LM3900 Positive Differentiator (CB5054E)

The circuit shown in the figure has an output voltage rise time of 0.22 ms and an input time constant of approximately 1 ms.

Manual Advertisement Canceller (CB4217E)
The idea is simple: using a flashlight to cut your TV commercials triggers a relay that turns off...
1 Hz Oscillator with Quadrature Output (CB4841E)
This circuit is from an operating manual from the 1990s. The circuit generates sinusoidal and cosine...
Null Beat Indicator (CB4895E)
This indicator for audio signals uses only 3 components. LEDs are common and the audio signal with...