Ungayakha kanjani 4-ungqimba PCB i-stack

Ngokombono, kunezinketho ezintathu.

Inqubo 1:

Ungqimba wokuphakelwa kwamandla, ungqimba lomhlabathi nezendlalelo ezimbili zamasiginali zihlelwe kanjena:

TOP (ungqimba lwesiginali); L2 (ukwakheka); I-L3 (ungqimba wokuphakelwa kwamandla); I-BOT (ungqimba lwesiginali).

Uhlelo 2:

Ungqimba wokuphakelwa kwamandla, ungqimba lomhlabathi nezendlalelo ezimbili zamasiginali zihlelwe kanjena:

TOP (ugesi ungqimba); L2 (ungqimba wesiginali); L3 (Isendlalelo sesiginali; I-BOT (phansi).

Uhlelo 3:

Ungqimba wokuphakelwa kwamandla, ungqimba lomhlabathi nezendlalelo ezimbili zamasiginali zihlelwe kanjena:

TOP (ungqimba lwesiginali); L2 (ungqimba wamandla); I-L3 (umugqa oxhuma); I-BOT (ungqimba lwesiginali).

Isendlalelo sesiginali

Phansi

amandla

Isendlalelo sesiginali

Yini inzuzo nobubi balezi zinketho ezintathu?

Inqubo 1, isitaki esikhulu sezingqimba ezine ze-PCB design, kukhona umhlabathi ngaphansi kwendawo yengxenye, isignali eyisihluthulelo ungqimba olungcono kakhulu lwe-TOP; Ngezilungiselelo zokujiya kwesendlalelo, kunconywa lezi zincomo ezilandelayo: Amapuleti wokulawula i-impedance (i-GND kuya ku-POWER) akufanele abe mkhulu kakhulu ukwehlisa i-impedance esatshalalisiwe yamandla we-POWER kanye nesisekelo; Qinisekisa ukuqhuma kwendiza yamandla.

Inqubo yesi-2, ukuze kuzuzwe umphumela othile wokuvikela, ukunikezwa kukagesi kanye nokubekwa phansi kubekwa kuzendlalelo ze-TOP ne-BOTTOM. Noma kunjalo, uhlelo kumele lufinyelele kumphumela wokufihla oyifunayo. Okungenani amaphutha alandelayo akhona:

1, ukunikezwa kwamandla nomhlabathi kuqhelelene kakhulu. I-impedance yendiza inkulu kakhulu.

2, ngenxa yethonya le-pad yengxenye, ukunikezwa kwamandla nokusekelwa akuphelele kakhulu. Ukuvinjelwa kwesiginali kuyayeka ngenxa yendawo engaphelele yokubhekisela.

Ngokwenza njalo, ukunikezwa kwamandla nokusekelwa kwesixazululo kunzima ukukusebenzisa njengebhanoyi eliphelele lenkomba ngenxa yenani elikhulu lamadivayisi abekwe ngaphezulu. Umphumela olindelwe wokuvikela uvikeleke kakhulu. Kunzima ukukusebenzisa; Ukusetshenziswa kwayo kunomkhawulo. Kodwa-ke, kuyindlela enhle yokubeka ungqimba ebhodini elilodwa lesifunda.

Inqubo 3, efana nenqubo 1, isetshenziswa lapho kubekwa khona okokusebenza okuyinhloko nge-BOTTOM noma i-base signal wiring.