Suggested by an American documentation from the 90s, this circuit generates signals with frequencies determined by the capacitors and calculated by the formula next to the diagram.
This oscillator was found in the November 1986 issue of Radio Electronics magazine. The frequency...
We found this circuit in Motorola's Linear Databook in 1990. The integrated circuit used is no...
This circuit was found in American documentation from the 1960s. The operational amplifier is from that...