How does this have 24 transistors?

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Discussion Overview

The discussion revolves around the number of transistors in a specific circuit as taught by a professor. Participants are trying to reconcile their calculations with the professor's stated total of 24 transistors, exploring the components and configurations that contribute to this count.

Discussion Character

  • Debate/contested

Main Points Raised

  • One participant calculates a total of 22 transistors based on their breakdown of the circuit components, specifically noting that T1 to T4 requires 8 transistors and 7 inverters require 14 transistors.
  • Another participant suggests that the discrepancy might be due to the need for a complementary output (Q'), which would require an additional 2 transistors, although this is not explicitly mentioned in the circuit.
  • Some participants discuss the possibility of reaching out to the professor for clarification, expressing concerns about missing the class and the implications of their absence.
  • A later reply mentions that having a complementary output is typically necessary, but loading that output could affect internal performance, suggesting that an additional inverter might be needed to manage this.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the number of transistors, with some agreeing that the additional transistors for a complementary output could explain the professor's count, while others remain uncertain about the circuit's configuration.

Contextual Notes

There are unresolved assumptions regarding the circuit's design and the necessity of complementary outputs, as well as the implications of missing class on understanding the material.

jaus tail
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Master slave based edge triggered register
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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.
 
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Why don't you ask her, showing your calculations?
 
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Borek said:
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.
 
You can always try an email :smile:
 
Borek said:
You can always try an email :smile:
Then she'll ask me why I missed her class, and I was at the gym at that time.
 
jaus tail said:
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.
 
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jaus tail said:
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? :wink:
 
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