What types of flip flops
Overview of flip-flop types
1. Non-clocked flip-flops (asynchronous FF)
A simple basic flip-flop has two inputs S and R and two outputs Q and . The input assignment has a direct effect on the state of the flip-flop (see NAND-FF or NOR-FF)
2. Clock-controlled flip-flops (synchronous FF)
Clock-dependent flip-flops also have a corresponding one Clock input. The inputs S and R only work in conjunction with the clock input (T or C. - from engl. clock). A distinction is made between two main groups, the clock state controlled and the edge-controlled Flip flops.
2.1. clock state controlled flip-flops
These flip-flops process an incoming input signal throughout Duration of the active level (e.g. C = 1).
Two-state controlled flip-flop:
2.2. edge-controlled flip-flops
These flip-flops process an incoming input signal only to a specific one time, namely when the clock signal C changes its level (clock edge). A change in the clock signal from "0" to "1" is called a rising clock edge, a change in the clock signal from "1" to "0" is called a falling clock edge.
Single-edge controlled flip-flop:
Two-edge controlled flip-flop:
1. Get a flip-flop block out of the closet and check that it is one state controlled flip-flop. Create a truth table.
2. Use the website http://kauai.theoinf.tu-ilmenau.de/~sane/projekte/flipflop/flipflop.html and try to understand the English terms. Select the following flip-flop in the applet window:
Check how this specified FF circuit behaves. To do this, you can switch inputs h01, h10 and C using the corresponding buttons. A signal-time diagram is generated next to the buttons. Explain what you can read on this diagram.
Try to understand the circuit made up of 4 NAND gates. You can use the functionality of the NAND-FF as you have already learned.
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