Making a J-K flip flop from a D-Type Flip Flop - Electronic Circuits Projects Diagrams Free

Terabyte · 26th April 2007, 06:46 PM

Hey

I understand you can make a D-Type Flip Flop from a J-K flip flop by attaching J to K and inverting J...

But a past paper I have here is asking for it to be done the other way round?

"Design a circuit for the J-K flip flop using one D-Type flip flop and whatever other gates you require"

Any Help much appreciated thanks.

Leftyretro · 26th April 2007, 07:01 PM

Quote:

Originally Posted by Terabyte

Hey

I understand you can make a D-Type Flip Flop from a J-K flip flop by attaching J to K and inverting J...

But a past paper I have here is asking for it to be done the other way round?

"Design a circuit for the J-K flip flop using one D-Type flip flop and whatever other gates you require"

Any Help much appreciated thanks.

Well I can think of two ways you can approch this exercise.

1. Draw out the truth table of a JK and figure out the external input gating you would need to driving a type D FF as the output device.

2. It's probably more educational to just study the difference of these two types of FFs using their gate equivelent logic drawings from their data sheets:

page 3 of http://people.na.infn.it/~aloisio/sn7473.pdf shows a gate equivlency of a JK FF.

page 1 of http://cactus.fi.uba.ar/6617/hojas_d..._Flip_Flop.pdf shows a gate euivlency of a type D FF.

good luck

Lefty

Papabravo · 26th April 2007, 07:03 PM

A JK flip-flop can do four things. It can set, clear, toggle and hold. Sounds like a four input multiplexer with J and K as select lines, and the inputs wired to one, zero, Q-bar, and Q.

Terabyte · 26th April 2007, 08:01 PM

Quote:

Originally Posted by Papabravo

A JK flip-flop can do four things. It can set, clear, toggle and hold. Sounds like a four input multiplexer with J and K as select lines, and the inputs wired to one, zero, Q-bar, and Q.

That did it for me

Thanks

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Latest
4013 Toshiba flip flop	jbelectric777	Electronic Projects Design/Ideas/Reviews	12	26th March 2007 03:12 PM
JK flip flop question.	SeanHatch	General Electronics Chat	4	22nd December 2006 07:17 PM
resetting a D type flip flop	kasper	General Electronics Chat	5	13th April 2005 06:32 AM
JK Flip Flop Question	letsrelaythat	General Electronics Chat	18	8th October 2004 09:46 AM
Need help with voltage flip flop please.	goofy	Electronic Projects Design/Ideas/Reviews	12	13th April 2004 12:06 AM

26th April 2007, 06:46 PM	(permalink)
Terabyte	Making a J-K flip flop from a D-Type Flip Flop Hey I understand you can make a D-Type Flip Flop from a J-K flip flop by attaching J to K and inverting J... But a past paper I have here is asking for it to be done the other way round? "Design a circuit for the J-K flip flop using one D-Type flip flop and whatever other gates you require" Any Help much appreciated thanks.

26th April 2007, 07:03 PM	(permalink)
Papabravo	A JK flip-flop can do four things. It can set, clear, toggle and hold. Sounds like a four input multiplexer with J and K as select lines, and the inputs wired to one, zero, Q-bar, and Q.