In {TAIL ~ some embodiments}, the control logic circuitry 320 has a built in logic delay circuit and generates a sense amplify enable signal according to the tracking signal on the tracking bit line DBL plus {HEAD ~ a delay} generated by the built in logic delay circuit 
In { TAIL ~ some embodiments } , the control logic circuitry 320 has a built in logic delay circuit and generates a sense amplify enable signal according to the tracking signal on the tracking bit line DBL plus { HEAD ~ a delay } generated by the built in logic delay circuit
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