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Digital Circuits Truth Table â�� Wikibooks

# Digital Circuits Truth Table â�� Wikibooks - Bn...

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Bản mẫu:Digital Circuits Truth Table Tủ sách mở Wikibooks AND gate Tập tin:AndGate.gif NAND (not and) gate Tập tin:Nand.gif OR gate NOR (not or) gate Tập tin:Nor.gif NOT gate (inverter) Tập tin:Not.gif XOR (exclusive or) gate XNOR (exclusive nor) gate Bản mẫu:Digital Circuits Page Mục lục 1 Flip-flops 1.1 SR Flip-flops 1.1.1 Gated SR Flip-flop 1.2 D Flip-flop 1.2.1 JK Flip-flop 1.3 Trigger Flip-Flops (T Flip-Flops) Flip-flops 11/8/2010 Bản mẫu:Digital Circuits Truth Table – … vi.wikibooks.org/…/Bản_mẫu:Digital_Cir… 1/4

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An SR flip flop made from two NOR gates. S R Q Q' 0 0 Latch Latch 1 0 1 0 0 1 0 1 1 1 0 0 Circuit symbol for an SR flip- flop. E S R Q Q' 0 0 0 Latch Latch 0 1 0 Latch Latch 0 0 1 Latch Latch A Flip-flop is an example of a bistable multivibrator, that is a device with two stable states. These states are, of course, 0 or 1 (low or high). A flip-flop is a memory device, and thus will store a value while power remains in the circuit. It is also sometime referred to as a latch, because of its ability to 'latch' onto data. There are several different types of flip-flop each with its own uses and peculiarities. The 4 main types of flip flop are : SR, JK, D, and T and each will be dicussed in more detail. SR Flip-flops An SR (Set/Reset) Flip-flop, is an asychronous device, that is, it works independently of control signals and relies only on the state of the S and R inputs. In the image we can see that an SR flip-flop can be created with two NOR gates that have a cross-feedback loop.
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