SINE WAVE OSCILLATOR: Twin T RC Filter OSC with LTSpice Simulation and Breadboarded Circuit

Linear oscillator circuits designed with RC filters in the feedback loop of an amplifier can generate sine waves that are usable in audio applications like test tone generators, analog synth sounds etc.

One RC oscillator that can produce these sine waves is the Twin T oscillator configuration. Let's look at the theory of using an amplifier as an oscillator, simulate the Twin T filter network and op amp oscillator in LTSpice, and build the circuit on a breadboard.

Note: in the video I forgot to point out that I didn’t have 16 K resistors so I used 20 K and that will have a big impact on the frequency and that’s how we got from around 1 kHz down to around 650 kHz.

RC Oscillator Info
https://en.wikipedia.org/wiki/RC_osci...
https://pdfs.semanticscholar.org/e5cb...
https://www.electronics-tutorials.ws/...
http://www.n5dux.com/ham/files/pdf/RC...

Twin T Oscillator and Filter Info
http://www.eng.auburn.edu/~deanron/Le...
http://fourier.eng.hmc.edu/e84/lectur...
http://www.discovercircuits.com/Andy/...
https://www.nutsvolts.com/magazine/ar...
https://www.theremin.us/Circuit_Libra...

LTSpice Files
https://github.com/GadgetReboot/misc_...

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