here you can find the theory of the Wien Bridge oscillator
here you can find a description of how a phase shift oscillator works
one more document from TI about oscillators. (2)
Which are the differences between these devices and the multivibrators that we studied?
Here you may access a document about sinusoidal oscillators from TI (1)
read pages 3, 4, 5, 6 and try to understand how the device of page 15 named "phase shift oscillator " works. Simulate it in multisim.
On multisim 14 the op amp suggested is included in the library.
1.Then try to simulate the device shown at page 16.
What are the differences between the two devices?
At page 15 of document (1) a phase shift oscillator is presented.
2.Verify its oscillation frequency by means of the formula and simulate it on multisim.
quadrature oscillator english version (1) page 18, (2) page 36
3. try to simulate a quadrature oscillator that you design.
here I made available a working quadrature oscillator
- show the various signals inside the devices
- explain how you can start the oscillation,
- what is the purpose of the trimmers whe spoke of at the lesson
- why these devices oscillate steadily,