Tshebediso ya Differential Oscillator ho-Speed ​​FPGAs

Tshebediso ya Differential Oscillator ho-Speed ​​FPGAs

Li-oscillator tse fapaneng li na le ts'ebeliso ea bohlokoa haholo meahong e phahameng-ea FPGA ea lebelo, haholo lits'ebetsong tse nang le litlhoko tse phahameng tsa ho nepahala ha nako,-bokhoni ba ho thibela tšitiso, le mats'oao a nepahetseng, joalo ka:

Mahokelo a-a lebelo a phahameng (PCIe, SFP+/QSFP, 10G Ethernet, DDR4/DDR5)

Litsamaiso tse ngata- tsa ho fumana lintlha tsa kanane

Sistimi ea -ea khokahanyo e potlakileng (SerDes)

Sistimi ea khokahano e nepahetseng (ho beha nako, ho khanna ka ADC/DAC)

Differential Oscillator ke eng?

A Differential Oscillator ke oscillator e sebetsang ea kristale e hlahisang matšoao a fapaneng (joalo ka LVDS, LVPECL, HCSL), e hlahisang lipontšo tse peli tsa oache (CLK + le CLK-) tse fetisetsoang ho tse ling. E fapane le li-oscillator tsa setso- tse feliloeng (mohlala, CMOS-output Oscillators).

Melemo ea Lipontšo tse fapaneng:

Tshebediso ya Differential Oscillator ho-Speed ​​FPGAs

E sebetsa e le Sesupa-nako sa Litšupiso bakeng sa-Litšebelisano tsa Lebelo tse Phahameng

Likhokahano tse phahameng{{0}tse kang PCIe, 10G/25G Ethernet, le SATA li tlameha ho sebelisa lioache tsa litšupiso tse fapaneng;

Li-oscillator tse fapaneng tsa 100 MHz kapa 156.25 MHz (mohlala, tlhahiso ea HCSL/LVDS) li sebelisoa hangata;

Likarolo tse phahameng- tsa transceiver tsa lebelo (Transceivers) tse kang GTX/GTH/GTP ka hare ho FPGA li hloka lioache tsena tse fapaneng.

✅ Khokahano e Tloaelehileng:

Phapang ea Oscillator → FPGA GTREFCLK0/1 (-lithakhisa tsa litšupiso tsa litšupiso tsa transceiver tsa lebelo)

Mohloli oa Core Clock oa Sefate sa Clock

Ka litsamaiso tse ngata- tse phahameng-liteishene tsa lebelo, oscillator e fapaneng e tsamaisa chip ea ho tsamaisa oache (mohlala, SI5341/AD9528), e hlahisang lioache tse ngata tse hokahaneng;

E loketse tsamaiso ea oache ho likhokahano tse ngata-ADC, DAC, le FPGA.

✅ Setšoantšo sa Sebopeho:

Phapang ea Oscillator → Clock Management Chip (mohlala, PLL / Fanout Buffer)

↓

Lioache tse Kopantsoeng tse ngata → FPGA/ADC/DAC

Ho khanna FPGA Internal PLL/MMCM

Li-oscillator tse fapaneng li ka fana ka lioache tsa - tsa boleng bo holimo (mohlala, ho kena FPGA ka IBUFDS interface), 'me PLL/MMCM e ka hare e ntan'o hlahisa lioache bakeng sa module ka 'ngoe ea sistimi; sena se ntlafatsa boleng ba oache mme se fokotsa jitter ea oache ea sistimi ka kakaretso.

Mefuta e Tloaelehileng ea Phapano ea Phapano le Tšebelisano ea FPGA

✔ Ho khothaletsoa ho sebelisa mofuta o fapaneng oa phapano joalo ka ha o khothalelitsoe ke moetsi oa FPGA.

Litlhahiso bakeng sa Khetho ea Oscillator e fapaneng

Beha liprothokholo pele- maqhubu a khothaletsoang:

PCIe: 100 MHz;

SFP +/10G Ethernet: 156.25 MHz;

25G / 40G Ethernet: 312.5 MHz;

JESD204B/C: 250 MHz, 312.5 MHz, 625 MHz, joalo-joalo.

Sheba lethathamo la oache le khothaletsoang litokomaneng tsa semmuso tsa FPGA;

Low jitter ke ea bohlokoa:

RMS jitter < 0.5 ps (e hlokeha bakeng sa-mahokelo a lebelo a holimo);

E bohlokoa haholo bakeng sa PCIe, JESD204C, le 10G/25G Ethernet.

✅ Maqhubu a Tloaelehileng a Differential Oscillator ho-Speed ​​FPGAs

✔ Bakeng sa mefuta e ikhethileng, ho khothaletsoa ho ikopanya le barekisi ba Hangjing kapa lienjineri tsa tekheniki bakeng sa tlhahiso e tšoanang ea mefuta e fapaneng.

Kakaretso

Li-oscillator tse fapaneng e batla e le karolo e tloaelehileng tsamaisong ea sejoale-joale e phahameng-ea FPGA ea lebelo le holimo 'me ke lisebelisoa tsa bohlokoa tse netefatsang-likhokahano tse phahameng le ts'ebetso ea khokahanyo ea sistimi.

Haeba u na le mofuta o ikhethileng oa FPGA (joalo ka Xilinx Zynq Ultrascale+, Intel Stratix 10), mofuta o fapaneng oa oscillator, kapa tlhokahalo ea khokahano ea puisano (joalo ka PCIe Gen3/SFP+), Suzhou Hangjing e ka u thusa ho khothaletsa moralo o loketseng oa tlhophiso ea oache le moralo oa khokahano oa moralo.