPROM after reset 0
Not Answered

Answered
AD9914的同步 0
Answered

Not Answered
FPGA控制AD9910无输出 0
Not Answered

Answered
锁相环锁定之后输出频率与参考频率相位问题 0
Answered

Answered
AD9914线性扫频，时域波形幅值在前0~140ns幅度偏小，出现突变 0
Answered

Not Answered
AD9850输出频率不稳定 0
Not Answered

Answered
求助 0
Answered

Answered
AD9914线性扫频，时域波形幅值在前0~140ns幅度偏小，出现突变 0
Answered

Answered
AD9913的使用问题 0
Answered

Answered
AD9544工作状态都正常，没有输出，怎么回事？ 0
Answered

Answered
ADC时钟 0
Answered

Answered
AD620差分放大问题 0
Answered

Answered
AD9910 DRG模式调试 0
Answered

Answered
DDS AD9834相关问题 0
Answered

Answered
AD9956时钟选择 0
Answered

Answered
adf4002最小鉴相频率是多少？ 0
Answered