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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Timed Residential Alarm (CB16452E)
This sophisticated home alarm was found in a 1992 publication. Using common components, it has...
Balance Indicator (CB17570E)
This circuit, which uses a VU-meter with zero in the center of the scale, which is not easy to...
Bandpass Filter - 741 (CB12589E)
A frequency range determined by the network of resistors and capacitors with negative feedback and input...