TF EIMLab8 Writeup - Revision history

Foretony: /* Questions */

2011-03-27T18:10:40Z

Questions

2011-03-27T18:09:47Z

Questions

2011-03-27T18:03:37Z

Reverse current

2011-03-27T18:02:02Z

Reverse current

2011-03-27T18:00:56Z

Reverse current

2011-03-27T17:59:06Z

Reverse current

2011-03-04T19:05:24Z

Reverse current

2011-03-04T19:05:09Z

Reverse current

2011-02-16T02:32:29Z

Graph

2011-02-16T02:22:54Z

Forward Current

← Older revision		Revision as of 18:10, 27 March 2011
Line 169:		Line 169:

	=Questions=		=Questions=
		+
		+
		+	1.) Plot the reverse biased diode for voltages beyond the turn on voltage and measure the effective impedance of the diode using a linear fit. (20 pnts)
		+
		+	2.)The measured reverse biased turn on voltage is _________ Volts for silicon diode type # IN_____________. The % difference between the measured turn on voltage and the one given in the specification is __________%. Circle the correct answer in the parentheses. This % difference (is / is not) within the measurement uncertainty. ( 10 pnts)
		+
		+	3.) Plot the forward biased diode and measure the effective impedance of the diode using a linear fit in the linear region at large bias voltages. ( 20 pnts)
		+
		+
		+	Old question

	#The reverse biased diode acts like a constant _____DC Voltage_______. (10 pnts)		#The reverse biased diode acts like a constant _____DC Voltage_______. (10 pnts)

@@ Line 170: / Line 170: @@
 =Questions=
-#The reverse biased diode acts like a constant ____________. (10 pnts)
+#The reverse biased diode acts like a constant _____DC Voltage_______. (10 pnts)
 #The forward biased diode has a very __________ resistance.  A reverse biased diode has a very ____________ resistance.(10 pnts)
 #The approximate DC forward resistance for diode #___________ is _________ when the forward current is _______________.(10 pnts)

@@ Line 18: / Line 18: @@
 V_{max} = 4.9 Volts
-I_{rev}^{max} = 5 \mu V at V = 2 Volts
+I_{rev}^{max} = 5 \mu A at V = 2 Volts
 .) Measure the diode reverse current <math>I_r < 1 \mu A</math> as a function of the DC supply voltage. (30 pnts)

@@ Line 16: / Line 16: @@
 P_{diode} = 0.5 Watts
 I_{rev}^{max} = 5 \mu V at V = 2 Volts
 .) Measure the diode reverse current <math>I_r < 1 \mu A</math> as a function of the DC supply voltage. (30 pnts)

@@ Line 16: / Line 16: @@
 P_{diode} = 0.5 Watts
-V_{ref} = 5 Volts
 V_{forw} - .6 Volts

← Older revision		Revision as of 17:59, 27 March 2011
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	3.) Calculate the value of R needed to observe the current without burning up the diode. What is the max reverse voltage you will have.		3.) Calculate the value of R needed to observe the current without burning up the diode. What is the max reverse voltage you will have.

−	3.) Measure the diode reverse current <math>I_r < 1 \mu A</math> as a function of the DC supply voltage. (30 pnts)	+
		+	P_{diode} = 0.5 Watts
		+
		+	V_{ref} = 5 Volts
		+
		+	V_{forw} - .6 Volts
		+
		+	4.) Measure the diode reverse current <math>I_r < 1 \mu A</math> as a function of the DC supply voltage. (30 pnts)

@@ Line 18: / Line 18: @@
 IN5230-B-T  (4.7 Volt Zener Diode),  The other diode is the IN5238B
-Data sheet =>IN5230-B-T_DataSheet.pdf
+Data sheet =>[[File:IN5230-B-T_DataSheet.pdf]]
 {| border="3"  cellpadding="20" cellspacing="0"

@@ Line 152: / Line 152: @@
 =Graph=
-# make the same measurements in parts 1 and 2 above for a germanium diode.
+#Plot the diode current (on the ordinate) versus the diode voltage (on the abscissa)for both the reverse and forward bias measurements. (50 pnts)
-#Plot the diode current (on the ordinate) versus the diode voltage (on the abscissa)for both diodes on the same graph. (50 pnts)
+[[File:TF_EIM_Lab8_V-vs-I.png| 200]]
 =Questions=

@@ Line 124: / Line 124: @@
 | Bias Volts || V_{scope} (1 M\Omega)(mV)|| Keithley ammeter
 |-
-| 0.922 \pm 0.005 ||1780 \pm 40 || 1740/50 = 34.8 mA
+| 0.922 \pm 0.005 ||1780 \pm 40 || 17.80 \pm 0.4 mA
 |-
-| 0.953 \pm 0.005 || 2800 \pm 40 ||
+| 0.953 \pm 0.005 || 2800 \pm 40 || 28.0 \pm 0.4
 |-
-| 1.00 \pm 0.005 ||  4280\pm 50||
+| 1.00 \pm 0.005 ||  4280\pm 50|| 42.8 \pm 0.5
 |-
 |  ||  ||