Ukusetshenziswa kwama-Differential Oscillator kuma-FPGA-esivinini esikhulu

Ukusetshenziswa kwama-Differential Oscillator kuma-FPGA-esivinini esikhulu

Ama-oscillator ahlukile anezinhlelo zokusebenza ezibaluleke kakhulu-eziklanyweni ze-FPGA ezinesivinini esikhulu, ikakhulukazi kumasistimu anezidingo eziphezulu zokunemba kwewashi,-amandla okuphazamisa, nobuqotho besignali, njengale:

Izixhumi ezibonakalayo ze-serial-ezinesivinini esiphezulu (PCIe, SFP+/QSFP, 10G Ethernet, DDR4/DDR5)

Amasistimu{0}}okuthola idatha yeziteshi eziningi

Amasistimu-okuxhumana anesivinini esiphezulu (SerDes)

Amasistimu okuvumelanisa anembile (isitembu sesikhathi, ukushayela kwe-ADC/DAC)

Iyini i-Differential Oscillator?

I-Differential Oscillator iyi-crystal oscillator esebenzayo ekhipha amasiginali ahlukene (njenge-LVDS, LVPECL, HCSL), ekhiqiza amasiginali wewashi amabili (CLK+ ne-CLK−) aphendukezelwe omunye komunye. Ihlukile kuma-oscillator avamile-aphelile (isb, i-CMOS-Ama-Oscillator okukhiphayo).

Izinzuzo Zezimpawu Ezihlukile:

Ukusetshenziswa kwama-Differential Oscillator kuma-FPGA-esivinini esikhulu

Isebenza Njengewashi Lereferensi-le-Speed ​​Interfaces

Izixhumanisi-ezinesivinini esiphezulu ezifana ne-PCIe, 10G/25G Ethernet, ne-SATA kufanele zisebenzise amawashi ayisithenjwa;

100 MHz noma 156.25 MHz umehluko oscillator (isb, HCSL/LVDS okukhiphayo) avame ukusetshenziswa;

-Amamojula we-transceiver esivinini esikhulu (Ama-Transceivers) afana ne-GTX/GTH/GTP ngaphakathi kwe-FPGA adinga lawawashi ayizethenjwa.

✅ Ukuxhumana Okujwayelekile:

I-Differential Oscillator → FPGA GTREFCLK0/1 ({2}}izikhonkwane zewashi lereferensi yesivinini esiphezulu)

Umthombo wewashi le-Clock Tree

Kumasistimu-aphakeme{1}}eziteshi eziningi, i-oscillator ehlukile ishayela i-chip yokusabalalisa iwashi (isb., SI5341/AD9528), ebese ikhipha amawashi avumelanisiwe amaningi;

Ifanele ukuqondisa kwewashi ekuxhumaneni okuningi-kwe-ADC, i-DAC, ne-FPGA.

✅ Umdwebo Wesakhiwo:

I-Oscillator Ehlukile → I-Chip Yokulawula Iwashi (isb, i-PLL / Ibhafa yeFanout)

↓

Amawashi Avumelanisiwe Amaningi → FPGA/ADC/DAC

Ukushayela i-FPGA Yangaphakathi PLL/MMCM

Ama-oscillator ahlukile anganikeza- okokufaka kwewashi kwekhwalithi ephezulu (isb, ukungena ku-FPGA ngokusebenzisa isixhumi esibonakalayo se-IBUFDS), kanye ne-PLL/MMCM yangaphakathi bese ikhipha amawashi emojuli yesistimu ngayinye; lokhu kuthuthukisa ikhwalithi yewashi futhi kunciphisa i-jitter yewashi lesistimu iyonke.

Izinhlobo Zokukhipha Ezijwayelekile Ezihlukile kanye Nokuhambisana Kwe-FPGA

✔ Kunconywa ukusebenzisa uhlobo lokuphumayo olufanisiwe njengoba kunconywe umkhiqizi we-FPGA.

Izincomo Zokukhetha Okuhlukile Kwe-oscillator

Beka kuqala iphrothokholi{0}}amaza anconyiwe:

I-PCIe: 100 MHz;

I-SFP +/10G Ethernet: 156.25 MHz;

I-25G/40G Ethernet: 312.5 MHz;

I-JESD204B/C: 250 MHz, 312.5 MHz, 625 MHz, njll.

Bheka ibanga lewashi elinconyiwe emibhalweni esemthethweni ye-FPGA;

I-jitter ephansi ibalulekile:

I-RMS jitter < 0.5 ps (iyadingeka-ezixhumi ezibonakalayo ezinesivinini esiphezulu);

Ibaluleke kakhulu i-PCIe, i-JESD204C, ne-10G/25G Ethernet.

✅ Ama-Frequency Ajwayelekile E-Differential Oscillator ku-High-Speed ​​FPGAs

✔ Ngamamodeli athile, kuyanconywa ukuthi uxhumane nabadayisi be-Hangjing noma onjiniyela bezobuchwepheshe ukuze uthole isincomo sohlobo lokukhiphayo olufanisiwe.

Isifinyezo

Ama-oscillator ahlukile acishe abe yingxenye evamile kumasistimu esimanje aphezulu-e-FPGA futhi angamadivayisi abalulekile aqinisekisa{1}}ukuxhumana okuphezulu nokusebenza kokuvumelanisa kohlelo.

Uma unemodeli ethile ye-FPGA (efana ne-Xilinx Zynq Ultrascale+, Intel Stratix 10), imodeli ye-oscillator ehlukile, noma imfuneko yesixhumi esibonakalayo sokuxhumana (njenge-PCIe Gen3/SFP+), i-Suzhou Hangjing ingakusiza ukuncoma uhlelo olufaneleka kakhulu lokumisa iwashi kanye nomklamo wohlelo lokuxhuma.