analog signal

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analog signal nalog signal is any continuous-time signal representing some other quantity, i.e., analogous to another quantity. for example, in an analog audio signal, the instantaneous signal voltage varies continuously with the pressure of the sound waves.[1] in contrast, a digital signal represents the original time-varying quantity as a sampled sequence of quantized values. digital sampling imposes some bandwidth and dynamic range constraints on the representation and adds quantization error.[2] the term analog signal usually refers to electrical signals; however, mechanical, pneumatic, hydraulic and other systems may also convey or be considered analog signals. representation[edit] an analog signal uses some property of the medium to convey the signal's information. for example, an aneroid barometer uses rotary position as the signal to convey pressure information. in an electrical signal, the voltage, current, or frequency of the signal may be varied to represent the information. any information may be conveyed by an …

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r, until in extreme cases, the signal can be overwhelmed. noise can show up as hiss and intermodulation distortion in audio signals, or snow in video signals. generation loss is irreversible as there is no reliable method to distinguish the noise from the signal. in contrast, although converting an analog signal to digital form[3] introduces a low-level quantization noise into the signal due to finite resolution of digital systems, once in digital form, the signal can be transmitted, stored, or processed without introducing significant additional noise or distortion. noise accumulation in analog systems can be minimized by electromagnetic shielding, balanced lines, low-noise amplifiers and high-quality electrical components.[4] in analog systems, it is difficult to detect when such degradation occurs. however, in digital systems, degradation can not only be detected but corrected as integral mikrosxema (ims) – bu o`zaro bog`langan bir necha tranzistorlar, diodlar, kondensatorlar. rezistorlar yig`indisi hisoblanadi va u yagona …

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ar asosida rezistor va kondensator hosil qilish mumkin. yarimo`tkazgichli ims larni hususiyati shundan iboratki ularni elementlari orasida induktivlik g`altagi yo`q, chunki shu paytgacha qattiq jismlarda elektromagnit induksiyasiga ekvivalent bo`lgan fizik hodisa olish imkoniyati bo`lmagan. katta integral mikrosxema – deb ko`p sonli bir turli yacheykalardan tashkil topgan ko`p o`lchamli yarimo`tkazgichli qurilmaga aytiladi. u murakkab funksiaonal sxemaga birlashgan bo`ladi. hozirgi kunda ishlab chiqarayotgan katta integral mikrosxemalar (kims) 10 ming va undan ortiq mantiq elementlaridan tashkil topadi. barcha kims lar uch sinfga bo`linadi. 1) hisoblagichlar, rezistorlar, jamlagichlar, arifmetik-mantiq qurilmalari tipidagi funksional bloklar: 2) xotiras qurilmalari (xq): 3) mikroprosessorlar (mp). dastlabki kims lar mdp (metall dielektrik poluprovodnik lar) struktura asosida qurilgan. hozirgi kunda kims element bazasiga bipolyar strukturalar ham kiradi. elektron va yarimo`tkazgichli qurilmalarni loyihalashni umumiy holatlari. to`g`ri elektron va yarimo`tkazgichli qurilmalarni strukturaviy va prinspial elektr sxemalari ularni ishlash prinsplarini taxlil qilishga o`rgatadi. ammo bu elektr sxemalar elektrik va yarimo`tkazgichli qurilmalarni konstruksiyasini belgilay olmaydi, …

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ko`pchilik qismi bosma platalarga joylashtirilgan. bunday platalar dielektrik asos hisoblanib teshiklari mavjud va chizmalar ko`rsatilgan. 0,3-1,5 mm diametrda hosil qilingan teshiklar osma elementlar (integral sxemalar, tranzistorlar, rezistorlar, kondensatorlar)ni joylashtirish, bosma platani mahkamlash hamda teskari tomonda joylashtirilgan elementlarni ulash uchun ishlatiladi. teshik devorlari metallashtiriladi. osma elementlarni uchlari teshiklarda qalaylanadi, chunki ularga bosim simlar kelgan. shunday qilib bosma uzel (tugun) hosil qilinadi. bosma platalarni yuzasini qisqartirish uchun ko`pqatlamli platalar (kqp) qo`llaniladi, ular almshinuvchi dielektrik qatlamlardan tuzilgan bo`ladi. kqp qatlamlarda bosma simlarni taqsimlanishi bosma platalarni o`lchamlarini keskin qisqartirishga olib keladi, bu narsa ko`p chiqishlarga ega bo`lgan mikrosxemalardan foydalaniladi. elektron va yarimo`tkazgichli qurilmalar (eyak) ni loyihalash va ishlatishda agregatlashtirishni qo`llash katta foyda beradi. agregatlashtirish-o`zaro almashtiriladigan uzel va bloklardan tuzilgan apparatlarni konpanovkalash usulidir. agregatlashgan komplekslarni tuzishda unga kirgan barcha uzel va bloklarni to`la elektrik va konstruktiv almashinishi ko`zda tutiladi. asosiy tipoviy bloklar va subbloklar unifikasiyalashtirilgan, bu holat yangi apparaturalarni ishlab chiqish va ishlab chiqarishga tadbiq …

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`tkazgichli qurilmalarni konstruktiv bajarilishi juda hilma hil va ularni vajifalari ishlatilish sohasi bilan aniqlanadi. maslan stasionar sharoitlarda ishlash uchun mo`ljallangan elektron apparaturani samoliot bortiga yoki kosmik kemada ishlatiladihan apparaturadan farqi katta. hulosa qilib shuni aytish mumkinki: hozirgi kunda elektron, yarimo`tkazgichli hamda elektromagnitlar asosida turli qurilmalar, avtomatlashtirilgan sanoat robotlari va manipulyatorlar tuzilmoqda. ular yordamida tehnologik jarayonlarni boshqarish, nazorat va axborot sistemalari takomillashmoqda. analog raqamli o’zgartirgich (a / d converter) aro’ (atsp) kirishdagi kuchlanishni raqamli ko’rinishda olish uchun ishlatiladi. bu natija aro’ larning ma’lumotlar registrida saqlanadi. mp ning qaysi chiqishlari aro’ ga kirishi mos holda yozilgan registrdagi qiymatlarga qarab aniqlanadi. ketma-ket universal (uart yoki usart) interfeys informatsion kanalni tashki etuvchi universal asinxron yoki universal sinxron ma’lumotlarni qabul qilib uzatuvchi (universal synchronous/asynchronous receiver and transmitter – uart tili usart), mk rini tashqi olam bilan bog’lovchi qulay va sodda interfeys.bir paytning o’zida ham ma’lumot uzatib, ham qabul qilib ishlash xususiyatiga ega.u ,, rs – …

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analog signal nalog signal is any continuous-time signal representing some other quantity, i.e., analogous to another quantity. for example, in an analog audio signal, the instantaneous signal voltage varies continuously with the pressure of the sound waves.[1] in contrast, a digital signal represents the original time-varying quantity as a sampled sequence of quantized values. digital sampling imposes some bandwidth and dynamic range constraints on the representation and adds quantization error.[2] the term analog signal usually refers to electrical signals; however, mechanical, pneumatic, hydraulic and other systems may also convey or be considered analog signals. representation[edit] an analog signal uses some property of the medium to convey the signal's information. for example, an an...

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