TF EIMLab9 Writeup: Difference between revisions
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[[File:TF_EIM_Lab9.png | 200 px]] | [[File:TF_EIM_Lab9.png | 200 px]] | ||
Using Diode | Using Diode 1N5230B | ||
And | And | ||
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3.)Based on your observations using a oscilloscope, sketch the voltages <math>V_{in}</math> and <math>V_{out}</math> as a function of time. | 3.)Based on your observations using a oscilloscope, sketch the voltages <math>V_{in}</math> and <math>V_{out}</math> as a function of time. | ||
Outoput for several input voltages near the bias point | |||
{| border="3" cellpadding="20" cellspacing="0" | |||
| V_{in} = 0.5V || V_{in} = 0.6 V|| V_{in} = 0.75 V|| V_{in} = 0.8 V|| V_{in} = 1.0 V | |||
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|[[File:TF_EIM_Lab9_P1_0.5V.png | 100 px]] ||[[File: TF_EIM_Lab9_P1_0.6V.png | 100 px]]||[[File: TF_EIM_Lab9_P1_0.75V.png | 100 px]]||[[File: TF_EIM_Lab9_P1_0.8V.png | 100 px]]||[[File: TF_EIM_Lab9_P1_1.0V.png | 100 px]] | |||
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|} | |||
4.)Do another sketch for<math> V_0</math> = 1.0 V and another for 10.0 V (DONT LET ANY SMOKE OUT!). (20 pnts) | 4.)Do another sketch for<math> V_0</math> = 1.0 V and another for 10.0 V (DONT LET ANY SMOKE OUT!). (20 pnts) | ||
{| border="3" cellpadding="20" cellspacing="0" | |||
| V_{in} = 1 V || V_{in} = 10 V | |||
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|[[File:TF_EIM_Lab9_P1_1V.png | 200 px]] ||[[File: TF_EIM_Lab9_P1_10V.png | 200 px]] | |||
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|} | |||
= Differentiating Circuit with clipping= | = Differentiating Circuit with clipping= | ||
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<math>R_2 = 10 k \Omega</math> | <math>R_2 = 10 k \Omega</math> | ||
3.)Select a capacitor <math>(C)</math>and a pulse width <math>\tau</math> to form a differentiating circuit for the pulse from the signal generator. Hint: <math>R_{12}C \ll \tau</math>. | 3.)Select a capacitor <math>(C)</math>and a pulse width <math>\tau</math> to form a differentiating circuit for the pulse from the signal generator. Hint: <math>R_{12}C \ll \tau</math>. | ||
<math>C = 10.5 nF</math> | |||
4.)plot <math>V_{in}</math> and <math>V_{out}</math> as a function of time using your scope observations. (20 pnts) | 4.)plot <math>V_{in}</math> and <math>V_{out}</math> as a function of time using your scope observations. (20 pnts) | ||
{| border="3" cellpadding="20" cellspacing="0" | |||
| Signal setup|| RC fall time | |||
|- | |||
|[[File:TF_EIM_Lab9_P2_5V_Signal.png | 200 px]] ||[[File: TF_EIM_Lab9_P2_RCfallTime.png | 200 px]] | |||
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|} | |||
5.) Now add the diode circuit from part 1 to prevent <math>V_{out}</math> from rising above +5 V. Sketch the new circuit below. | 5.) Now add the diode circuit from part 1 to prevent <math>V_{out}</math> from rising above +5 V. Sketch the new circuit below. | ||
6.)plot <math>V_{in}</math> and <math>V_{out}</math> as a function of time with the diode circuit you added using your scope observations. (the diode should clip off positive spikes)(20 pnts) | 6.)plot <math>V_{in}</math> and <math>V_{out}</math> as a function of time with the diode circuit you added using your scope observations. (the diode should clip off positive spikes)(20 pnts) | ||
Notice the output pulse does not increase when V_{in} is increased | |||
{| border="3" cellpadding="20" cellspacing="0" | |||
| V_{in} = 4 V || V_{in} = 7 V|| V_{in} =9V | |||
|- | |||
|[[File:TF_EIM_Lab9_P2_Vin4V.png | 200 px]] ||[[File: TF_EIM_Lab9_P2_Vin7V.png | 200 px]]||[[File: TF_EIM_Lab9_P2_Vin9V.png | 200 px]] | |||
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|} | |||
=Questions= | =Questions= | ||
#Explain your results in parts 1 & 2 in terms of the diode turn-on voltage. (20 pnts) | #Explain your results in parts 1 & 2 in terms of the diode turn-on voltage. (20 pnts) | ||
Latest revision as of 18:18, 4 March 2011
Lab 9: Diode Circuits
Clipping Circuit
1.) Construct the circuit shown below using a silicon diode.
Using Diode 1N5230B
And
R= 9.6k[math]\displaystyle{ \Omega }[/math]
2.) Use a sine wave generator to drive the circuit so [math]\displaystyle{ V_{in} = V_0 \cos(2 \pi \nu t) }[/math] where [math]\displaystyle{ V_0 = 0.1 }[/math] V and [math]\displaystyle{ \nu }[/math] = 1kHz. (20 pnts)
3.)Based on your observations using a oscilloscope, sketch the voltages [math]\displaystyle{ V_{in} }[/math] and [math]\displaystyle{ V_{out} }[/math] as a function of time.
Outoput for several input voltages near the bias point
| V_{in} = 0.5V | V_{in} = 0.6 V | V_{in} = 0.75 V | V_{in} = 0.8 V | V_{in} = 1.0 V |
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4.)Do another sketch for[math]\displaystyle{ V_0 }[/math] = 1.0 V and another for 10.0 V (DONT LET ANY SMOKE OUT!). (20 pnts)
| V_{in} = 1 V | V_{in} = 10 V |
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Differentiating Circuit with clipping
1.)Construct the circuit below.
2.)Select [math]\displaystyle{ R_1 }[/math] and [math]\displaystyle{ R_2 }[/math] such that the current from the +5V DC source is less than 1.0 mA and the DC voltage at [math]\displaystyle{ V_{out} }[/math] is 3 V when there is no input pulse.
[math]\displaystyle{ R_1= 15 k\Omega }[/math]
[math]\displaystyle{ R_2 = 10 k \Omega }[/math]
3.)Select a capacitor [math]\displaystyle{ (C) }[/math]and a pulse width [math]\displaystyle{ \tau }[/math] to form a differentiating circuit for the pulse from the signal generator. Hint: [math]\displaystyle{ R_{12}C \ll \tau }[/math].
[math]\displaystyle{ C = 10.5 nF }[/math]
4.)plot [math]\displaystyle{ V_{in} }[/math] and [math]\displaystyle{ V_{out} }[/math] as a function of time using your scope observations. (20 pnts)
| Signal setup | RC fall time |
 |
|
5.) Now add the diode circuit from part 1 to prevent [math]\displaystyle{ V_{out} }[/math] from rising above +5 V. Sketch the new circuit below.
6.)plot [math]\displaystyle{ V_{in} }[/math] and [math]\displaystyle{ V_{out} }[/math] as a function of time with the diode circuit you added using your scope observations. (the diode should clip off positive spikes)(20 pnts)
Notice the output pulse does not increase when V_{in} is increased
| V_{in} = 4 V | V_{in} = 7 V | V_{in} =9V |
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Questions
- Explain your results in parts 1 & 2 in terms of the diode turn-on voltage. (20 pnts)