Understanding the Effect of a Capacitor Across Transistor Base & Collector

  • Thread starter Thread starter unplebeian
  • Start date Start date
  • Tags Tags
    Transistor
Click For Summary

Discussion Overview

The discussion centers on the effects of placing a capacitor across the base and collector of a transistor, specifically regarding its impact on the transistor's speed and operation. The conversation includes aspects of feedback mechanisms and references to specific concepts in analog electronics.

Discussion Character

  • Homework-related, Technical explanation, Conceptual clarification

Main Points Raised

  • One participant inquires about the role of a capacitor (1uF) across the base and collector of a transistor and suggests it may slow down the transistor's operation.
  • Another participant proposes that the capacitor provides feedback of high frequencies from the collector to the base, implying a relationship between the capacitor and the transistor's frequency response.
  • A request for elaboration and references is made, specifically mentioning a text by Gaussi on Analog devices and inquiring about the section related to Miller capacitance.
  • A later reply acknowledges the request and explains that Miller capacitance is a method for analyzing the feedback effect introduced by the capacitor.

Areas of Agreement / Disagreement

The discussion does not reach a consensus, as participants express varying levels of understanding and seek clarification on the concepts involved, particularly regarding Miller capacitance and its implications.

Contextual Notes

Some assumptions about the participants' prior knowledge of feedback mechanisms and specific texts are present, but these are not fully articulated. The discussion also reflects a dependence on the definitions of terms like Miller capacitance, which may not be universally understood.

unplebeian
Messages
157
Reaction score
1

Homework Statement



What does a capacitor across the base and collector of the transistor do? Apparantly adding a cap (1uF) will slow it down. Can anyone explain how?

Homework Equations





The Attempt at a Solution

 
Physics news on Phys.org
Have you already studied feedback? The capacitor provides a feedback of high frequencies from the collector to the base.
 
Can you please elaborate or provide me with a reference. I have a text by Gaussi on Analog devices. What section does this come in (miller capacitance??)
 
unplebeian said:
Can you please elaborate or provide me with a reference. I have a text by Gaussi on Analog devices. What section does this come in (miller capacitance??)

I don't know your textbook. Miller capacitance is a way of analyzing the effect of the feedback provided by your capacitor.
 

Similar threads

  • · Replies 17 ·
Replies
17
Views
3K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 6 ·
Replies
6
Views
3K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 1 ·
Replies
1
Views
3K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 4 ·
Replies
4
Views
3K
  • · Replies 11 ·
Replies
11
Views
2K
  • · Replies 6 ·
Replies
6
Views
1K