• What is Mcounter in HMC769?

    What is Mcounter in HMC769? This block don`t shown in the HMC769 structure.

  • RE: 关于hittite的PLL芯片时序问题

    1. HMC769没有寄存器顺序要求;

    2. SPI控制, 如果需要控制3片HMC769, 每个HMC769需单独的CEN/SEN

  • RE: Jitter data of HMC769LP6CE & HMC702LP6CE+HMC511LP5E(@9.4GHz)

    The Hitt-PLL tool can simulate phase noise at 9.1G and calculate jitter for the 10 KHz to 40 MHz integration limits.  The HMC769 model files are included as part of the tool installation package.  Set the output to 9.1G and change the Noise Integration…

  • frequency sweep problem of HMC769

    Hi, all


    I'm trying to use HMC769 as a FMCW signal generator. After 2 days' groping for the SPI interface, I have finally made HMC769 output fixed frequency in integer or fractional modes.


    I followed the "PLLs WITH INTEGRATED VCO - MICROWAVE…

  • RE: PLL board layouts

    hmc764

    hmc765

    hmc783

    HMC807

    hmc767

    hmc769

    hmc778

    The HMC767, HMC769 and HMC778 share the same evaluation board. These can be found on the 'Discussion' section on the Full Product page for the HMC778 on the website (links back to EZ). I've attached…

  • hmc769锁定问题

    1、hmc769锁9.75GHz的频率时候,RFout是否一定要除2进入n-counter还是可以直通进入n-counter?

    2、如果仿真hmc769锁9.75GHz的环路,应该使用什么软件?谢谢

  • RE: FRACTIONAL-N PLL WITH INTEGRATED VCO (HMC835LP6GE), SPI read back gives REG 0 value (C7701A h) if read from any register.

    The second capture better matches Figure 18 in the HMC769 Operating Guide but both should work.

    Writing 0x09, 0x73, 0x70, 0x00 causes the device read register 0x10.  Figure 18 in the  HMC769 Operating Guide shows what to expect on LD/SDO with every subsequent…

  • RE: HMC767 unstable, loop filter design?

    Hello,

    I have a similar problem with HMC769. I'm using the original Hittite hmc769 evaluation board. I'm using external 20MHz xtal reference, and I'm sending registrers, using evaluation software (see attached registers file). I'm able to generate and…

  • 关于HMC769的寄存器配置问题

    您好,我在使用HMC769 芯片产生一个8.8GHz单频点信号时,

    1)参考源为100MHz晶振,Hcmos输出波形。

    2)环路滤波器是无源结构(采用ADF4351的滤波器结构),带宽50kHz。

    3)CEN端口使用一个100k的上拉电阻与3.3V电源相连接,SEN采用了一个100k的下拉电阻

            通过3.3V单片机将下列寄存器配置参数输入HMC769中,但是HMC769无任何反应,频谱中一直是一个8.01GHz的没有锁定信号,所以,请教一下:(1)我的寄存器配置是否有问题?(由于寄存器中有很多参数不是太明白有何作用…

  • HMC769LP6CE

    We are new with HMC769LP6CE Fractional-N PLL with Integrated VCO SMT, 9.05 - 10.15 GHz and we are need to use this device for a single frequency 9GHz phase locked.  As we are a microwave company we are bit thin on the knowledge of digital domain.  We have…