Optical fiber receiver (CB9736E)

This high sensitivity receiver of 30 nW was found in documentation from the 1980s. Integrated circuits are from that time.

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Unijunction Monostable (CB13598E)
This circuit is from a 1974 publication by Motorola. The unijunction may be 2N2646 and bipolar BC558...
Operational with current booster (CB25182E)
The figure shows how to obtain a higher output current for an operational amplifier. With the...
Telephone Scrambler (CB25490E)
This voice scrambling scrambler was published in the August 1982 issue of Radio Electronics...