Sebenzisa i-IC elula ukuze unwebe impilo yebhethri yefoni yakho

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Yehlisa ukusetshenziswa kwamandla kamakhalekhukhwini futhi wandise impilo yayo yebhethri kuwumgomo wonjiniyela ngamunye wokuklama umakhalekhukhwini. Onjiniyela bokuklama bahlala bengeza izidlali zeMP3, amakhamera, namavidiyo agcwele ezimoto afana nomakhalekhukhwini besimanje, okuzoqhubeka nokunciphisa ukusetshenziswa kwamandla. Yehlisa amandla kagesi e-chip ebalulekile yeselula (njenge-analog baseband chip ne-digital baseband chip) - ingaba ngu-2.

I-8V noma i-1.8V - indlela yokunciphisa ukusetshenziswa kwamandla. Kodwa uma unjiniyela wokuklama kufanele agcine i-chip eyodwa noma amaningi asekelayo anama-voltage aphezulu, kunenkinga.

Okuvame kakhulu ukuthi umsebenzi owengeziwe wama-smartphones uzoba phezulu. Esinye sezibonelo iringithoni yeyunithi yezinhlamvu, njengoba ububanzi besignali yomsindo bucishe bube ngu-3.2V, ngakho-ke isekethe eyenzeka futhi edlulisa le ringtone ngokuvamile iba ngu-4.

I-voltage ye-voltage ye-2V. Ngale ndlela, izinkinga zenzeka esibonakalayo phakathi kwe-baseband nesekhethi yeringithoni. Ukukhombisa le nkinga, kufanele sisebenzise iswishi ye-analog ukushintsha izwi noma iringithoni kusipika njengesibonelo.

Ukuze kuguqulwe lezi zinhlobo ezimbili zamasekhethi kubhulokhi efanayo (PCB), ukusetshenziswa kwamandla kuyasetshenziswa, noma kusetshenziswa iswishi ye-analog yedijithali yedijithali ephansi ye-analog ku-chip ye-baseband. Kodwa-ke, kufanele kuqashelwe ukuthi le ndlela yokugcina ingase ilahlekelwe ukusetshenziswa kwamandla okutholwe ku-chip ye-baseband ukuze kuncishiswe i-voltage yokunikezwa kwamandla, ngoba uma ukushintshwa kwe-analog kusebenza kwimodi engalungile, kuzoba khona ukugcwaliswa okuningi kwamanje. Enye indlela elula yokuxazulula le nkinga ukushintsha i-logic yedijithali kusuka ku-chip ye-baseband ukuze ulondoloze i-baseband chip ukuze wonge amandla usebenzisa u-1.

I-voltage engu-8V, kodwa le ndlela kufanele ibe umshayeli we-voltage ephezulu kufanele asebenze ku-voltage ephezulu. Noma iyiphi i-chip efonini yakho. Ukuze uqhubeke uchaza le ndlela, indlela yokulinganisa isiguquli, ake sibone ukuthi i-current igeleza kuphi ngempela.

Njengoba kuboniswe kuMfanekiso 1, okokufaka kwedijithali kweswishi ye-analog iyibhafa eyisisekelo ye-CMOS ehlanganisa ama-transistors e-PMOS kanye ne-NMOS axhunywe kusiguquli. Engeza isignali kuphinikhodi yokufaka ye-I / P yebhafa. Lapho i-voltage yokufakwayo ingaphezu kwe-voltage ephezulu yokufaka (VIH), i-voltage ephumayo ye-buffer yi-VDD (i-voltage yokuphakela amandla), lapho i-voltage yokufaka ingaphansi kwe-voltage ephansi yokufaka (VIL), i-voltage ephumayo ye-buffer yi-GND (umhlabathi).

Lokhu kuqinisekisa ukuthi i-voltage yesango yokushintshwa kwe-analog iyi-voltage yomthombo wamandla, ngaleyo ndlela yenza ububanzi besiginali yayo. Ukuqapha ngesikhathi esisodwa ijika lesici se-IV eliboniswe kuMfanekiso 2 ngenkathi kuqapha i-voltage yokufaka isuka ku-0 iye ku-VDD yokufaka ivolthi yokufaka yokuskena. Uma i-voltage yokufaka iyinoma iyiphi i-voltage yokugcina ye-voltage yokuphakela amandla, i-IDD yehla ibe ngaphansi (0μA).

