How does this have 24 transistors?

[jaus tail]

TL;DR

Master slave based edge triggered register

Our professor is teaching this circuit and she mentioned there are 24 transistors. But I counted and it comes out to be 22
T1 to T4 needs 2 (transistor) * 4 = 8 transistors
Each inverter needs 2 transistors. so 7 inverters need 14 transistors.
total 22 transistors.
Unless we're also creating a Q' in the output, so that'll need 2 more transistors. But that's not mentioned in the circuit.

 

[Borek]

Why don't you ask her, showing your calculations?

 

[jaus tail]

Why don't you ask her, showing your calculations?

Because I missed her class and I saw this in her video lecture. And she is in another campus. Her lectures are conducted online.

 

[Borek]

You can always try an email

 

[jaus tail]

You can always try an email

Then she'll ask me why I missed her class, and I was at the gym at that time.

 

[NascentOxygen]

Unless we're also creating a Q' in the output, so that'll need 2 more transistors.

I think that is probably the answer. We'll always be needing complementary outputs. There is a Q’ available in the internals, but loading that point may upset internal switching/timing performance. An additional inverter will isolate the load.

 

[sophiecentaur]

Then she'll ask me why I missed her class, and I was at the gym at that time.

Would she not believe that you re-read your notes and only thought of the question later?
Or do you feel too guilty?