CD4007 is an interesting chip to experiment with.


Moderators note : added the datasheets

 

Andrewmm, that is exactly spot on. The PDF AND9983 figure 2 which is supported by an equation. Uses a 3 gate configuration as shown. It gives a stable frequency and almost perfect 50% that beats what I have which is unstable below 30 Hertz and what AG showed short hystorisis.

 

CD4007 is an interesting chip to experiment with.
View attachment 206735

Moderators note : added the datasheets

More than 30 years believing it was obsolete!!

 

More than 30 years believing it was obsolete!!

I had always thought about getting some to experiment with, but never got around to it until a couple years ago. A student was on AAC and needed to construct a D flip flop. I decided to buy a hundred of them to have some on hand. The first circuit I breadboarded was a Schmitt inverter. It's a lot easier than with BJTs.

Wish I had bought them sooner because CD4xxx prices keep going up. Not as bad as TTL yet, but I'm sure it'll get there eventually.

 

Any good spice model for the CD4007 ?

 

The CD4007 is useful because a complimentary pair is better for getting a signal through noise.
There are a few models out there: RIT and MbreakN and MbreakP. The language related to data sheets leaves the model builder with uncertainty which is in everything anyway. here is a guide.
http://www.simonbramble.co.uk/lt_spice/ltspice_lt_spice_tutorial_6.htm
CalPoly Pamona
https://www.cpp.edu/~bolson/web_pages/how_to_spice.htm

 

I had always considered the CD4007 as something the RCA marketers thought they needed in case the initial product offerings was missing a critical function. "It its not in the catalog, just use a few of these..."

 

The CD4007 is useful because a complimentary pair is better for getting a signal through noise.
There are a few models out there: RIT and MbreakN and MbreakP. The language related to data sheets leaves the model builder with uncertainty which is in everything anyway. here is a guide.
http://www.simonbramble.co.uk/lt_spice/ltspice_lt_spice_tutorial_6.htm
CalPoly Pamona
https://www.cpp.edu/~bolson/web_pages/how_to_spice.htm

Hi,

The model they give for the NMOS doesnt work too well.

 

One interesting function of the CD4007 is that it can provide an open-drain pull-up or pull-down function if needed.
And I believe you can operate the N-MOSFET open-drain pull-up at up to 15V even if the chip is being powered by 5V so it could be used as a low to high level logic translator.

 

The circuits that have endured time and are popular here are built very well with mostly through hole. There was a trend using 4049 for sound effects. At the same time the Gilbert cell replications had some very nice current mirror, long tail variations. There were attempts to use surplus parts.
And it makes sense cost effective to use. Today $2.00 each eBay or $0.039 in quantities of 1000. I don't see the large lots so the inventory supply demand suggest having a really nice circuit for example current mirror that we re-think the objective. Can it be done on an academic budget ? The hands on lab work will need to reinforce what the virtual electronics museum featured as well as which text book was chosen. Because of the wide variety and low budget nice is better. About current mode better explanation

 

Some sadness:

 

Thanks, May he RIP. God Bless his prodigy.
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On the subject of CMOS using the gates of CD4007 my notes on an old simulation uses the part MCH6613
A good stereo microscope with zoom and solid adjustable boom stand is less blurry.
However small parts can be more useful when you have access to all the ports. Spice models of this variety would likely be helpful to someone making application having some understanding of the principals. It is from there that I see that choice of CMOS (in this case)might be the effect that the engineer is going for. The esd is only a practical consideration for how it will fair under certain situations, the parts now are less prone to esd.
The guy at radio shack said once you open it you cannot return it.
https://www.onsemi.com/pub/Collateral/MCH6613-D.PDF