Mene ne analog sigina

Kowannen mu yana fuskantar kullum da na'urorin lantarki - shi ne wani hali wayar hannu, a kwamfuta na aikin da dama, TV, radio, da dai sauransu Goma da suka wuce, babu daya tunani sosai, dijital ko analog siginar da aka yi amfani da wani musamman na'urar .. Amma shi ya dauki wani lokaci kadan, kuma da kalmar "dijital" godiya ga nagartaccen talla yakin fara, da yawa hade da kalmomi "mai kyau, high quality-, abin dogara". Ya kamata a gane cewa wani adadin na gaskiya a cikin wannan. A analog siginar da aka fara za a yi amfani da watsa bayanai a baya fiye da dijital. Wannan shi ne saboda ta sauki handling, unavailability na kayayyakin more rayuwa da kuma wasu sauran dalilai.

Don gane da abin da yake wani analog sigina, shi wajibi ne don tunawa da kwasfansu na lantarki injiniya, musamman, da yanayi na lantarki. Bayan da alama a tambaya ne, a gaskiya, an kai tsaye hade da shi - yana iya zama wani kai tsaye canja wurin da iko, da kuma ta hanyar electromagnetic filayen. Lalle ne, haƙĩƙa, da "sananne" sinusoid ji kome.

Kuma wajen tunani zana a kwance line - wannan ne lokacin da axis. An strung kamar m wavy line, da kuma tsawo na taguwar ruwa da suke sama da kuma a kasa da axis ne. Next, tunanin cewa mu ne wavy line stretch tare da lokaci axis. A sakamakon haka, rage yawan taguwar ruwa ta wani lokaci. Kuma yanzu "damfara" ba tare da - taguwar ruwa fara tafiya more sau da yawa. A wasu kalmomin, wadannan ayyuka da muka canza mita. Idan muka ci gaba da tunani gwaji da kuma "ji ƙyama / mikewa" na kalaman sama da kasa a kan lokaci axis, shi haka zai yiwu a canza mawadãta. Wannan shi ne yadda wani analog siginar da aka generated.

A radios aka yi amfani, wadannan hanyoyi guda biyu - da FM (Frequency da da daidaitowa) da kuma AM (amplitude daidaitowa). Hakika, da sama misali ne Sauki ga fahimtar. Bugu da kari ya canza mita da kuma (ko) mawadãta kalaman da hõre sauran, mafi takamaiman canje-canje. More kan wannan za a iya samu a kan musamman shafukan ko a adabi.

Bisa ta gabatar ba, yana yiwuwa ya kirkiro da definition: da analog sigina ne m, a lokacin modulated hanyar aika bayanai. Daya daga disadvantages ne laulayi "amo gurbatawa". Yanzu wayoyin hannu ne a duk. Kuma kowa da kowa, a kalla sau daya, barin waya aiki a kusa da TV ko kwamfuta jawabai. Wadanda m umurni da akafi gudamawar da jawabai kafin samun wani kira ko SMS liyafar, an san duk. Su wakilci electromagnetic tsangwama, wedged a sake bugawa sauti na TV ko kwamfutar. Babu shakka, wannan shi ne a ke so.

Leveling auku a cikin conductors ginshikan. A gaskiya, da daukar kwayar cutar modulated kalaman (analog sigina) ne hõre waje tasiri, shi ya tarwatsa. Hakika, a cikin wannan yanayin, mutum saukin gano amfani data (sauti) daga amo, amma idan siginar da aka samu ta hanyar dabaru haihuwarka, akwai wani yawan matsaloli. Alal misali, ba shi yiwuwa a dogara da sanin inda amfani bayanai, da kuma inda amo.

Saboda haka, analog yanayin na watsa an maye gurbinsu da dijital. Analog da sigina na dijital ta sha bamban. Na biyu ne generated kamar haka: ba tare da conventionally ne zuwa kashi a jam'i na pixels, da matsayin kowanne daga wanda aka sauya ta mai takamaiman jerin hatsaisai da kuma sarari (babu halin yanzu). Yawancin lokaci bugun jini yayi dace da mai ma'ana daya, da kuma wani rata - sifili (ko da yake zai iya zama kishiyar hanyar). The samun na'urar decodes da samu hatsaisai kuma ya mayar da asali ba tare da kalaman. Babu shakka, irin wannan alama ne kasa batun amo, tun da dikodi mai naúrar a fili bambanta hatsaisai. Duk da haka, idan ya wuce kima amo gurbatawa a cikin digital siginar da aka kawai rasa.