상황
You need a simple clock source or square wave generator using only standard gates. This oscillator uses three NAND gates in a loop with an enable control.
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01
Three NAND stages for an odd number of inversions
02
Enable input tied to first NAND to control oscillation
03
Using NAND as inverter by tying both inputs together
Use when you need a quick, compact oscillator from available logic gates, e.g., in FPGA or discrete logic prototyping.