This circuit with an unusual configuration was found in the January 1974 issue of Radio Electronics magazine. The frequency is given by L1/C1, and the transistors admit equivalents.
The operational amplifier used in this circuit is a low voltage type from Texas Instruments, being...
Found in an English Maplin documentation from 1983, this circuit generates separate frequency...
The presented circuit consists of a double phase shift oscillator capable of generating two sine...