256 Frequency Divider, Kulowetsa pafupipafupi 0.3 ~ 30GHz

Chogawa ma frequency a 256 ndi gawo la digito lomwe limachepetsa ma frequency a chizindikiro cholowera kufika pa 1/256 ya ma frequency ake oyambirira. Makhalidwe ake ndi ntchito zake ndi awa:

Makhalidwe:
1. Chiwerengero chachikulu cha magawano afupipafupi
Chiŵerengero cha kugawa ma frequency ndi 256:1, choyenera zochitika zomwe zimafuna kuchepetsa kwambiri ma frequency, monga kupanga ma signal owongolera ma frequency otsika kuchokera ku mawotchi apamwamba.
2. Kapangidwe ka choyambitsa cha magawo ambiri
Kawirikawiri imakhala ndi ma counter a binary a level 8 (monga ma counter a 8-bit), monga 2 ^ 8=256, ma flip flops angapo amafunika kuchotsedwa, zomwe zingayambitse kuchedwa kwa cascading.
3. Nthawi yotulutsa ntchito
Kuzungulira kwa ntchito ya binary counter yotsika kwambiri ndi 50%, koma gawo lapakati lingakhale losafanana. Ngati pakufunika kuzungulira kwa ntchito ya 50%, kukonza kwa logic yowonjezera (monga kuphatikiza mayankho kapena ma frequency chain) kumafunika.
4. Kukhazikika kwakukulu
Kutengera kapangidwe ka ma digito, imakhala ndi kulondola kwakukulu kwa ma frequency otulutsa, sikhudzidwa kwambiri ndi zinthu zachilengedwe monga kutentha ndi magetsi, ndipo imadalira kukhazikika kwa chizindikiro cholowera.
5. Kugwiritsa ntchito mphamvu zochepa komanso kuphatikiza
Ukadaulo wamakono wa CMOS umagwiritsa ntchito mphamvu zochepa, ndi wosavuta kuuphatikiza mu FPGA, ASIC kapena microcontroller, ndipo umagwiritsa ntchito zinthu zochepa.

Ntchito:
1. Njira yolumikizirana
Kupanga pafupipafupi: Mu gawo lotsekedwa (PLL), pafupipafupi yomwe ikufunidwa imapangidwa limodzi ndi oscillator yolamulidwa ndi voltage (VCO); Kugawa pafupipafupi kwa oscillator (LO) mu RF applications kumapanga ma frequency a multi-channel.
2. Kukonza zizindikiro za digito
Kuchepetsa zitsanzo: Kuchepetsa kuchuluka kwa zitsanzo kuti muchepetse kuchuluka kwa deta, komwe kumagwiritsidwa ntchito limodzi ndi kusefa kotsutsana ndi aliasing.
3. Zipangizo zowerengera nthawi ndi nthawi
Mu mawotchi a digito ndi ma timer amagetsi, oscillator ya kristalo (monga 32.768kHz) imagawidwa kukhala 1Hz kuti iyendetse dzanja lachiwiri.
Kuchedwa kuyambitsa kapena kukonza nthawi ndi nthawi ntchito mu kayendetsedwe ka mafakitale.
4. Zida zoyesera ndi zoyezera
Jenereta ya chizindikiro imapanga zizindikiro zoyesera pafupipafupi kapena imagwira ntchito ngati gawo logawaniza pafupipafupi la mita ya pafupipafupi.