Kodwa-ke, lapho i-voltage yokufaka iseduze nendawo yokugxuma ye-buffer, i-IDD inyuke kakhulu. Ngakho-ke, lapho i-voltage yokufaka yedijithali esetshenziswa ekugcineni kwe-I / P kuyi-voltage yomthombo wamandla, isishintshi se-analog sisebenzisa amandla amancane asetshenziswayo. Ijika lesici linejika lesici ngenxa yamashubhu okushintsha e-NMOS kanye ne-PMOS asetshenziswa ekwakhiweni kwebhafa, empeleni njengesibambiso sokulawula i-voltage.

Izici zalawa ma-chips zimi kanje: VGS> VT-> Transistor Tube Tutor I-VGS transistor ivaliwe ukuze yakhe i-threshold voltage, futhi i-conductive channel yakheka phakathi komthombo kanye ne-drain lapho i-voltage iphakeme kune-voltage. I-NMOS transistor Vt ingu-0.9V, i-PMOS transistor Vt ingu-0.

9V. Ngakho-ke, lapho i-voltage yokufaka ingu-0V, i-PMOS (M1) isesimweni, futhi okukhiphayo kwesigaba sokuqala yi-VDD. Esigabeni sesibili, idivayisi ye-NMOS (M5) isesimweni lapho isilondolozi sinokukhipha okuphelele okungu-0V.

I-voltage ye-buffer input ikhuphuka (ngaphambi kokufinyelela kumthamo omkhulu wamanje) ibangele ukuvinjelwa kwe-M1 (i-M1 iqala ukucisha) kanye ne-m5 yokwehla kwe-impedance (i-M5 yaqala ukuvula), khona-ke sizobona i-VDD ne-GND. Isiteshi se-Hyper-impedance sakhiwe. Ukwenyusa i-voltage yokufaka kuzodala i-transistor eyodwa kuphela kumapheya e-transistor okokufaka nokukhiphayo webhafa.

Sisebenzisa lezi zimiso ezingenhla ukuze siqhubeke nokuhlaziya izimo zokushintshwa kwe-analogi, cabanga ukusebenzisa amaswishi e-analog ye-ADG884 ye-Adi ukuze sishintshe phakathi kwezindandatho zokuphotha kwefoni ephathekayo nenkulumo. Isiginali yokulawula kusuka ku-digital baseband chip ingu-1.8V.

Njengoba kuboniswe ku-FIG. 2, uma ukushintsha okufanisiwe kushayelwa ngokuqondile isignali yedijithali engu-1.8V, amandla amanje kufanele abe ngu-120μA.

Uma i-voltage yokufaka yedijithali yeswishi ye-analog ingaphezu kuka-3.8V, khona-ke ukusetshenziswa kwamandla kufanele kube ngu-0. Ngakho-ke, ukuze kwenziwe iswishi ye-analog isebenze endaweni yamandla aphansi kakhulu, isignali yedijithali ye-digital baseband chip izoguqulela ku-voltage ephezulu.

Iphakheji elincane kakhulu le-Adi&39;s SC70 futhi ngokuvamile lisebenzisa kuphela u-0.1μA wamanje, njengesiguquli sezinga siwufanelekela kakhulu lo msebenzi. Njengoba kuboniswe ku-FIG.

3, ingaxhunywa ku-voltage yokuphakelwa kwamandla we-chip ye-baseband kanye ne-voltage yokuphakela amandla yeswishi ye-analog futhi iguqule ileveli enengqondo phakathi kwama-chips amabili. Vele, ukushintshwa kwe-analog esibonelweni esingenhla kungaba yinoma iyiphi i-chip esebenza ngama-voltage aphezulu. Omakhalekhukhwini besimanje bahlanganisa amasekhethi amaningi ahlanganisiwe e-CMOS (ama-IC) ukuze aqedele imisebenzi eyahlukene, njengamakhamera alalelwayo namavidiyo namakhamera edijithali.

Lawa ma-IC ngokuvamile asebenza ngaphansi kwanoma iyiphi i-voltage ephakathi kuka-5V kuya ku-1.8V, ngezinye izikhathi ngisho ne-voltage ephansi kagesi. Kafushane, sisebenzisa amaleveli wamandla okonga ukuze sandise impilo yebhethri.

Izinto ezilandelayo kufanele zicatshangelwe: amafoni omakhalekhukhwini asezingeni eliphansi ngokuvamile asebenzisa umthamo webhethri ongu-600mAh. Isikhathi sokulinda ibhethri sefoni esezingeni eliphansi amahora angama-300 (HR), futhi amandla ayo okuzisholo wona ngu-2mA. Uma ukushintshwa kweleveli kungenziwanga, iswishi ye-analog esetshenziswe kulesi sibonelo izomunca okwamanje okungu-4.

8%, kodwa uma kuphela izinga elingenhla liguqulwa, kuphela i-0.04% yamanje emuncwayo.