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Digital Electronics - Integrated-Circuit Logic Families - Discussion

Discussion Forum : Integrated-Circuit Logic Families - General Questions (Q.No. 14)
Integrated-Circuit Logic Families
14.

What type of circuit is represented in the given figure, and which statement best describes its operation?

It is a tristate inverter. When the ENABLE input is HIGH, the output is effectively an open circuit—it is neither LOW nor HIGH.
It is a programmable inverter. It can be programmed to function as either an active LOW or an active HIGH inverter.
It is an active LOW buffer, which can be turned on and off by the ENABLE input.
None of the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
2 comments Page 1 of 1.
Ram said:   1 decade ago
The output mainly depends on the enable pin but from this figure we can't say anything because inverter also can be of this type.
Millize said:   4 years ago
Yes, A is the correct answer because in a tristate buffer there would only be a HIGH or LOW output is it is enabled.

Since, in this circuit the input of Enable is inverted when the value is HIGH it would be inverted to LOW hence output would not be enabled and output would be HIGH IMPEDANCE or an OPEN CIRCUIT.
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