Insobanuro ido n'ido y'Ikinyabuzima c'Ikibiriti, Igitera c'Ikinyabuzima, n'Urusaku rw'Igice

Insobanuro ido n'ido y'Ikinyabuzima c'Ikibiriti, Igitera c'Ikinyabuzima, n'Urusaku rw'Igice

Igikoresho co guhindura amabuye (XO/TCXO/OCXO) ni co mutima w'isaha w'ibikoresho vy'ubuhinga bwa none, kigatanga igihe co gukoresha ku bikoresho vy'ubuhinga bwa none, FPGA, n'ibikoresho vy'umuvuduko munini-. Jitter ni igipimo nyamukuru co gusuzuma ukuri kw'isaha - yerekeza ku gukevya kw'igihe hagati y'urubibi nyarwo rw'ikimenyetso c'isaha n'urubibi rwiza, rusanzwe rutahurwa nk'"ikosa ry'igihe" ry'isaha.

Ivyiyumviro vy’uguhungabana kw’ikinyabuzima c’ikibiriti ntibiva ku kintu kimwe; rishobora guca mu mice ibiri ikomeye: Ivyiyumviro vy’Ivyiyumviro (DJ) n’Ivyiyumviro vy’Ivyiyumviro (RJ). Mu buhinga, uguhungabana gupimwa n’ibipimo nk’Uguhungabana kw’Igice ca RMS, Uguhungabana kw’Igihe ca RMS, n’Uguhungabana kw’Igihe-kugeza kuri-Igihugu (CC). Ivyo bipimo birafitaniye isano ariko bidondora ingero zitandukanye z’uguhungabana.

1. Ubwoko bubiri bw’ishimikiro bw’uguhungabana: Guhungabana kw’ibintu (DJ) n’uguhungabana kw’ibintu (RJ)

Ivyo ni vyo bihambaye cane mu gushikiriza ivy’uguhungabana kw’ivyuma vy’amabuye y’agaciro. Ivyo bibiri biratandukanye cane n’inkomoko, ibiranga be n’uko bishobora gukoreshwa neza.

1.1 Guhagarika umutima (DJ)

Jitter idasanzwe, ishobora gukurikirana, kandi ifise aho igarukira, ifatwa nk'"ikosa rishobora gusanurwa riterwa n'ibintu vyo hanze."

Inkomoko: Ugutanga amashanyarazi, PCB crosstalk, ukudahuza kw'umuzigo, EMI, uguhinduka kw'ingendo y'ibikorwa, urusaku rwo guhindura icarimwe

Ibirango: Bishobora gusubirwamwo, bitari -ugusangira kwa Gaussian, bifise aho bigarukira, bishobora gukurwaho

Ikigereranyo: Isaha iriko irazunguruka ubudasiba; Ikosa rihagarara iyo ukunyiganyiga guhagaze

1.2 Guhungabana kw'imburakimazi (RJ)

Jitter idasanzwe, idashobora kumenyekana, kandi idafise urubibi rwo hejuru rwo hejuru, igereranya "urusaku rw'akameremere" rw'umuvuduko w'amabuye y'agaciro.

Inkomoko: Urusaku rw’ubushuhe, urusaku rw’uguca ibibatsi, uguhinduka kw’ibintu bitwara, n’ibindi bivugwa ku mubiri

Ibiranga: Ugusangira kwa Gaussian, ntigushobora gukurwaho burundu, kugabanywa gusa .

Ikigereranyo: Utuntu dutoduto duhinduka mu buryo busanzwe imbere mw’isaha ubwayo

1.3 Uguhungabana kwose (TJ)

Ivyiyumviro vy'ukuri vyose ni ugushira hamwe kw'ivyo bibiri. RMS ibiciro bihurizwa hamwe n'ukwongerako ububasha:TJRMS =RJRMS2 +DJRMS2

2. Ugomba-Kumenya amajambo y'ubuhinga: 4 Ibipimo vy'ingenzi vya Jitter

2.1 RMS Intambwe Jitter (Imburakimazi)

Irimwo gusa Jitter y'imburakimazi (RJ)

