I-256 Frequency Divider, i-Input Frequency 0.3~30GHz

I-256 i-frequency divider yimodyuli yesekethe yedijithali enciphisa ukuphindaphinda kwesignali yegalelo kwi-1/256 ye-frequency yayo yasekuqaleni. Iimpawu zayo kunye nezicelo zezi zilandelayo:

Iimpawu:
1. I-coefficient yolwahlulo olukhulu lwamaza
I-frequency division ratio yi-256: 1, ilungele iimeko ezifuna ukunciphisa okubonakalayo okubonakalayo, njengokuvelisa iimpawu zokulawula i-low-frequency control esuka kwiiwotshi eziphezulu.
2. Ulwakhiwo lwe-trigger yamanqanaba amaninzi
Ngokwesiqhelo yenziwe ngamanqanaba esi-8 ezixhobo zokubala zokubini (ezifana ne-8-bit counters), njenge-2 ^ 8=256, iiflops ezininzi kufuneka zenziwe i-cascade, ezinokuzisa ukulibaziseka kwe-cascading.
3. Umjikelo womsebenzi wemveliso
Umjikelo womsebenzi weyona nto iphezulu imveliso yekhawuntari elula yi-50%, kodwa inqanaba eliphakathi linokuba li-asymmetric. Ukuba umjikelo opheleleyo we-50% womjikelo womsebenzi uyafuneka, ukusetyenzwa kwengqiqo okongeziweyo (okufana nengxelo okanye indibaniselwano yetsheyini yokuphindaphinda) iyafuneka.
4. Ukuzinza okuphezulu
Ngokusekwe kuyilo lwesekethe yedijithali, inokuchaneka okuphezulu okuphuma rhoqo, ayichatshazelwa kangako yimiba yokusingqongileyo efana nobushushu kunye nombane, kwaye ixhomekeke kuzinzo lomqondiso wegalelo.
5. Ukusetyenziswa kwamandla aphantsi kunye nokudibanisa
Itekhnoloji yale mihla ye-CMOS inosetyenziso oluphantsi lwamandla, kulula ukuyidibanisa kwi-FPGA, i-ASIC okanye i-microcontroller, kwaye ithatha izixhobo ezincinci.

Isicelo:
1. Inkqubo yonxibelelwano
I-Frequency synthesis: Kwi-loop evaliweyo yesigaba (i-PLL), i-frequency target frequency iveliswa ngokubambisana ne-oscillator elawulwa yi-voltage (VCO); I-oscillator yendawo (LO) ukwahlula amaza kwi-RF kwi-aplikeshini ye-RF yenza iifrikhwensi zamatshaneli amaninzi.
2. Ukulungiswa komqondiso wedijithali
I-Downsampling: Nciphisa ireyithi yesampulu ukunciphisa inani ledatha, esetyenziswa ngokudibeneyo nokucoca ukuchasana no-aliasing.
3. Izixhobo zexesha kunye nexesha
Kwiiwotshi zedijithali kunye namaxesha ombane, i-crystal oscillator (efana ne-32.768kHz) ihlukaniswe kwi-1Hz ukuqhuba isandla sesibini.
Ukulibaziseka kokuqalisa okanye ukucwangciswa komsebenzi ngamaxesha athile kulawulo lwamashishini.
4. Izixhobo zokuvavanya kunye nemilinganiselo
Ijeneretha yesiginali ivelisa imiqondiso yovavanyo oluphantsi-frequency okanye isebenza njengemodyuli yereferensi yolwahlulo lwamaza emitha.