Sebenzisa i-IC elula ukwandisa ubomi bebhetri kwifowuni yakho

ଲେଖକ: ଆଇଫ୍ଲୋପାୱାର - អ្នកផ្គត់ផ្គង់ស្ថានីយ៍ថាមពលចល័ត

Ukunciphisa ukusetyenziswa kwamandla efowuni kunye nokwandisa ubomi bebhetri yinjongo yenjineli yoyilo lwefowuni nganye. Iinjineli zoyilo zihlala zongeza abadlali beMP3, iikhamera, kunye neevidiyo ezigcweleyo zeemoto ezinjengeeselfowuni zanamhlanje, eziya kuqhubeka nokunciphisa ukusetyenziswa kwamandla. Ukunciphisa amandla ombane ombane wefowuni ephathwayo i-chip ebalulekileyo (efana ne-analog baseband chip kunye ne-digital baseband chip) - inokuba yi-2.

I-8V okanye i-1.8V - indlela yokunciphisa ukusetyenziswa kwamandla. Kodwa xa injineli yoyilo kufuneka igcine itshiphu enye okanye ezingaphezulu zenkxaso ezinomthamo ophezulu wokubonelela, kukho ingxaki.

Eyona nto ixhaphakileyo kukuba umsebenzi owongezelelweyo wee-smartphones uya kuba phezulu. Omnye wemizekelo yeringithoni yomtya, kuba uluhlu lwencopho yophawu lomsindo lumalunga ne-3.2V, ke isekethe eyenzeka kwaye isasaza le ringtone idla ngokuba yi-4.

2V amandla ombane ombane. Ngale ndlela, iingxaki zenzeka kwi-interface phakathi kwe-baseband kunye neesekethe zeringithoni. Ukubonisa le ngxaki, kufuneka sisebenzise utshintsho lwe-analog ukutshintsha ilizwi okanye iringithoni kwisithethi njengomzekelo.

Ukuze ukuguqula ezi ntlobo zimbini zeesekethe kwibhloko enye (PCB), ukusetyenziswa kwamandla kusetyenziswa, okanye umbane ophantsi wombane wedijithali logic drive analog switch kwi-baseband chip isetyenziswa. Nangona kunjalo, kufuneka kuqatshelwe ukuba le ndlela yokugqibela inokulahlekelwa ukusetyenziswa kwamandla afunyenwe kwi-baseband chip yokunciphisa amandla ombane ombane, kuba xa i-analog switch isebenza kwimo engafanelekanga, kuya kubakho ubuninzi be-perfusion yangoku. Enye indlela elula yokusombulula le ngxaki kukutshintsha ingqiqo yedijithali ukusuka kwi-baseband chip ukugcina i-baseband chip ukugcina amandla usebenzisa i-1.

I-8V yombane, kodwa le ndlela kufuneka ibe ngumqhubi we-voltage ephezulu kufuneka isebenze kumbane ophezulu. Nayiphi na itshiphu kwifowuni yakho. Ukuze uchaze ngakumbi le ndlela, indlela yokulinganisa umguquli, makhe sibone apho umbane uhamba khona ngokwenene.

Njengoko kubonisiwe kwi-Figure 1, igalelo ledijithali lokutshintsha kwe-analog yi-buffer esisiseko ye-CMOS equka i-PMOS kunye ne-NMOS transistors exhunywe kwi-inverter. Yongeza isignali kwi-I / P ye-pin yegalelo le-buffer. Xa i-voltage yegalelo iphezulu kune-input voltage high (VIH), i-voltage ye-output ye-buffer yi-VDD (i-voltage yonikezelo lwamandla), xa i-voltage yegalelo ingaphantsi kwe-voltage ephantsi (VIL), i-voltage ye-output ye-buffer yi-GND (umhlaba).

Oku kuqinisekisa ukuba i-voltage yesango yokutshintsha kwe-analog yi-voltage yomthombo wamandla, ngaloo ndlela yenza uluhlu lwalo lwesignali. Ukubekwa esweni ngaxeshanye kwegophe lophawu lwe-IV oluboniswe kuMfanekiso 2 ngelixa ubeka iliso kwi-voltage yegalelo ukusuka kwi-0 ukuya kwi-VDD yokuskena igalelo lombane. Xa igalelo lombane lilo naliphi na i-voltage yokuphela kwamandla ombane ombane, i-IDD yehla ukuya kubuncinci (0μA).

