Bilateral current source 2 (CB20819E)

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

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Common Collector Stage (CB4937E)
This is a typical common collector amplifier step configuration. The transistor can be used...
17 V x 1.5 A Power Supply (CB985E)
This unregulated power supply can source 1.5 A to amplifiers and other circuits. The diodes must...