This circuit was obtained from the July 1970 issue of Radio Electronics magazine. Zeners are power types that can provide a good current to the circuit. Selection is made by rotary switch.
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...