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:

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 :

Output Amplifier:

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 :