1 Khz Sinewave oscillator

233

02:17:32

The first opamp generates a 1Khz square wave this then feeds a low pass filter ( Sallen Key 3rd order ) with a cutoff frequency of 250Hz, this will remove most of the harmonics of the square wave leaving behind the 1 KHz fundamental , the third opamp increases the output amplitude which can also be varied ( the amplitude )  with the potentiometer.

published 9 years ago

BillyT

9 years ago

Yes, it works, just needs a couple of adjustments; http://everycircuit.com/circuit/5423079987871744

gasboss775

9 years ago

BillyT: I cant get your link to work, probably because im on my android tablet and use the Everycircuit android app, things that run in browsers dont tend to work well on Android tablets in my experience. Could you describe the modifications that you made?

Issy

9 years ago

Pro nastartování stačí připojit paralelně k odporu 1kΩ (vlevo nahoře) zdroj =1V v sérii s tlačítkem (mínus na zem, plus na tlačítko, druhý pól tlačítka k operačnímu zesilovači) ... a pak použít ... to tlačítko ;-D @@@ $$$ ### === --- To start simply connect 1kΩ resistor in parallel to the (upper left) source =1V in series with a button (minus on ground, plus a button, the button for the second pole operational amplifier) ... and then use ... that button ...;-D

2ctiby

9 years ago

A slight variation... http://everycircuit.com/circuit/5972789228208128

add comment in editor

EveryCircuit is an easy to use, highly interactive circuit simulator and schematic capture tool. Real-time circuit simulation, interactivity, and dynamic visualization make it a must have application for professionals and academia. EveryCircuit user community has collaboratively created the largest searchable library of circuit designs. EveryCircuit app runs online in popular browsers and on mobile phones and tablets, enabling you to capture design ideas and learn electronics on the go.