Combinational Logic Circuit vs Sequential Logic Circuit
Digital Circuits yog cov khoom siv hluav taws xob uas siv hluav taws xob sib cais rau nws txoj haujlwm, thiab Boolean logic rau kev txhais lej ntawm cov haujlwm no. Cov kab hluav taws xob digital siv cov ntsiab lus paub daws teeb meem hu ua rooj vag, thiab txhua lub rooj vag yog ib qho khoom siv uas nws cov zis yog qhov ua haujlwm ntawm cov khoom siv ib leeg. Digital circuits yog siv los kov yeej lub teeb liab attenuation, suab nrov distortion tam sim no hauv Analog circuits. Raws li kev sib raug zoo ntawm cov khoom siv thiab cov khoom tawm, Cov circuits Digital tau muab faib ua ob pawg; Combinational Logic Circuits thiab Sequential Logic Circuits.
Ntau ntxiv txog Kev Sib Txuas Lus Logic Circuits
Digital circuits uas nws cov zis yog qhov ua haujlwm ntawm cov khoom siv tam sim no hu ua Combinational Logic circuits. Yog li ntawd, kev sib xyaw ua ke logic circuits tsis muaj peev xwm khaws cia ib lub xeev hauv lawv. Hauv cov khoos phis tawj, kev ua lej lej ntawm cov ntaub ntawv khaws cia yog ua los ntawm kev sib xyaw logic circuits. Ib nrab adders, tag nrho adders, multiplexers (MUX), demultiplexers (DeMUX), encoders, thiab decoders yog theem pib ntawm kev siv cov logic circuits. Feem ntau cov Cheebtsam ntawm Arithmetic thiab Logic Unit (ALU) kuj muaj xws li cov logic circuits.
Kev sib txuas lus sib txuas lus feem ntau yog siv los ntawm cov khoom lag luam (SOP) thiab cov khoom ntawm cov txiaj ntsig (POS). Independent ua hauj lwm xeev ntawm lub Circuit Court yog sawv cev nrog Boolean algebra. Tom qab ntawd ua kom yooj yim thiab siv nrog NOR, NAND thiab NOT Gates.
Ntau txog Sequential Logic Circuits
Digital circuits uas nws cov zis yog qhov ua haujlwm ntawm ob qho khoom siv tam sim no thiab cov khoom siv yav dhau los (hauv lwm lo lus, lub xeev tam sim no ntawm Circuit Court) hu ua sequential logic circuits. Sequential circuits muaj peev xwm khaws tau lub xeev yav dhau los ntawm qhov system raws li cov khoom siv tam sim no thiab lub xeev dhau los; Yog li ntawd, qhov sib txuas logic Circuit Court tau hais tias muaj lub cim xeeb thiab siv los khaws cov ntaub ntawv hauv digital circuit. Cov ntsiab lus yooj yim tshaj plaws nyob rau hauv kev sib txuas lus yog lub npe hu ua latch, qhov twg nws tuaj yeem khaws lub xeev dhau los (latches lub cim xeeb / xeev). Cov latches tseem hu ua flip-flops (f-f's) thiab, nyob rau hauv daim ntawv muaj tseeb, nws yog ib qho kev sib txuas ua ke nrog ib lossis ntau qhov tso tawm rov qab los ua cov khoom siv. JK, SR (Set-Reset), T (Toggle), thiab D yog feem ntau siv flip flops.
Cov logic txuas txuas ntxiv yog siv nyob rau hauv yuav luag txhua hom kev nco thiab lub xeev cov tshuab tsis kawg. Finite State Machine yog tus qauv digital circuit uas muaj peev xwm hais tau yog tias lub kaw lus tsis raug. Yuav luag tag nrho cov kab ke sib txuas ua ke siv lub moos, thiab nws ua rau kev ua haujlwm ntawm lub flip flops. Thaum tag nrho cov flip-flops nyob rau hauv lub logic Circuit Court yog triggered ib txhij, lub Circuit Court hu ua ib tug synchronous sequential circuits, thaum lub circuits uas tsis tau triggered ib txhij hu ua asynchronous circuits.
Hauv kev xyaum, feem ntau ntawm cov khoom siv digital yog raws li kev sib xyaw ua ke ntawm kev sib xyaw ua ke thiab sib txuas lus sib txuas.
Dab tsi yog qhov txawv ntawm Combinational thiab Sequential Logic Circuits?
• Sequential logic circuits muaj nws cov zis raws li cov inputs thiab lub xeev tam sim no ntawm lub system, thaum sib txuas logic Circuit Court cov zis yog raws li nyob rau hauv tam sim no inputs.
• Sequential Logic Circuits muaj lub cim xeeb, thaum sib txuas logic circuits tsis muaj peev xwm khaws cov ntaub ntawv (xeev)
• Combinational Logic Circuits yog siv feem ntau rau kev suav lej thiab kev ua haujlwm Boolean, thaum cov logic txuas txuas ntxiv yog siv los khaws cov ntaub ntawv.
• Kev sib txuas logic circuits yog tsim nrog logic rooj vag raws li cov khoom siv theem pib thaum, feem ntau, cov logic circuits muaj (f-f's) raws li lub tsev kawm theem qis.
• Feem ntau cov kab sib txuas ua ke yog clocked (ua rau kev ua haujlwm nrog hluav taws xob pulses), thaum kev sib txuas lus tsis muaj moos.
