Bilateral current source 2 (CB20819E)

We found this circuit in an American publication from the 1980s. Equivalent modern operational amplifiers can be used.

Fiber Optic Receiver (CB14601E)
This circuit was found in the Linear Technology Applications of 1997. The circuit uses components from...
Walkman Power Supply (CB17969E)
This is a 5 V power supply from 2002 documentation, suitable for walkmans and diskmans, common at the...
Bidirectional ramp generator (CB8934E)
In fact, this 1967 Electronic Design circuit generates two symmetrical ramps whose frequency...