1. Computer Science Engineering (CSE)
  2. Digital Electronics and Logic Design
  3. he problem of the VOH(min) of a TTL IC b...
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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