1. Ndeapi maitiro anofanira kutanga bhodhi redunhu DEBUG kubva?

Nezve maseketi edhijitari, tanga waona zvinhu zvitatu zvakarongeka:

1) Simbisa kuti masimba ese emagetsi anosangana nezvinodiwa zvekugadzira. Mamwe masisitimu ane akawanda emagetsi ekushandisa anogona kuda mamwe maitiro ekurongeka uye kumhanya kwemagetsi emagetsi.

2) Simbisa kuti ese masaini ewachi ma frequency ari kushanda nemazvo uye hapana matambudziko asiri emonotonic pamakona echiratidzo.

3) Simbisa kana chiratidzo chekugadzirisa zvakare chinosangana nezvinodiwa.

Kana izvi zvakajairika, chip inofanira kutumira chiratidzo chekutanga kutenderera (kutenderera). Tevere, gadzirisa zvinoenderana neanoshanda musimboti weiyo system uye bhazi protocol.

2. Muchiitiko chehukuru hwebhodhi redunhu, kana mamwe mabasa achida kuiswa mukugadzirwa, zvinowanzodiwa kuwedzera PCB trace density, asi izvi zvinogona kuwedzera kupindirana kwemaitiro, uye panguva imwe chete. , maronda akanyanya kutetepa uye iyo impedance Haikwanise kuderedzwa, ndapota zivisai hunyanzvi mune yakakwirira-kumhanya (> 100MHz) yakakwirira-density PCB dhizaini?

Paunenge uchigadzira yakakwirira-kumhanya uye yakakwirira-density PCBs, crosstalk interference (crosstalk interference) inoda kunyatsotariswa, nokuti ine simba guru pakuita nguva uye chiratidzo chekuvimbika. Heano zvimwe zvishoma zvekucherechedza:

1) Dzora kuenderera mberi uye kufananidzwa kwehunhu impedance ye wiring.

Saizi yekutevera spacing. Zvinowanzoonekwa kuti kupatsanurwa kwakapetwa kaviri upamhi hwemutsara. Zvinogoneka kuziva pesvedzero yekutsvagisa nzvimbo pane nguva uye chiratidzo chekuvimbika kuburikidza nekuenzanisa, uye kuwana iyo shoma inoshiviririka nzvimbo. Mhedzisiro yeakasiyana chip masaini anogona kunge akasiyana.

2) Sarudza nzira yakakodzera yekugumisa.

Dzivisa matinji maviri ari padyo ane nzira imwechete yewaya, kunyangwe paine mawaya anopindirana, nekuti rudzi urwu rwecrosstalk rwakakura pane iyo yepedyo wiring pane imwechete layer.

Shandisa mapofu / akavigwa vias kuwedzera nzvimbo yekutevera. Asi mutengo wekugadzira wePCB board uchawedzera. Zvakaoma zvechokwadi kuwana parallelism yakakwana uye urefu hwakaenzana mukuita chaiko, asi zvichiri kudikanwa kuita kudaro.

Uye zvakare, kumisa kusiyanisa uye kwakajairwa modhi kumisa kunogona kuchengetwa kuti kuderedze kukanganisa kwenguva uye chiratidzo chekuvimbika.

3. Kusefa pamagetsi eanalogi kunowanzoshandisa LC circuit. Asi nei kusefa kweLC kwakaipa kupfuura RC dzimwe nguva?

Kuenzanisa kweLC uye RC kusefa mhedzisiro kunofanirwa kufunga kana iyo frequency bhendi yekusefa uye kusarudzwa kweiyo inductance kwakakodzera. Nekuti inductance yeinductor (reactance) ine hukama neiyo inductance kukosha uye frequency. Kana iyo ruzha frequency yemagetsi yakaderera, uye inductance kukosha haina kukura zvakakwana, iyo yekusefa inogona kunge isina kunaka seRC.

Zvisinei, mari yekushandisa RC kusefa ndeyokuti resistor pachayo inoshandisa simba uye ine urombo husina kunaka, uye teerera kune simba iro rakasarudzwa rinopikisa rinogona kumira.