This filter, with a cut-off frequency of approximately 1 kHz, has a high Q and employs two operational ones. The power supply must be symmetrical.
This circuit makes use of an uncommon integrated circuit. It can provide a power of 6 W when...
Found on Popular Electronics from the 1990s, this oscillator uses a general purpose transistor. The...
This circuit operates at a frequency of 80 KHz and modulation up to 60 kHz. The circuit is from...