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 90s Popular Electronics, this circuit excites a 40 kHz ultrasonic transducer. The...
This circuit was suggested by Electronic Engineering in a 1980s publication. The circuit makes use...
In this circuit R1 is 56 ohm and R2 is 220 ohm for the 110 V network. SCRs are according to the...