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how to define the startup state of a flipflop?

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Discussion in 'Electronic Basics' started by will, Jul 30, 2003.

Jul 30, 2003 #1

will Guest

i'm looking into a flipflop that has a well defined state during
startup. can someone please tell me how to make a flip flop that
allways starts in 0-state (or 1-state) with basical ports such as and,
nand, nor, ...
thanks in advance
Jul 30, 2003 #2

Keith R. Williams Guest

i'm looking into a flipflop that has a well defined state during
startup. can someone please tell me how to make a flip flop that
allways starts in 0-state (or 1-state) with basical ports such as and,
nand, nor, ...
Click to expand...

Reset (or set) it on power on. Depending on the power characteristics
and allowable glitches, the circuit may be a simple RC network or
something more complicated.
Jul 30, 2003 #3

eromlignod Guest

i'm looking into a flipflop that has a well defined state during
startup. can someone please tell me how to make a flip flop that
allways starts in 0-state (or 1-state) with basical ports such as and,
nand, nor, ...
thanks in advance
Click to expand...

You just need a flip-flop with a "clear" line.

Don
Jul 31, 2003 #4

will Guest

this has been a great help, but it seems like i wont be able to go
around the use of a capacitor which is where i am searching for.
thank you very much!

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