我使用OPA548T搭建如圖所示電路,在輸入高電平為5V的PWM波,但測量OPA548T輸入端即圖中R5 2PIN,其高電平電壓只有2.8V;但是仿真結果顯示并不會出現此現象,造成該現象是什麼原因呢?實在是不太理解!
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