The frequency of this circuit, for the indicated components, is 1 kHz. Other operational amplifiers can be used, and the power supply must be symmetrical.
Found in a 90s Electronic Design, this suggestion to have a higher voltage in a fixed regulator...
Here we show an oscillator that uses an LC network. The upper limit depends on the power-supply...
In the figure we have the circuit of a simple voltmeter with a 50 uA instrument and a 2k coil. The...