XR2206 Based Audio Sinus Generator

Summary/Usage

This device is a simple audio frequency generator. It can be used for general purpose measurements in the electronics lab.

Functional Description

I designed for the following features:

Manual logarithmic frequency control using a 10-turn potentiometer
Manual choice between sine and triangle wave form
Manual volume and phase control
Manual DC-offset control
Input jack for logarithmic frequency modulation. This is useful to sweep the whole audio range
Input jack for amplitude modulation
50 Ω impedance output jack.

I chose the classical XR2206 analog monolithic function generator. I did not use the rectangular wave capability, because I got another device covering that.

Performance Specs

Frequency from 10 Hz to 100 KHz
Output maximum voltage 10 V peak-to-peak at no load.

Schematics (SVG file)

Sinus Generator Schematics

Documentation and Kicad files

More details about functionality and design can be found in the ZIP-Archive.

Mechanics

PCB View

Front View

Legal Notices

Copyright

I do not intend to offer/sell this!

I publish here the electrical schematics and the mechanical design, such that you could build your own device. I put all the files of this project under the GPL2 open-source license. See the file COPYING.TXT. This is hence open hardware.

Disclaimer

Actual construction of the circuit requires a significant knowledge of electronic circuit design and construction beyond what is presented here. The author, Dr. Thomas Redelberger, does not warrant operability, reliability, suitability or safety of any of the circuits. Anyone who constructs and/or uses these circuits accepts all responsibility for their operation and safety.