Found in a 1964 Electrronic Design, this circuit is intended to control analog video signals. The circuit has an attenuation of 45 dB at 20 kHz.
This circuit was obtained in an Electronics Now from the 90s. The circuit uses operational...
This circuit operates at a frequency around 1 MHz, having been found in a technical documentation from...
The TAA131 used in this circuit is not very easy to find today, but an equivalent low power audio...