Asee peer logo

Monolithic Integrated Circuit Function Generator Laboratory Procedure

Download Paper |


2000 Annual Conference


St. Louis, Missouri

Publication Date

June 18, 2000

Start Date

June 18, 2000

End Date

June 21, 2000



Page Count


Page Numbers

5.459.1 - 5.459.6



Permanent URL

Download Count


Request a correction

Paper Authors

author page

Theodore E. Fahlsing

Download Paper |

NOTE: The first page of text has been automatically extracted and included below in lieu of an abstract

Session 3226

Monolithic Integrated Circuit Function Generator Lab Procedure

Theodore E. Fahlsing Purdue University


This laboratory exercise will use the XR2206 monolithic IC function generator. The approach will place emphasis on the evaluation of specifications from Exar’s data sheets in comparison to laboratory measured data. The exercise will explore the parameters for setting frequency, amplitude, and waveform shape. The use of the function generator to produce amplitude modulation and frequency modulation signals will also be demonstrated. A complete schematic of a circuit suitable for construction will be provided.


The objective of the development of the circuit for this laboratory exercise was to exploit the XR2206 wide sweep range of 2000:1 to produce an audio function generator capable of frequencies from 20 Hz to 20kHz with only one range selection. Students are required to use the manufacturer’s data sheet to analyze the requirements to set the frequency, amplitude and waveform shape of the output. Using the generator to drive a speaker provides the opportunity to examine the effect of the 600Ω output impedance on a 4Ω or 8Ω speaker. This can initiate a discussion of how to decrease the output impedance using operational amplifiers and voltage followers. The amplitude and frequency modulation features usually will increase the students’ natural curiosity. The frequency modulation (FM) can produce some very interesting audio effects. Students should be encouraged and motivated to explore changing frequencies using the frequency shift keying (FSK) feature. The amplitude modulation (AM) feature can be demonstrated in an exciting fashion by changing the timing capacitance value to produce an approximate 600kHz signal in the AM broadcast frequency band. The modulation frequency can be heard on a standard AM radio receiver positioned close to the circuit. The positive and negative nine volts for the power supply was chosen for simplicity. The use of two nine volt batteries with the circuit provided for construction will result in a totally functional audio signal generator project. The author would like to encourage you to implement the use of the following laboratory exercise in the education of students.

Fahlsing, T. E. (2000, June), Monolithic Integrated Circuit Function Generator Laboratory Procedure Paper presented at 2000 Annual Conference, St. Louis, Missouri. 10.18260/1-2--8575

ASEE holds the copyright on this document. It may be read by the public free of charge. Authors may archive their work on personal websites or in institutional repositories with the following citation: © 2000 American Society for Engineering Education. Other scholars may excerpt or quote from these materials with the same citation. When excerpting or quoting from Conference Proceedings, authors should, in addition to noting the ASEE copyright, list all the original authors and their institutions and name the host city of the conference. - Last updated April 1, 2015