What are these types of diode circuits?

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Discussion Overview

The discussion revolves around identifying types of diode circuits and analyzing their waveforms, specifically focusing on rectified sine waves in the context of power supply circuits. The scope includes homework-related queries and technical explanations regarding diode behavior in various configurations.

Discussion Character

  • Homework-related
  • Technical explanation
  • Exploratory

Main Points Raised

  • One participant identifies the circuits as using diode bridges and proposes that the waveforms are rectified sine waves with specific peak values.
  • Another participant suggests names for the circuits: a dual rail unregulated power supply and a single rail unregulated power supply with battery backup.
  • There are inquiries about the waveform behavior when components like the battery and diode are removed, questioning the biasing of the diode under different conditions.
  • One participant expresses uncertainty about the waveform for the second circuit and seeks clarification on the expected output without certain components.
  • Another participant confirms the correctness of the previous contributions but notes that they have not yet verified the conversion from rms to peak voltage.

Areas of Agreement / Disagreement

Participants generally agree on the identification of the circuits and the nature of the waveforms discussed, but there are unresolved questions regarding specific waveform behaviors and assumptions about the circuits.

Contextual Notes

There are limitations regarding the assumptions made about the circuits, particularly concerning the impact of removing components and the conversion from rms to peak voltage, which have not been fully explored or resolved.

Who May Find This Useful

Students and individuals interested in electronics, particularly those studying diode circuits and waveform analysis in power supply applications.

servehover
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Homework Statement


For each of the circuits, draw the waveform. The voltage drop across each diode is 0.7V
upload_2016-10-12_0-38-8.png

Homework Equations

The Attempt at a Solution


I know that both of these are using diode bridges, but is there a specific name for these circuits?
I think the waveform for Vo1 and Vo2 are rectified sine waves with peaks of 5.6 and -5.6, respectively. (at least that's what my notes say)
I have no idea where to start with #2 though.
Any hints/help would be greatly appreciated.
 
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Suitable names would be..

1) dual rail unregulated power supply
2) single rail unregulated power supply with battery backup.

servehover said:
I have no idea where to start with #2 though.

Try deleting the battery and diode temporarily. What would the Vo waveform look like then?

What happens if you apply that waveform to a circuit containing just the diode and battery. Is the diode forward or reverse biased?

What happens to Vo if you disconnect the AC mains? What happens to Vo "between the peaks" when AC is present?
 
CWatters said:
Suitable names would be..

1) dual rail unregulated power supply
2) single rail unregulated power supply with battery backup.
Try deleting the battery and diode temporarily. What would the Vo waveform look like then?

What happens if you apply that waveform to a circuit containing just the diode and battery. Is the diode forward or reverse biased?

What happens to Vo if you disconnect the AC mains? What happens to Vo "between the peaks" when AC is present?
Is my assumption with #1 correct?
Would the waveform for #2 without battery/diode simply be a full wave rectified sine wave with a peak of 13.44V?
 
Both correct so far.

I haven't checked your conversion from rms to peak voltage yet.
 
Last edited:

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