Download Function Generator

Function Generator
Dr. Fotowat & Dr. Kavehvash
Prepared by Mostafa Hosseini
Pulse to Triangular Voltage Circuit:
Pulse to Triangular Voltage :
Simple Circuit (pulse to triangular):
Too simple circuit (pulse to triangular):
Input : H ------> output increase
Input : L------> output decrease
Buffer (FET):
Buffer circuit :
• Infinite impedance
• Zero-DC shift
Amplifier:
Frequency Range Circuit:
Frequency Range Circuit:
Triangular to Sin Voltage Circuit :
Triangular to Sin Voltage Circuit :
When amplitude of triangular voltage increase--->first D112:on
--->R=R159+R166
By increasing amplitude--->D111:on
--->R=[(R158+R165)||R159]+R166
.
.
.
As you see, gain decrease and our triangular voltage has been
converted to sin voltage.
Simple simulation:
Simple Circuit (Triangular to Sin Voltage) :
By Changing Gain(when input increase, gain decrease)We Can
Convert Triangular to Sin Voltage.
•
Function Generator generate pulse, sin and triangular voltage continuously …
Choose a
Wave-Form
Amplifier
Choose output
range
10dB,20dB,40dB
Circuit of Wave-Form Select :
Circuit of Wave-Form Select :
Output Amplifier:
Output Amplifier:
Circuit of output range (10dB,20dB,40dB) :
Circuit of output range (10dB,20dB,40dB) :
• Function Generator needs DC voltage for biasing. So we should provide DC
voltage by Regulator. We use MC7815 and MC7805 to provide -15V & -5V.
Also for +15V and +5V, MC7915 and MC7905 has been used.
• The blow circuit has been designed for providing +10V & -10V.
+10V & -10V DC Voltage Circuit :