How NOT-Gates Turn Paradoxes Into Heat

[@iblesbosuok]

There is 4049U variant (U means Unbuffered) and there is a 4049B variant (B means Buffered). The 4049B variant actually consists of 3 NOT gates. For the 4049U variant there will be cross conduction, entering linear mode class AB to class A. Meanwhile in the 4049B variant it will be ringing, CRO trace thicken. Similar symptoms also occur in type 4069U and type 4069B. That's according to my experiment I did about 29-30 years ago.

[@johnyang799]

So it's about over 1ma of quiescent current as an amplifier. (the cmos one)

[@johnyang799]

The potential issue commenter under previous video actually was thinking about at half way biasing point both upper and lower mosfet can conduct. The current should increase exponentially with higher supply voltage or decrease very quickly when you lower the supply voltage.

[@jim9930]

@@johnyang799 Yes. You can take advantage of the exponential Rds of the FET's in HC14 Schmidt trigger invertors to make a simple voltage controlled very wideband oscillator. Wire the output to input and vary the supply voltage: 50MHz at 5v down to less than 1Hz at much lower voltages. CD40106 is the low power, high voltage cmos Schmidt Haven't tried it in 20+ years, so I don't remember the max freq. (~5MHz) HC14 is high speed cmos AC14 is about 4x faster G14 series cmos can go to 1GHz (Potato Semiconductor makes them)