This circuit was obtained from a 1969 Electronic Design. Transistors admit modern equivalents. The frequency of the signals is set to R2.
This basic oscillator with tunnel diode generates a 100 kHz signal with 1 uW output power. The...
This amplifier for medium or high impedance magnetic headsets (above 200 ohms) was found in an...
This circuit provides precise signals of three frequencies, using CMOS technology. The integrated...