Forum Post: functioning of LM 96570
I am working with LM96570 for portable ultra sound system design.By reading the data sheet i got the idea about how to program the delay values and dalay patterns.But I am unable get the what delay...
View ArticleForum Post: LM 96550 HV pulser
Sir,I am working with LM96550 for portable ultra sound system design. LM 96550 generating Vpp-.7,Vnn+0.7, 0 V what is the significance of these three voltage levels related to transducer.Thank you.
View ArticleForum Post: RE: LM 96550 HV pulser
Hi,As higher voltage you apply to the transducer, more acoustic energy is transmitted into the examined object. As a result you can achieve deeper penetration range. Regards
View ArticleForum Post: RE: functioning of LM 96570
Hi,The delays at T/R is used for steering and focusing the acoustic beam. This delays depend on mechanical dimensions of a single piezotransducer, number of transducers involved in acoustic wave...
View ArticleForum Post: RE: AFE5801 clocking
Hi John,Yes, you can create the clock using FPGA, however it is strongly recommended to distribute it to the multi-AFE system through the fan-out buffer.Read more about it...
View ArticleForum Post: RE: LM 96550 HV pulser
Applied voltage is NOT related with the acoustic beam steering!! Acoustic beam steering is done ONLY with a time delayed excitation of a piezo elements.Regards
View ArticleForum Post: RE: AFE5808
Hi Chandu,After the TX pulse you start the RX mode acquisition. At the begining of the acquisition you have a strong echoes from near located objects and in the time domain this echoes are weaker and...
View ArticleForum Post: RE: AFE5801 clocking
Hi Mariusz,Thank you for your suggestions! I really appreciate your help. It sounds like the second idea (from AFE5808 datasheet) might work the best for my case. I will give it a try!Thanks again!John
View ArticleForum Post: RE: functioning of LM 96570
Hi Chandu,I have sent the files to you. If any questions, ask here.Regards
View ArticleForum Post: Deserializing AFE5808 data on Spartan-6 FPGA
Hi Everybody,When clocking the AFE5808 40MSPS everything is fine. However, at 60MSPS the output from FPGA becomes a (unintended) perfect random number generator-:)Could anybody share the 12/14bit wide...
View ArticleForum Post: RE: AFE5808
Chandu,Mariusz's answer is correct. I wasn't sure how deep your question was. The function of the Attenuator is for Analog TGC to quickly and accurately vary the Gain with variable...
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Forum Post: RE: functioning of LM 96570
Hi Chandu,I've sent the software to you again. If you still have a problems with downloading the files, consult it with your internet provider.Below is a snap shot how it works.Regards,Mariusz
View ArticleForum Post: RE: how to use T/R switch (Tx810) in portable ultra sound system
Hi Chandu,Read again the TX810 documentation. On pages 9-11 you will find a step by step explanation.Regards, Mariusz
View ArticleForum Post: RE: Deserializing AFE5808 data on Spartan-6 FPGA
Hi Chuck,Ooopss, I've just clicked wrong button.. In fact, the problem is still 'alive'. I've made some tricks on timing costraint on FPGA. Works @65MSPS a little better, some bits are stable, some...
View ArticleForum Post: RE: AFE5801 clocking
Hi John,I'm glad that I've helped you somehow. Anyway, the first idea is also approved in practice. Whichever you choose, it should work fine.Best Regards,Mariusz
View ArticleForum Post: Migrating LM98714 to LM98725
HelloI am working on a prototype using the LM98725 where we previously used the LM98714. First of all I am looking for any documentation additional to the datasheets that might help me for the...
View ArticleForum Post: RE: differential amp driver for AFE5801
Chuck, I agree with you. External analog TGC circuitry is much more convenient and flexible. And it's cheap!! Schematic is very simple:[RAM(TGC curve)]=>DAC=>Integrating Amp.8-bit DAC is enough...
View ArticleForum Post: RE: differential amp driver for AFE5801
Dear Mariusz,Following your experience, AC coupling is better for AFE5801. Right?I want to use AFE5801 to build a 32-Channel daughter board for positron emission tomography (PET), eight daughter...
View ArticleForum Post: RE: AFE5808 + LMK03806
Hi Alan,Thanks for the response! It's just what I was looking for.Thanks,John
View ArticleForum Post: RE: functioning of LM 96570
Hi, Sir,I am using app which you suggested for delay calculations.Can you provide the documentation of that app ,which can give details about formulae used.And even i changed the direction the delay...
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