Q. |
he problem of the VOH(min) of a TTL IC being too low to drive a CMOS circuit and meet the CMOS requirement of VIH(min) is usually easily overcome by: |
A. | adding a fixed voltage- divider bias resistive network at the output of the ttl device |
B. | avoiding this condition and only using ttl to drive ttl |
C. | adding an external pull- down resistor to ground |
D. | adding an external pull-up resistor to vcc |
Answer» D. adding an external pull-up resistor to vcc |
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