This 1 kHz circuit was found in American documentation from the 90s. The original operational amplifier consists of a double 741 at the time. The power supply must be symmetrical.
This circuit uses only passive components calculated for the desired frequency. We found it in an...
This unijunction relaxation oscillator can be used as a very useful signal injector. The circuit is...
Found in a 1965 Electronic Design, this circuit divides the frequency of a 50 MHz signal by 2. The...