This document summarizes an AF signal generator. It provides sinusoidal and square waveforms from 20 Hz to 20 kHz. It uses a Wein bridge oscillator circuit to generate a perfect sine wave with low distortion and excellent frequency stabilization from a few Hz to 200 kHz. The front panel includes controls for frequency selection, amplitude adjustment, and waveform selection/symmetry. Specifications include a frequency range of 10Hz to 1 MHz, output amplitudes of 5 mV to 5 V for sine waves and 0-20 V for square waves.

1. AF SIGNAL GENERATORS
Prepared By:
• Sagar Soni – BM2010021
• Maitri Tanna – BF2010022

2. WHAT IS AF SIGNAL GENERATOR ?
• The signal generators which provide sinusoidal &
square waveforms are called Frequency Signal
Generators.
• It is operated in range 20 Hz to 20 kHz.

3. BLOCK DIAGRAM

4. WEIN BRIDGE OSCILLATOR

5. ADVANTAGES
• The output is perfect sine wave.
• It has low distortion and excellent frequency stabilization.
• It has wide frequency range i.e few Hz to 200 kHz.

6. SCHIMMIT TRIGGER

7. OUTPUT OF SCHIMMIT TRIGGER

8. FRONT PANEL CONTROLS
1. FREQUENCY SELECTOR: This helps in selecting frequency in different ranges. This
varies frequency in the ratio 1:11 which is non-linear.
2. FREQUENCY MULTIPLIER: It increases frequency range for more than 5 decades
from 10 Hz to 1 MHz.
3. AMPLITUDE MULTIPLIER: It attenuates the signal in 3 decades namely x1, x0.1,
x0.01.
4. SYMMETRY CONTROL: It varies the symmetry of square wave form from 30% to 70%
5. SINE AMPLITUDE: It attenuates the amplitude of square signal.
6. SQUARE AMOLITUDE: It attenuates the amplitude of square signal.
7. FUNCTION SWITCH: It selects the mode required either sine wave output or square
wave output.
8. SYNC: This terminal provides synchronization of the integral signal with external signal.
9. ON-OFF SWITCH

11. SPECIFICATIONS
• FREQUENCY RANGE: 10Hz to 1 MHz
• AMPLITUDE OF SINE WAVE: 5 MV TO 5 V( rms )
• AMPLITUDE OF SQUARE WAVE: 0-20 V(peak)
• SYMMETRY OF SQUARE WAVE: 30 % - 70%
• OUTPUT IMPEDANCE: 600 ohms
• POWER: 7 W

12. THANK YOU