This document describes a signal generator circuit that uses the ICL8038 integrated circuit. It explains how the ICL8038 generates repeating electronic signals using two current sources and a comparator to charge and discharge a capacitor in a cycle. It provides the equation to calculate the output frequency based on the capacitor and resistor values. It also lists the typical components used and applications like testing electronic devices and circuits by injecting waveforms.

1. signal generator
electronic devices that
generate repeating or
non-repeating
electronic signals

2. ICL8038

3. Working of ICL8038
•Capacitor C
•Current source #1
•Current source #2 (OFF)
•Capacitor charges with current I
•Comparator 1 = 2/3 of input voltage
•Flip flop is triggered
•Current source #2 (ON) current 2I
•Capacitor discharges with current I
•Comparator 2= 1/3 of input voltage
•Flip flop is resetted
•Cycle gets repeated

4. Comparator

5. BUFFER

6. function generator circuit using
ICL8038
The Frequency output (f)
= 0.15/(VR1+R1)C1

7. Modified

8. Components
• Frequency range C1 value
1Hz – 100Hz=1uF
100Hz-1KHz=0.1uF
1KHz-10KHz=0.01uF
10KHz-100KHz=0.001uF
• The components list
Resistors size 1/4W 5%
R1=2.2K
R2=10K
VR1=10K Single potentiometer
Capacitors
C1 (above mentioned)
Semiconductor
IC1=ICL8038=Precision Waveform Generator/ Voltage Controlled
Oscillator

9. Applications
• The waveforms can be injected into a device under
test and analyzed as they progress through
it, confirming the proper operation of the device or
pinpointing a fault in it.
• Like Using it to test any measurement
equipment, apply signals as input to electronic
circuits.
• to calibrate a microphone setup.

10. Thank you