EEVblog Electronics Community Forum

Electronics => Beginners => Topic started by: queennikki1972 on July 30, 2019, 02:40:38 pm

Title: Signal Generator - Working Diagram?
Post by: queennikki1972 on July 30, 2019, 02:40:38 pm

Can anyone verify if this is a working diagram?

https://maker.pro/custom/tutorial/how-to-build-a-signal-generator

(https://maker.pro/storage/IBvCrpN/IBvCrpNMM3p2dyJB6nAejyCaUKZZC1haDt9Xiedb.jpeg)

Title: Re: Signal Generator - Working Diagram?
Post by: ledtester on July 30, 2019, 02:52:16 pm

Here's a simpler op-amp function generator circuit that you might find helpful:

http://www.learningaboutelectronics.com/Articles/Function-generator-circuit.php (http://www.learningaboutelectronics.com/Articles/Function-generator-circuit.php)

Title: Re: Signal Generator - Working Diagram?
Post by: Zero999 on July 30, 2019, 05:13:00 pm

Quote from: queennikki1972 on July 30, 2019, 02:40:38 pm

Can anyone verify if this is a working diagram?

https://maker.pro/custom/tutorial/how-to-build-a-signal-generator (https://maker.pro/custom/tutorial/how-to-build-a-signal-generator)

Yes, design will work quite well up to a few kHz.

Quote from: ledtester on July 30, 2019, 02:52:16 pm

Here's a simpler op-amp function generator circuit that you might find helpful:

http://www.learningaboutelectronics.com/Articles/Function-generator-circuit.php (http://www.learningaboutelectronics.com/Articles/Function-generator-circuit.php)

Yes, that will also work. The big downside is the amplitude of the triangle and sine wave outputs will vary, depending on the frequency setting.

One way to overcome this issue is to use a triangle wave generator and a triangle-to-sine converter circuit. See the thread linked below:
https://www.eevblog.com/forum/beginners/simple-analog-function-generator-design/msg1174983/#msg1174983 (https://www.eevblog.com/forum/beginners/simple-analog-function-generator-design/msg1174983/#msg1174983)