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: (Solved)
1. adding a fixed voltage- divider bias resistive network at the output of the ttl device
2. avoiding this condition and only using ttl to drive ttl
3. adding an external pull- down resistor to ground
4. adding an external pull-up resistor to vcc
- d. adding an external pull-up resistor to vcc