Found in a 90's EDN, this circuit generates signals in the frequency range given by the graph. The circuit requires a symmetrical power supply.
With this preamplifier it is possible to use a small speaker as a microphone. The circuit is also...
We found this circuit in the September 1995 issue of Electronics Now magazine. The circuit has 6...
Other operational Amplifiers in the series, such as the MC34072, MC34074, MC35071, MC35072,...