Mene ne banbanci tsakanin Static Ram da kuma Dynamic Ram?

Kwamfutarka tana amfani da dukkanin wadannan RAM din guda biyu a kuma lokaci guda, amma kuma tana amfani da su ne domin dalilai mabanbanta kasancewar yanayin tsada. Idan mutum ya fahimci banbancin da ke tsakanin SRAM da kuma DRAM shi da kansa zai gane dalilin da ya sa aka kira wannan da Static wancan kuma aka kira shi da Dynamic da kuma dalilin tsadar Static RAM.

Dynamic RAM kamar yadda muka yi bayani a baya cewar kusan shine mazubin na memory da aka amfani da shi a wannan lokaci.

Amma kuma idan ba mun warware zare da abawa akan yadda aka kirkiresu ba ne ba zamu fahimci darasin sosai ba. A cikin DRAM akwai abin da muke kira da Chips wadanda su ne suke yin aiki a cikinsa. Kowane daya daga cikin wannan Chips din yana rike bit daya ne na data wanda ya hada abubuwa guda biyu transistor da kuma capacitor kamar yadda muka fara bayani a baya. Babu shakka wadannan Chips wanda muka ce resistor ne da capacitor kanana ne matuƙa ta yadda za a iya samun chips masu dinbin yawa wanda za a same su a cikin Ram guda daya. Shi wannan capacitor shi ke rike dukkanin bayanai da suka shiga cikin ram ta hanyar 0 da 1 kamar yadda bayani zai zo akan yadda kwamfuta take ganin abu a cikinta. Shi kuwa transistor yana matsayin makunna ne da yake lura da kuma sarrafi shi wancan capasitor ta hanyar sake rubuta ko kuma goge abin da ke cikinsa.

Shi capasitor kamar wani karamin bokiti ne da yake iya ajiyar electrons. Idan aka ce an sami 1 a cikin memory to wannan bokitin ya kika da electrons din fal. Idan kuma aka zuba masa 0 to ya zama babu komai a cikinsa. To matsalar bokitin capasitor fasasshe ne ko kuma muce ya huje saboda haka a sakamakon wannan hujewar da wannan bokitin yayi sai ya kasance kafin dakika guda (milliseconds) duk abin da ke cikin wannan bokitin ya zube. A sakamakon haka, dole ya zama wajibi ga CPU ko kuma Memory Controller su shigo ciki domin barin wannan bokitai su zama babu komai matsala ne dole a nemo wani abu da zai rika kwarfe electrons din nan yana sake mayar da su cikin wannan bokitin. Saboda haka, shi memory controller abin da ya ke yi duk data da ta shiga cikin memory ko capasitor sai ya kwafe ta yadda da zarar ta zube sai ya mayar da ita. Wannan zubewa da kuma kwarfewa da mayar da shi cikin capasitor yasa ake kiran wannan Ram da suna Dynamic kuma wannan zubewar da kwafewar da kuma mayarwar tana faruwa sama da dubunnai kafin dakika guda. Saboda haka idan ba wai hakan tana faruwa ba to duk abin da DRAM ya samu zai manta, amma kuma kasancewar wannan abu da ake saka mishi yana zubewa ana kuma sake kwarfoshi a mayar ya sanya cewar dole ya kasance bashi da saurin aiki.

Shi kuwa Static RAM yana amfani da fasaha ta daban. Shi SRAM an yi mishi zubi da tsari na Flip-Flop wanda ya ke rike kowane bit daya. Shi Flip-Flop na memory ana samun transistors guda 4 zuwa 6 tare da wasu wayoyi, amma kuma shi bokitisa ba bulalle bane, saboda haka kenan ba koda wane lokaci yake bukatar ya warware kansa ba. Wannan shine dalilin da yasa SRAM yafi DRAM sauri, kasancewar shi SRAM yana iya bayar da sarari mai yawa wanda Dynamic RAM. Wannan kuma shine dalilin da ya sa Static RAM yake da tsada.

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