2. ◦ Function Generators can produce Square, Triangular and
Sinusoidal waveforms over a wide range of frequencies and
amplitudes as well as modulated waveforms (AM, FM, FSK)
and signal noise.
Why a Function Generator?
◦ Essential tool in Electrical Engineering
◦ Can be implemented with basic inexpensive components
◦ Most circuits needed have a direct relevance to the course
Project Objectives
◦ To build a low-cost Function Generator capable of:
Producing Square, Triangular and Sine waveforms with
amplitude control
adjusting the waveform frequencies up to 1 MHz or
higher
The function generator should be low cost
SISTEC-E
3. In this Presentation we will talk about:
◦ The Design
◦ Performance & Results
◦ Advantages & Disadvantages (Conclusion)
SISTEC-E
4. Block Diagram
◦ Voltage Controlled
Oscillator (VCO)
◦ Level Detector
◦ Sine Shaping Circuit
◦ Output stage
(Variable Power
Amplifier)
Voltage
Controlled
Oscillator
Level
Detector
Sine Shaping
Circuit
Amplifier
Stage
Voltage
Controlled
Oscillator
Level
Detector
Sine Shaping
Circuit
Amplifier
Stage
SISTEC-E
5. Wien Bridge Sine
Oscillator
Compensated Triangle
Oscillator Using LM6365
Triangle Oscillator with
double Detector Circuit
Crystal Oscillator
Voltage
Controlled
Oscillator
Level
Detector
Sine Shaping
Circuit
Amplifier
Stage
Simplified Triangle Oscillator with single voltage detector
(Final VCO based on this circuit)
SISTEC-E
