Thread Starter


Joined Mar 9, 2007
What possible reasons that the output of a particular inverter is stuck LOW while its input is pulsing?
What possible reasons that the inverter output is stuck at an indeterminate logic level?


Joined May 16, 2005
Hint for first question:

Back in the early 80's, ET2 Poole and I were sent out to the flight-line at Barber's Point NAS to determine why the automated weather recording station was not reporting in to the tower. Using the six-step troubleshooting method, we quickly determined the fault was due to the charred remains of a gekko that had unwisely chosen to rest atop the power input terminals.

Hint for the second question:

What is the voltage level across an unconnected TTL input?