741 Filter (CB24265E)

The 1 kHz tuned filter shown uses a 741 op-amp. The components can be re-scaled to suit the desired frequency.

Audio Wattmeter (CB17404E)
This circuit is from 2002 documentation. It injects a signal into a power amplifier and measures the...
60 Hz Elliptical Filter (CB17613E)
The integrated circuit used in this project is not the most common. The use of a crystal...
One Quadrant Logarithmic Converter (CB15070E)
This configuration was found in an American publication from the 90s. Operators admit equivalents just...