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 was found in documentation from the 1980s. The circuit uses several components of the...
The National Semiconductor LM143 integrated circuit consists of a high voltage operational...
Found in a 1970s documentation, this mini-organ toy circuit makes use of an integrated circuit from...