Consider the circuit shown. Using a C-MOS4069 you invert the inputs R and S ...
Circuit diagram RS latch with NAND gates and inverted inputs. |
Circuit RS latch with NAND gates and inverted inputs. (Enlarge) |
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You realize easily that now you got back the truth table of a RS latch... Note: Also the inputs R and S are interchanged. However, this has no practical consequences |
Truth table RS latch with NAND gates and inverted inputs. |
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RS Latch A RS latch with NAND gates has a negative logic. The inputs are inverted in relation to the RS latch with NOR gates. |
In the next experiments you build a DE latch with NAND gates...
