Ama-Crystal Oscillator Ahlukile: Izicelo kanye Nobuchwepheshe Obubalulekile Kumamojula Okuxhumana Okubonayo

Njengoba ubuchwepheshe bokuxhumana obubonakalayo buthuthukela kuzivinini eziphezulu, ukuminyana okukhulu, kanye nokusetshenziswa kwamandla okuphansi, ukuzinza kanye{0}}nokusebenza okumelene nokuphazamiseka kwamasignali wewashi kube semqoka ekusebenzeni kohlelo lonke. Ama-oscillator e-crystal ahlukile, ngendlela yawo ehlukile yokudlulisa isignali, aya ngokuya evela njengemithombo yewashi ewumgogodla kumamojula optical afana nama-transceivers optical 400G/800G.

I. Izidingo Zewashi Nezinselele Kumamojula Okuxhumana Okubonakalayo

Ezinhlelweni zokuxhumana optical, amamojula optical anesibopho sokuguqula kahle amasignali kagesi abe amasignali optical. Izingxenye ezibalulekile ezifana namashayeli e-laser, ama-TIA, namasekhethi e-CDR abeka izidingo eziqinile kumasignali wewashi:

Umsindo wesigaba esiphansi kanye ne-jitter: -Ukudluliswa kwesignali yesivinini esiphezulu (isb, 56Gbps PAM4, 112Gbps NRZ) kudinga i-jitter ibe ngaphansi kuka-100 fs (ileveli ye-femtosecond) ukuze kuvinjelwe ukwanda kwezinga lephutha elincane (BER).

Ukumelana ne-EMI: Endaweni eyinkimbinkimbi kazibuthe kagesi-amamojula aminyana kakhulu, amawashi{1}}aphelile ajwayele ukungqubuzana.

Ukuzinza kwezinga lokushisa: Amamojula kufanele agcine ukuzinza kwemvamisa (±2.5 ppm noma okungcono) ebangeni lokushisa elibanzi (-40℃kuya ku-85 degree).

II. Izinzuzo Zezobuchwepheshe Ze-Differential Crystal Oscillators

Uma kuqhathaniswa nama-oscillator-aphelile angawodwa, ama-oscillator ekristalu ahlukanisiwe akhipha amasiginali{1}}okwehlukile ahlanekezelwe (isb, i-LVDS, i-LVPECL), okuthuthukisa kakhulu ukusebenza kwesistimu:

Ikhono Elithuthukisiwe Lokuvimbela Ukuphazamisa-

-Ukwenqatshwa kwemodi evamile: Abamukeli abahlukile basusa-umsindo wemodi ovamile (njengokushintshashintsha kwamandla kanye ne-EMI) ngokususa.

Eyehlisiwe imisebe ye-EMI: Izindlela zesiginali ezilinganayo zikhansela izinkundla zikagesi, zehlisa imisebe cishe ngama-20 dB.

Ubuqotho Besiginali obulungiselelwe

Izinga eliphezulu lokubulala: Izinguquko ezisheshayo zifinyeza izikhathi zokukhuphuka nokuwa, okubalulekile ku-56Gbps+ SerDes interface.

Ukumatanisa kokuphazamiseka: Ukulandela okuhlukile ngokwemvelo kufanelana ne-100Ω impedance, idizayini ye-PCB yenza lula.

Ukusetshenziswa Kwemandla Okuphansi
Ama-oscillator asuselwa ku-LVDS{{0}asekelwe kokuhluka asebenzisa amandla angaphansi kuka-60–70% kunalawo-aphelile, ahlangabezana namazinga aphansi-amandla afana ne-QSFP-DD.

III. Izicelo Ezijwayelekile Kumamojula Okubona

-Umthombo wewashi le-Speed ​​SerDes Eliphezulu
Isicelo: Ihlinzeka ngamawashi ayireferensi ama-modulators e-PAM4 namasekhethi e-CDR.
Isibonelo: Amamojula angu-100G/400G asebenzisa u-156.25 MHz noma 312.500 MHz ama-oscillator ahlukile ane<50 fs RMS jitter (integrated over 12 kHz–20 MHz).

Ukuvumelanisa{{0}Iziteshi Eziningi
Uhlelo lokusebenza: Ukuvumelanisa kwesigaba kumamojula-eziteshi eziningi (isb, i-CFP2/QSFP-DD).
Ubuchwepheshe obuyinhloko: Ama-oscillator-okukhiphayo amaningi (isb, 4-channel LVDS) anciphisa i-skew ukuya ku-±50 ps.

Isinxephezelo Sezinga Lokushisa
I-TCXO Ehlukile: Ihlanganisa izinzwa zokushisa nama-algorithms esinxephezelo ukuze kuzuzwe ukuzinza kwefrikhwensi engu-±2.5 ppm ngaphezu kwe-degree -40 kuya ku-85 degree.

IV. Amathrendi embonini nemihlahlandlela yokukhetha

Amathrendi wezobuchwepheshe

Amafrikhwensi aphezulu: Ama-oscillator angu-224 GHz manje asekela amamojula abonakalayo angu-1.6T.

I-Miniaturization: Amaphakheji angu-2520 (2.5×2.5 mm) athatha indawo yamaphakheji angu-5032/7050 e-CPO (Co-I-Packaged Optics).

Ukuhlanganiswa: Ama-oscillator anezihlungi zamandla-zakhelwe ngaphakathi kanye ne-spectrum yokusabalalisa anciphisa ubunkimbinkimbi besekethe.

Imibandela Yokukhetha Ebalulekile (Ibanga Lemboni)

Amamodeli we-Hangjing: 1532C6-156.250K18DTSTL, 1553D-156.250K33DTSTL, 1575C-156.250K33DTSTL, 1532D-312.500J33DTL, 13K33D0D0D0.

Okuphezulu{{0}Ukuzinza/Okuphezulu{1}Izimfuneko Zokunemba
I-TCXO (LVDS/LVPECL): Uchungechunge lwe-Hangjing lwe-TC32D6/TC32P6/TC53H8 luhlangabezana nokucaciswa okuqinile:

Ukuze uthole-ama-oscillator asebenzayo aphezulu, sicela uxhumane nonjiniyela bohlelo be-Hangjing ukuze uthole izixazululo ezenziwe ngokwezifiso.

Isiphetho

Ama-crystal oscillator ahlukile, anokumelana kwawo ne-EMI, i-jitter ephansi, kanye nezinzuzo zokuhlanganisa, abalulekile-kumamojula abonakalayo asheshayo. Njengoba ukuxhumana okubonakalayo kuthuthukela enkathini ye-800G/1.6T, ubuchwepheshe bewashi obuhlukile buzoqhubeka nokuphusha imingcele yokusebenza kwemboni.