PCM switching (CB9403E)

Using a tunnel diode, this circuit was found in a 1966 American publication. The circuit is for signals sampled at a speed of 8,000 sps.

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Integrated Intercom (CB16336E)
We found this circuit in a 1982 documentation. An intercom to be good must be sensitive and have...
Small Motor Control (CB19564E)
This small control for DC motors up to approximately 1 A uses an operational amplifier that admits...
Wien Bridge Oscillator (CB3913E)
This circuit generates low-frequency sinusoidal signals. The variable capacitor is dual and the...