The frequency of this circuit depends on C1 and, for the indicated values, it is 1 kHz. Equivalent operational amplifiers can be used, and the power supply must be symmetrical.
This circuit was obtained in a manual of operational amplifiers of 1973. The circuit uses...
The figure shows an application of the LM377 in a small inverting stereo amplifier with output...
This circuit for experimental radios and other applications is from a documentation from the 50's....