This circuit generates a sinusoidal signal with only -80 dB THD. The circuit was found in a 90's EDN. The frequency is 25 kHz and the components used are from that time.
Found in a 1965 General Electric documentation, this circuit uses a zener diode to obtain the...
This oscillator with common general-purpose transistors appeared in Radio Electronics magazine in...
Found in a 90s American documentation, this circuit can be used as a shield, just change the...