Negative Feedback Stage (CB6131E)

This circuit is from a 1967 US publication. The configuration can serve as a basis for designs with modern components.

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50 to 150 MHz oscillator (CB9629E)
This overtone oscillator can generate signals up to 150 MHz. The crystal determines the frequency and...
Ultrasound Emitter (MSB122E)
The circuit shown by the figure below can produce signals in the range between 20 kHz and 30 kHz....
Audio IR Link (CIR811E)
This circuit is used to convert audio signals from na amplifier into infrared modulated signals....