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

I-256 frequency divider yimodyuli yesekethe yedijithali enciphisa i-frequency yesignali yokufaka ukuya kwi-1/256 ye-frequency yayo yokuqala. Iimpawu kunye nokusetyenziswa kwayo zezi zilandelayo:

Iimpawu:
1. I-coefficient enkulu yokwahlulahlula i-frequency
Umlinganiselo wokwahlulwa kwamaza yi-256:1, ofanelekileyo kwiimeko ezifuna ukunciphisa kakhulu amaza, njengokuvelisa imiqondiso yolawulo lwamaza aphantsi ukusuka kwiiwotshi zamaza aphezulu.
2. Ulwakhiwo lwe-trigger yamanqanaba amaninzi
Ngokwesiqhelo zenziwe zii-8-level binary counters (ezifana nee-8-bit counters), njenge-2 ^ 8=256, kufuneka kufakwe ii-multiple flip flops, nto leyo enokufaka i-cascading delay.
3. Umjikelo womsebenzi wokuphuma
Umjikelo womsebenzi we-bit output ephezulu ye-simple binary counter yi-50%, kodwa inqanaba eliphakathi lisenokuba alilingani. Ukuba umjikelo opheleleyo we-50% womsebenzi uyafuneka, kufuneka ukucubungula i-logic eyongezelelweyo (njengokudityaniswa kwempendulo okanye i-frequency chain).
4. Uzinzo oluphezulu
Ngokusekelwe kuyilo lwesekethe yedijithali, inokuchaneka okukhulu kwemvamisa yokukhupha, ayichaphazeleki kakhulu ziimeko zokusingqongileyo ezifana nobushushu kunye ne-voltage, kwaye ixhomekeke kuzinzo lwesignali yokufaka.
5. Ukusetyenziswa kwamandla aphantsi kunye nokudibanisa
Itekhnoloji ye-CMOS yanamhlanje isetyenziswa kancinci ngamandla, kulula ukuyidibanisa ne-FPGA, i-ASIC okanye i-microcontroller, kwaye ithatha izixhobo ezimbalwa.

Isicelo:
1. Inkqubo yonxibelelwano
Ukwenziwa kwamaza ombane: Kwi-phase-locked loop (PLL), i-target frequency iveliswa kunye ne-voltage controlled oscillator (VCO); Ukwahlulwa kwamaza ombane e-local oscillator (LO) kwi-RF applications kuvelisa amaza ombane amaninzi.
2. Ukucubungula isignali yedijithali
Ukunciphisa iisampulu: Nciphisa izinga lesampulu ukuze kuncitshiswe ubungakanani bedatha, esetyenziswa kunye nokucoca okuchasene nokwahlulahlula.
3. Izixhobo zokubala ixesha kunye nexesha
Kwiiwotshi zedijithali kunye nee-timers ze-elektroniki, i-crystal oscillator (efana ne-32.768kHz) yahlulwe yaba yi-1Hz ukuze iqhube ngesandla sesibini.
Ukulibaziseka okubangela ukulibaziseka okanye ukucwangciswa kwemisebenzi rhoqo kulawulo lwemizi-mveliso.
4. Izixhobo zokuvavanya nokulinganisa
Ijenereyitha yesignali ivelisa imiqondiso yovavanyo olune-frequency ephantsi okanye isebenza njengemodyuli yokwahlula i-frequency parameter kwimitha ye-frequency.