Nangona kunjalo, xa igalelo lombane lisondele kwindawo yokutsiba ye-buffer, i-IDD yonyuke kakhulu. Ngoko ke, xa i-voltage ye-digital input isetyenziswe kwi-I / P end yi-voltage yomthombo wamandla, iswitshi ye-analog isebenzisa ubuncinane bokusetyenziswa kwamandla. Ijika lophawu linophawu lwegophe ngenxa ye-NMOS kunye neetyhubhu zokutshintsha ze-PMOS ezisetyenziswe kuyilo lwe-buffer, eneneni njengesixhobo sokulawula amandla ombane.

Iimpawu zezi chips zilandelayo: VGS> VT-> Transistor Tube Tutor I-VGS i-transistor icinyiwe ukuba yenze i-voltage threshold, kwaye i-channel conductive yenziwa phakathi komthombo kunye ne-drain xa i-voltage iphezulu kune-voltage. NMOS transistor Vt yi 0.9V, PMOS transistor Vt yi -0.

9V. Ngoko ke, xa i-voltage yegalelo i-0V, i-PMOS (M1) ikwimo, kwaye umphumo wesigaba sokuqala yi-VDD. Kwinqanaba lesibini, isixhobo se-NMOS (M5) sikwimo apho i-buffer inesiphumo esipheleleyo se-0V.

I-voltage ye-buffer input inyuka (ngaphambi kokufikelela kwinqanaba eliphezulu langoku) kubangele ukuxhatshazwa kwe-M1 (i-M1 iqale ukucima) kunye ne-m5 yokunciphisa i-impedance (i-M5 yaqala ukuvula), ngoko siya kubona i-VDD kunye ne-GND. Ijelo le-hyper-impedance lenziwe. Ukonyusa ngakumbi i-voltage yegalelo kuya kubangela i-transistor enye kuphela kwigalelo kunye ne-output transistor pairs of the buffer.

Sisebenzisa le migaqo ingasentla ukuqhubeka nokuhlalutya iimeko zokutshintsha kwe-analog, cinga ukusebenzisa iiswitshi ze-analog ADG884 ze-Adi ukutshintshela phakathi kwamakhonkco efowuni ejikelezayo kunye nentetho. Isignali yokulawula ukusuka kwi-digital baseband chip yi-1.8V.

Njengoko kubonisiwe kwi-FIG. I-2, ukuba ukutshintshwa okufanisiweyo kuqhutywe ngokuthe ngqo kunye nesignali yedijithali ye-1.8V, umbane okhoyo ngoku kufuneka ube yi-120μA.

Ukuba i-voltage yedijithali yegalelo lokutshintsha kwe-analog ingaphezulu kwe-3.8V, ke ukusetyenziswa kwamandla kufuneka kube yi-0. Ngoko ke, ukwenzela ukuba utshintsho lwe-analog lusebenze kwindawo yamandla ephantsi, isignali yedijithali ye-digital baseband chip iguqulela kumbane ophezulu.

Iphakheji ye-Adi ye-SC70 ye-ultra-encinci kwaye idla ngokudla kuphela i-0.1μA yangoku, njengoko i-converter yezinga ifanelekile kakhulu kulo msebenzi. Njengoko kubonisiwe kwi-FIG.

I-3, inokudityaniswa kumbane wobonelelo lwamandla we-baseband chip kunye nombane wobonelelo lwamandla weswitshi ye-analog kunye nokuguqula inqanaba lengqiqo phakathi kweetshiphusi ezimbini. Ngokuqinisekileyo, ukutshintshwa kwe-analog kulo mzekelo ungasentla kunokuba nayiphi na i-chip esebenza kumbane ophezulu. Iifowuni eziphathwayo zangoku zineesekethe ezininzi ezidityanisiweyo ze-CMOS (ii-ICs) ukugqiba imisebenzi eyahlukeneyo, enje ngeaudio kunye nevidiyo kunye neekhamera zedijithali.

Ezi ICs zidla ngokusebenza phantsi kwawo nawaphi na amandla ombane phakathi kwe-5V ukuya kwi-1.8V, ngamanye amaxesha nokuba amandla ombane asezantsi. Ngamafutshane, sisebenzisa amanqanaba okugcina amandla ukwandisa ubomi bebhetri.

Ezi zinto zilandelayo kufuneka ziqwalaselwe: iifowuni eziphathwayo ezisezantsi zihlala zisebenzisa i-600mAh umthamo webhetri. Ixesha lokulinda ibhetri yefowuni ephantsi yiyure ezingama-300 (HR), kwaye i-nominal current yi-2mA. Ukuba utshintsho lwenqanaba alukwenziwanga, ukutshintshwa kwe-analog esetyenziswe kulo mzekelo kuya kubamba i-4 yangoku.

I-8%, kodwa ukuba kuphela inqanaba elingentla liguqulwa, kuphela i-0.04% yangoku ithathwa.