Iserukira urusaku rw'inzira y'imbere y'umuvuduko w'amabuye y'agaciro

Igaragaza uburyo bw'ikibiriti ubwaco, bitandukanye n'uguhungabana kw'umurongo

2.2 RMS Intambwe Jitter (Igitigiri cose)

Harimwo RJ + DJ

Igikoresho gikoreshwa cane c'inzira y'uguhungabana kigaragaza ibikorwa vy'ukuri-sisitemu

2.3 Igihe ca RMS Jitter

RMS gukevya kw'igihe c'ingendo imwe kuva ku burebure bw'ingendo nziza

Igaragaza igihe kirekire-ugushikama kw'ingendo

2.4 Inzinguzingu -ku -Inyingungungu (CC Jitter)

Guhinduka kw'itandukaniro hagati y'ingendo zibiri zifatanye

Igaragaza uguhinduka kw’aho nyene; biragoye cane ku mirongo y'umuvuduko mwinshi -

3. Ubucuti buri hagati y'ibipimo na DJ/RJ

Incamake y'ingenzi:

Gusa n'inzira y'imburakimazi=RJ isukuye

Abandi bose=RJ + uguhungabana kw'ibintu (DJ)

4. Gukoresha ubuhinga: Uko wosobanura no gutorera umuti ingorane

Gusuzuma uburyo bw'umuvuduko w'amabuye y'agaciro → suzuma RMS Phase Jitter (Imburakimazi)

Gusuzuma vy'ukuri -imikorere ya sisitemu → kugenzura RMS Phase Jitter (Igitigiri cose)

Ivyiyumviro vy'umuvuduko munini - (PCIe/USB) → kwibanda ku CC Jitter

Niba jitter irenze urugero, banza usuzume: ububasha, hasi, crosstalk, umuzigo (amasoko yose ya DJ)

5. Isano hagati ya Jitter n’Urusaku rw’Intambwe (Igihe ↔ Incuro)

5.1 Iciyumviro nyamukuru mu nteruro imwe

Urusaku rw'inzira=incuro-ikimenyetso c'intara

Inzira Jitter=igihe-ikimenyetso c'intara

Ni impande zibiri z’igiceri kimwe kandi zishobora guhindurwa zikaba izindi.

5.2 Amakete y'ingenzi

RMS Random Phase Jitter↔ iharurwa ataco ihinduye mu gushiramwo urusaku rw'inzira ku nzira y'uburebure bwasobanuwe

Ivyiyumviro vy'urusaku (DJ)↔ bihuye n'ibihimba vy'umubiri bitandukanye mu bijanye n'urusaku rw'inzira

Random Jitter (RJ)↔ ihuye n'urusaku rukomeza rwo hasi rw'urusaku rw'inzira

5.3 Guhindura ubuhinga

Gushiramwo urusaku rw’inzira L(f) ku nzira y’incuro zitandukanye bitanga RMS Phase Jitter.

Gutahura vyoroshe:

Urugero rw'urusaku rw'inzira → rugena ubunini bw'uguhungabana

Hasi & isongoye → guhungabana guto

Ivyuma (spurs) biraboneka → Ivyiyumviro vy’uguhungabana (DJ)

5.4 Gukora ikarita

Igitero c'urusaku rwo hasi → Igitero c'imburakimazi (RJ) (ntigishobora gukurwaho)

Ivyiyumviro vy’urusaku → Ivyiyumviro vy’urusaku (DJ) (bishobora gutorwa umuti)

Gushiramwo urusaku rwose → RMS Phase Jitter yose hamwe

6. Incamake y'iherezo

Jitter ifise ivyiciro bibiri:

DJ (Ivyiyumviro vy'Ivyiyumviro): uguhungabana kw'inyuma, gukurwaho

RJ (Random Jitter): urusaku rw'ikibiriti, rudashobora gukurwaho

Amaparametere asanzwe:

RMS Ivyiyumviro vy'Ivyiyumviro=RJ isukuye

RMS Igitigiri cose c'Ivyiyumviro=RJ + DJ

Igihe c'uguhungabana=kimwe -ugushikama kw'ingendo

CC Jitter=iri hafi -ihinduka ry'ingendo

Jitter ↔ Urusaku rw'inzira:

Urusaku rw'inzira (incuro) ↔ Jitter y'inzira (incuro)

Urusaku rwo hasi → RJ

Intsinzi → DJ

Ubufatanye bw'urusaku rw'inzira → butaziguye butanga RMS Intambwe Jitter