Precision Current Source (CB21052E)

Found in National Semiconductor documentation from the 1990s, this circuit employs basic components from the time.

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High sensitivity photo Darlington (CB8259E)
Found in a 1968 Ferranti documentation, this circuit can be implemented with modern equivalent...
M5600 Pressure Transducers with Bluetooth (COM055E)
August 2016 - It can be obtained from Mouser Electronics the new pressure transducer M5600 from TE...
MW or SW Tuner (CB4161E)
This circuit was obtained from an ancient American documentation. The coil consists of 80 to 100...