ed exp 24
DESCRIPTION
LAB ELECTRONICS 18TRANSCRIPT
7/17/2019 ED Exp 24
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Laboratory Exercises for Electronic
Devices, Buchla, © 2001 Prentice-Hall,
Inc
Experiment 24
Troubleshooting Problem
A student constructsthe circuit shownbelow and fnds that
the output is hal-wave rectifed! eescope view"# Powersuppl$ voltages arechec%ed and correct#uggest a cause or
the problem# & ' ( )* n d
' ( ) +
, r o m, u n c t io n* e n e r a t o r
- )
- )
.nput/ (m)0div accoupled
1utput/ ( )0divac coupled
7/17/2019 ED Exp 24
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Laboratory Exercises for Electronic
Devices, Buchla, © 2001 Prentice-Hall,
Inc
Experiment 24
Troubleshooting Problem
olutionA student constructsthe circuit shownbelow and fnds that
the output is hal-wave rectifed! eescope view"# Powersuppl$ voltages arechec%ed and correct#uggest a cause or
the problem#
- )
- )
.nput/ (m)0div accoupled
1utput/ ( )0divac coupled
The student ac coupled the scopeso missed the act that there is dc
oset on the input rom theunction generator! This causedthe output to nearl$ saturate#
The tendenc$ is to blame the op-amp frst3 but that is rarel$ the
problem#
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Laboratory Exercises for Electronic
Devices, Buchla, © 2001 Prentice-Hall,
Inc
Experiment 24
elated Problem
& ' ( )
* n d
' ( ) +
, r o m, u n c t io n
* e n e ra t o r
5raw the schematic or the circuit shown#5etermine the gain and the inputresistance#
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Laboratory Exercises for Electronic
Devices, Buchla, © 2001 Prentice-Hall,
Inc
Experiment 24
elated Problem olution
& ' ( )
* n d
' ( ) +
, r o m, u n c t io n
* e n e ra t o r
5raw the schematic or the circuit shown#5etermine the gain and the inputresistance#*ain 6 -'( %Ω07#7 %Ω 6 - 4#(4 R
in
6 7#7 %Ω
R i
! " " # Ω
1 $ # Ω
1 0 % &
1 0 % &
2
"
'
(
)*
* 1 $ +
( ) 1 ,
+
1 $ + +