Wein bridge oscillator

472

09:44:52

Fo= 954hz

published 8 years ago

shahraj

8 years ago

Shake to start oscillations

doni69

8 years ago

Could you tell me please whats this circuit about?

vinithnayakaN

8 years ago

How ca

vinithnayakaN

8 years ago

How is it absorbing noise by shaking itself

shahraj

8 years ago

@doni69 this circuit is an oscillator, used to produce required frequency oscillations at the output, the frequecy depends on the value of r and c connected to the non inverting terminal of op amp

thebugger

8 years ago

But the waves would either be decaying or would go into cutoff distortion. In your case they're decaying. In reality, one would use a simple incandescent bulb to create some voltage controlled negative feedback, and stabilize the amplitude of the oscillations on a given level. The light bulb works best because it has a much lower time constant than a typical oscillation frequency of this oscillator, thus it introduces less distortion into it.

illiux

8 years ago

Another option is a jfet acting as a voltage controlled resistor along the feedback path. Take the output, then rectify it and lowpass filter it to measure the amplitude. The resulting voltage feeds the jfet gate. I've used this approach successfully on a variety of oscillators.

thebugger

8 years ago

Yes, it's a way of AGC, sure, but you'll get least distortion from a bulb. I think best case scenario can get you below 0.01% or something

Vishal123456789

8 years ago

How to see oscillations

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.