Here is the image:

Triangle with bubble on the hypotenuse side.

What does the triangle with a bubble on one of its sides represent?

  • \$\begingroup\$ In general, "bubble" means a negative logic input (or inversion of output). \$\endgroup\$
    – Eugene Sh.
    Jan 11, 2022 at 15:12
  • 3
    \$\begingroup\$ It's a bit of a weird circuit, since normally the behavior of a D latch is undefined for a Z input. Where does this come from? \$\endgroup\$
    – John Doty
    Jan 12, 2022 at 1:35

1 Answer 1


Try this for size: -

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Image from here. Here's a truth table and picture: -

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Image from here.


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