256 Frequency Divider, Nako ea ho Kena 0.3~30GHz

A 256 frequency divider ke mochini oa potoloho oa dijithale o fokotsang maqhubu a lets'oao le kenang ho 1/256 ea maqhubu a lona a mantlha. Litšobotsi le tšebeliso ea eona ke tse latelang:

Litšobotsi:
1. Coefficient e kholo ea karohano ea maqhubu
Karolelano ea karohano ea maqhubu ke 256: 1, e loketseng maemo a hlokang ho fokotseha ho hoholo, joalo ka ho hlahisa mats'oao a taolo ea maqhubu a tlase ho tsoa lioacheng tse phahameng haholo.
2. Multi-level trigger structure
Hangata e entsoe ka li-binary counters tse 8-level (joalo ka 8-bit counters), joalo ka 2 ^ 8=256, li-flip flops tse ngata li hloka ho hlajoa, e leng se ka hlahisang tieho.
3. Poelo ea mosebetsi oa tlhahiso
Mosebetsi oa potoloho ea karolo e phahameng ka ho fetisisa ea k'haontareng e bonolo ea binary ke 50%, empa mokhahlelo o bohareng o kanna oa ba oa asymmetric. Haeba potoloho e felletseng ea 50% e hlokahala, ts'ebetso e eketsehileng ea logic (joalo ka maikutlo kapa motsoako oa ketane ea maqhubu) ea hlokahala.
4. Botsitso bo phahameng
E ipapisitse le moralo oa potoloho ea dijithale, e na le ho nepahala ha maqhubu a phahameng, ha e amehe haholo ke maemo a tikoloho joalo ka mocheso le motlakase, 'me e itšetleha ka botsitso ba matšoao a ho kenya.
5. Tšebeliso e tlaase ea matla le ho kopanya
Theknoloji ea sejoale-joale ea CMOS e na le tšebeliso e tlase ea matla, e bonolo ho e kenyelletsa ho FPGA, ASIC kapa microcontroller, 'me e nka lisebelisoa tse fokolang.

Kopo:
1. Mokhoa oa puisano
Frequency synthesis: Ka phaposi-locked loop (PLL), lebelo la sepheo le hlahisoa hammoho le oscillator e laoloang ke motlakase (VCO); Karohano ea frequency ea Local oscillator (LO) lits'ebetsong tsa RF e hlahisa maqhubu a likanale tse ngata.
2. Ts'ebetso ea pontšo ea digital
Downsampling: Fokotsa sekhahla sa sampole ho fokotsa palo ea data, e sebelisoang mmoho le sefa anti aliasing.
3. Lisebelisoa tsa nako le nako
Ka lioache tsa dijithale le li-timers tsa elektroniki, kristale oscillator (joalo ka 32.768kHz) e arotsoe ho 1Hz ho khanna letsoho la bobeli.
Ho lieha ho qala kapa ho etsa kemiso ea nako le nako taolong ea indasteri.
4. Lisebelisoa tsa ho hlahloba le ho lekanya
Jenereithara ea lets'oao e hlahisa matšoao a tlhahlobo ea maqhubu a tlase kapa e sebetsa e le mojule oa tšupiso ea frequency divider bakeng sa meter ea frequency.