M'makadi apamwamba-opeza data mwachangu (DAQ), kukhazikika ndi kulondola kwa siginecha ya wotchi ndizofunikira kwambiri pakuyesa ndi kutumiza deta. Ma crystal oscillator osiyanasiyana, omwe amadziwika chifukwa cha phokoso lochepa, sangasokonezedwe, komanso osasunthika, amagwiritsidwa ntchito kwambiri{2}}pamakina opeza data mwachangu. Amapereka chithandizo chodalirika cha wotchi makamaka pamapulogalamu omwe amafunikira ma sampuli apamwamba komanso ma bandwidth apamwamba.
1. Ubwino wa Oscillator Osiyanasiyana
>> Phokoso Lapansi:Amachepetsa jitter ya wotchi, kuwonetsetsa kuti{0}}sampler azichitika molondola.
>> Mphamvu Zotsutsa{0}}Zosokoneza:Imasunga kukhulupirika kwa ma siginecha pakadutsa-paulendo wautali komanso m'malo aphokoso.
>> Ubwino Wazikwangwani:Ndiwoyenera kutumiza{0}liwiro la data komanso kuchuluka-zofuna za bandiwifi, makamaka zoyenerera-zosanja zamakina ambiri.
2. Zochitika za Ntchito
Kutengera zofunikira zamamodule osiyanasiyana amkati mkati mwa-khadi yothamanga kwambiri ya DAQ, ma oscillator osiyanitsa amakhala ndi gawo lalikulu pazochitika zitatu zomwe zafotokozedwa pansipa. Mafupipafupi amaperekedwanso:
|
Ntchito Scenario |
Ntchito Yoyambira |
Common Frequency |
Mfundo Zaukadaulo |
|
FPGA High{0}}Speed Transceiver Reference Clock |
Imakhala ndi wotchi yolozera ma transceivers a GTH/GTX mkati mwa FPGA, yomwe imagwiritsidwa ntchito potumiza-liwiro lokweza data ngati PCIe ndi 10 Gigabit Ethernet. |
100MHz |
• 100MHz:Mafupipafupi owerengera mabasi apakompyuta ngati PCIe ndi SATA. |
|
High-Speed ADC/DAC Sampling Clock |
Mwachindunji zimatsimikizira kuchuluka kwa zitsanzo. Amapereka mawotchi olondola, otsika-otsika kwambiri, kuonetsetsa kuti{2}}atembenuka mokhulupirika kuchokera ku ma siginali aanalogi kupita ku digito. |
250MHz |
• 250MHz:Nthawi zambiri amagwiritsidwa ntchito pa JESD204B/C high-malo osinthira data mwachangu. |
|
Multi{{0}Channel Synchronous Clock Tree |
Imagwiritsidwa ntchito ngati gwero lalikulu la chip buffer/distributor chip m'makadi-opeza matchanelo ambiri. Pambuyo pogawa, imayendetsa ma ADC onse kuti azigwira ntchito mogwirizana, kuwonetsetsa kusasinthika pamakanema. |
100MHz |
• 100MHz:Zambiri-zofuna zapamwamba{1}}zolondola za PLL. |
3. Oscillators Osiyana kuchokera ku Hangjing
HCI differential oscillators amatengedwa kwambiri mu machitidwe kupeza deta. Timapereka ma oscillator awa m'maphukusi anayi - 7050, 5032, 3225, ndi 2520 - komanso okhala ndi mitundu itatu yotulutsa - LVDS, LVPECL, ndi HCSL - opereka zosankha zosinthika kuti zigwirizane ndi zosowa zosiyanasiyana zamakasitomala.
HCI ikhoza kupereka mayankho ofananira ndi zitsanzo zaulere. Ngati kuli kofunikira, lemberani malonda anu odzipereka kapena woimira luso.