How to get full duty cycle range from Hall effect / 339 PWM

D

dlatch

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#1
I built this circuit. It works great but, only yields half of the duty cycle range due to the Hall chip having a 50% quiescent output.

How can I get the full duty cycle range? (0-100%) The Hall chip is marked 1216 001H. It is a 5 volt magnet meter type chip.

thank you
 
   
   
   
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