How to Design a Circuit with Diodes and Resistors for Specific Voltage Outputs?

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Discussion Overview

The discussion revolves around designing a circuit using diodes, resistors, and zener diodes to achieve specific voltage outputs based on varying input voltages. The requirements include maintaining an output of zero for input voltages below 3.6V and an output equal to the input voltage minus 3.6V for input voltages above 3.6V, with functionality for both positive and negative input voltages.

Discussion Character

  • Homework-related, Technical explanation

Main Points Raised

  • One participant outlines the problem requirements, emphasizing the need for the circuit to output zero for vin < 3.6V and vin - 3.6V for vin > 3.6V.
  • Another participant questions the original poster about their current progress and specific questions, indicating a reluctance to provide direct answers.
  • A participant suggests using a pn junction diode in conjunction with the input voltage to achieve the desired output behavior, drawing inspiration from half-wave rectification, but expresses uncertainty about implementing the 3.6V threshold.
  • Another participant recommends that the original poster study zener diodes further, implying their relevance to the circuit design.

Areas of Agreement / Disagreement

Participants do not appear to reach a consensus, as there are differing levels of understanding and approaches to the problem. The discussion remains unresolved regarding the specific implementation of the circuit design.

Contextual Notes

There are limitations in the discussion regarding the clarity of the approach to achieving the 3.6V threshold and the role of zener diodes, which remains unexplored in detail.

fbenit1
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It says using diodes, resistors, and zener diodes only, design a circuit whose output remains zero for vin<3.6V, but equals vin minus a drop of 3.6V for vin>3.6V. and the circuit has to work when the input voltages are below 0 as well as above 0. and help is appreciated.
 
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Ok. So what have you got so far? That's the problem you were given, but we're not going to do your homework FOR you. What specific question do you have?
 
I have just been thinking what i can do, I have thought that maybe having Vin and next to Vin connecting a pn junction diode so that any point before the turn on voltage, Vout would equal 0. (trying to get the idea from the half wave rectifier.)

but don't know how to get the 3.6 value as my point of change. I don't know if i am going in the right direction
 
From what you are writing, it sounds like you need to read some more about zeners.
 

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