Vertical blank circuit (CB9412E)

Found in a Philips documentation from 1967, this circuit is intended for applications with analogue TV of the time.

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Low distortion sinusoidal oscillator (CIR21117E)
Found in National Semiconductor documentation from the 1980s, this circuit can be implemented with...
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3 kHz Notch Filter (CB13567E)
We found this circuit in a publication on operational amplifiers from 1978. The circuit is made...