Photodiode amplifier (CB20691E)

This high-gain circuit was found in American documentation from the 1990s. The operational amplifier supports a modern equivalent.

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Didactic comparator (CB6093E)
This simple demonstration circuit was found in a Popular Electronics of the 1980s. It can be...
Mini Audio Generator CIR1296S (CB1395E )
This Hartley-type audio oscillator was obtained in an earlier 1973 publication. It can be...
Bistable with the LM3900 (CB14202E)
We found this circuit in the National Semiconductor's Linear Applications Handbook of 1994. The...