Nkhani

Dziwani Zambiri Zokhudza Band Stop Fyuluta

TheFyuluta Yoyimitsa Band, (BSF) ndi mtundu wina wa dera losankha ma frequency lomwe limagwira ntchito mosiyana kwambiri ndi Band Pass Filter yomwe tidayang'ana kale. Band stop filter, yomwe imadziwikanso kuti band reject filter, imadutsa ma frequency onse kupatula omwe ali mkati mwa stop band inayake yomwe yachepa kwambiri.

Ngati bande iyi yoyimitsa ndi yopapatiza kwambiri komanso yocheperako kuposa ma hertz ochepa, ndiye kuti fyuluta yoyimitsa bande nthawi zambiri imatchedwa fyuluta yoyimitsa, chifukwa ma frequency response ake amasonyeza kuti ndi bande yozama yokhala ndi kusankha kwakukulu (kupindika mbali) osati bande yotakata.

Komanso, monga fyuluta yodutsa band, fyuluta yoyimitsa band (band reject kapena notch) ndi fyuluta yachiwiri (ya pole ziwiri) yokhala ndi ma frequency awiri odulidwa, omwe amadziwika kuti -3dB kapena half-power points omwe amapanga bandwidth yayikulu ya band stop pakati pa ma point awiriwa a -3dB.

Kenako ntchito ya fyuluta yoyimitsa band ndi yodutsa ma frequency onse kuyambira pa zero (DC) mpaka pa frequency yake yoyamba (yotsika) ƒL, ndikudutsa ma frequency onsewo pamwamba pa frequency yake yachiwiri (yapamwamba) ƒH, koma kuletsa kapena kukana ma frequency onsewo omwe ali pakati. Kenako bandwidth ya ma filters, BW imatanthauzidwa kuti: (ƒH – ƒL).

Chifukwa chake pa fyuluta yoyimitsa band yotakata, fyuluta yoyimitsa band yeniyeni imakhala pakati pa mfundo zake zotsika ndi zapamwamba -3dB pamene ikuchepa, kapena kukana ma frequency aliwonse pakati pa ma frequency awiriwa. Chifukwa chake, curve yoyankhira ma frequency ya fyuluta yoyimitsa band yoyenera imaperekedwa.

Chabwino kwambirifyuluta yoyimitsa guluingakhale ndi kuchepa kosatha mu gulu lake loyimitsa ndipo palibe kuchepa kulikonse mu gulu lililonse loyimitsa. Kusintha pakati pa magulu awiri oyimitsa ndi gulu loyimitsa kungakhale koyima (khoma la njerwa). Pali njira zingapo zomwe tingapangire "Fyuluta Yoyimitsa Band", ndipo zonse zimakwaniritsa cholinga chimodzi.