1 files changed, 25 insertions, 0 deletions
diff --git a/281/CH7/EX7.8/example7_8.sce b/281/CH7/EX7.8/example7_8.sce
new file mode 100755
index 000000000..a77ae8658
--- /dev/null
+++ b/281/CH7/EX7.8/example7_8.sce
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+disp('chapter 7 ex7.8')
+disp('given')
+disp('design a peak detector circuit')
+disp('pulse-type signal voltage Vp=2.5volt with a rise time tr=5*10^(-6)s')
+Vp=2.5
+tr=5*10^(-6)
+disp('output voltage is 2.5v for time th=100*10^(-6)s')
+th=100*10^(-6)
+disp('maximum output error is to be 1%')
+disp('use BIFET op-amp for minimum capacitor leakage current')
+disp('let R1=R2=1Mohm')
+disp('C1 discharge current,Id=IrD2=1*10^(-6)A')
+Id=1*10^(-6)
+disp('v=1% of Vp')
+v=.01*Vp
+disp('volts',v)
+disp('C1=Id*th/v')
+C1=Id*th/v
+disp('farads',C1)    //standard value
+disp('for op-amp A1,Iomax=C1*Vp/tr')
+Iomax=C1*Vp/tr
+disp('amperes',Iomax)
+disp('slewrate=3*Vp/tr')
+slewrate=3*Vp/tr
+disp('volts/us',slewrate)
+\ No newline at end of file