PLL NOT WORKING IN TEMPERATURE

Jayaprakash on Oct 11, 2014

Sir,

Pls help to find an unlocking issue in PLL ckt using AD4156 and HMC587 VCO.It became unlock b/w the temperature range of +17 to +20 C.Freq is 5.5GHZ.It is working fine above and below this range.

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Jayaprakash Oct 31, 2014 +1

Sir,

Finally I could find out the problem.The pad of LNA detached (very very small portion) from the body.The image attached is taken using a magnifier having 110 zoom.HMC 587 output is divided using…

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0 lallison

on Oct 13, 2014 5:05 PM
Hi Jayaprakash,

Thank you for your inquiry. You have asked your question in the Help space for learning how to use EngineerZone. I am moving your question to the RF and Microwave area for assistance.

Thank you,

Lisa
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0 lallison

on Oct 13, 2014 5:05 PM
Hi Jayaprakash,

Thank you for your inquiry. You have asked your question in the Help space for learning how to use EngineerZone. I am moving your question to the RF and Microwave area for assistance.

Thank you,

Lisa
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