Moralo oa Mastering Controlled Impedans oa Liboto tsa PCB

Tsebisa:

Mehleng ea kajeno ea mahlale a potlakileng, moralo oa PCB o bapala karolo ea bohlokoa ho netefatseng ts'ebetso e nepahetseng le bots'epehi ba matšoao. Karolo ea bohlokoa ea moralo oa PCB ke ts'ebetso e laoloang, e bolelang bokhoni ba ho boloka khanyetso e nepahetseng potolohong.Ho blog ena, re hlahloba menyetla ea moralo o laoloang oa impedance ho liboto tsa potoloho tsa PCB le kamoo Capel, moetapele oa indasteri ea tšeptjoang ea nang le boiphihlelo ba lilemo tse 15, a sebelisang boiphihlelo ba hae bo matla ho fihlela litholoana tse holimo.

Ithute ka moralo o laoloang oa impedance:

Moralo o laoloang oa impedance o bohlokoa bakeng sa lits'ebetso tse lebelo le holimo kaha o netefatsa ts'ebetso le bophelo bo bolelele ba lisebelisoa tsa elektroniki. Impedance ke khanyetso eo potoloho e fanang ka eona ho phallo ea alternating current (AC). E bapala karolo ea bohlokoa ho bapisa litšobotsi tsa mats'oao lipakeng tsa likarolo, ho fokotsa ho sotha ha matšoao, le ho netefatsa phetiso e nepahetseng ea data.

Bohlokoa ba moralo o laoloang oa impedance:

Libotong tsa potoloho ea PCB, ho boloka impedance e laoloang ke ea bohlokoa ho thibela ho senyeha ha lets'oao ka lebaka la ho se lumellane ha impedance. Ha impedance e sa laoloe ka nepo, ho nahanisisa le ho sotha ha matšoao ho ka etsahala, ho baka bobolu ba data mme qetellong ho ama ts'ebetso ea sistimi eohle ea elektroniki.

Botšepehi ba matšoao bo bohlokoa haholo lits'ebetsong tse potlakileng joalo ka litsi tsa data, likhokahano tsa mehala le lisebelisoa tsa elektronike tsa bareki. Ho hloleha ho fihlella impedance e laoloang ho ka fella ka ho fokotseha ha litefiso tsa data, ho eketseha ha litekanyetso tsa liphoso, le litaba tsa EMI, tse amang ts'epo le boleng ba sehlahisoa ka kakaretso.

Tsebo ea taolo ea impedance ea Capel:

Ka lilemo tse fetang 15 tsa boiphihlelo indastering ea boto ea potoloho, Capel e se e le molekane ea tšeptjoang bakeng sa litlhoko tse rarahaneng tsa moralo oa PCB. Boitseanape bo matla ba k'hamphani le boitlamo ba ho fana ka boleng bo ikhethang bo ba entse litsebi tsa moralo o laoloang oa impedance.

Tsebo e felletseng ea Capel ea litekanyetso tsa indasteri tse kang IPC-2221, IPC-2141 le IPC-2251 e ba lumella ho etsa liboto tsa potoloho tsa PCB ka tlhokomelo e khethehileng ho taolo ea impedance. Ba utloisisa ho rarahana ha lithapo tsa phetisetso, lisebelisoa tsa dielectric, bophara ba pina, sebaka, le lintlha tse ling tse amang tšitiso.

Mokhoa oa ho Rala oa Capel's Controlled Impedance Design:

Ho fihlela moralo o laoloang oa impedance, Capel o sebelisa lisebelisoa tse tsoetseng pele tsa software ho etsisa, ho sekaseka le ho ntlafatsa sebopeho sa PCB. Ka ho sebelisa software ea ketsiso ea 3D EM, lisebelisoa tsa tlhahlobo ea botšepehi ba matšoao le li-calculator tsa impedance, Capel e netefatsa hore liboto tsa PCB tse hlophisitsoeng li bonts'a litšobotsi tse ts'oanang tsa ts'ebetso.

Baenjiniere ba nang le litsebo ba Capel ba sebelisa mekhoa e fapaneng ea ho laola ka mokhoa o nepahetseng ho se sebetse. Ba rala mehala ea phetisetso ka hloko, ba ela hloko bolelele ba bona, bophara, le ho feto-fetoha ha dielectric tsa thepa e sebelisoang. Ntle le moo, ba sebelisa lipara tse fapaneng tse nang le li-impedances tse tšoanang ho fokotsa crosstalk le ho netefatsa phetiso e nepahetseng ea matšoao.

Mehato e thata ea taolo ea boleng ba Capel e kenyelletsa tlhahlobo e tebileng ea impedance ho pholletsa le ts'ebetso eohle ea tlhahiso. Ba sebelisa lisebelisoa tse nepahetseng haholo tsa TDR (Time Domain Reflectometry) ho netefatsa boleng ba impedance le ho boloka maemo a hlokahalang a impedance.

Melemo ea moralo oa impedance o laoloang ke Capel:

Ka ho sebelisana le Capel bakeng sa moralo o laoloang oa impedance, bareki ba fumana melemo e mengata ea bohlokoa:

1. Botšepehi bo ntlafetseng ba pontšo:Boitseanape ba Capel bo netefatsa hore botšepehi ba matšoao boa bolokoa, ho fokotsa kotsi ea ho sotha ha matšoao le bobolu ba data.
2. Ts'ebetso e nepahetseng:Taolo e nepahetseng ea impedance e ka eketsa litefiso tsa data, ea fokotsa sekhahla sa liphoso, le ho ntlafatsa ts'ebetso e akaretsang ea lisebelisoa tsa elektroniki.
3. Botšepehi bo ntlafetseng:Ka ho tlosa ho se lumellane ha impedance le lipontšo tsa lipontšo, moralo oa Capel o ntlafatsa ts'epahalo ea sehlahisoa mme o fokotsa monyetla oa ho hloleha kapa ho hloleha.
4. Phokotso ea EMI:Taolo e nepahetseng ea impedance e thusa ho fokotsa tšitiso ea motlakase (EMI) le ho ntlafatsa ho latela melao ea EMC (electromagnetic comppatibility).
5. Nako e potlakileng ea ho rekisa:Ho sebelisa lisebelisoa tse tsoetseng pele tsa software le mekhoa e ntlafalitsoeng ea Capel ho potlakisa nako e hlokahalang bakeng sa moralo le tlhahiso ea PCB, e leng se etsang hore lihlahisoa li hlahisoe ka potlako.

Ha re phethela:

Moralo o laoloang oa impedance ke karolo ea bohlokoa ea liboto tsa potoloho ea PCB ho netefatsa boits'oaro le ts'ebetso e nepahetseng ea matšoao. Ka boiphihlelo ba lilemo tse 15 le boiphihlelo bo matla, Capel e se e le molekane ea ratoang oa indasteri bakeng sa ho phethahatsa litlhoko tsa moralo o laoloang oa impedance. Ka ho sebelisa lisebelisoa tse tsoetseng pele tsa software le ho ela hloko lintlha tse ngata, Capel e lula e fana ka liboto tsa boleng bo holimo tsa PCB tse fihlelang lintlha tse hlokoang ka ho fetisisa tsa taolo ea impedance. Tšepa Capel ho ntlafatsa boiphihlelo ba bona ho lebisa sistimi ea hau ea elektroniki katlehong ka moralo o laoloang o phahameng oa impedance.