Negative Feedback Stage (CB6131E)

This circuit is from a 1967 US publication. The configuration can serve as a basis for designs with modern components.

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Active bass and treble control (CB21296E)
This active tone control circuit was found in American documentation from the 90's. The transistor can...
Pulse Generator XR2206 (CB24509E)
We found this circuit in the Radio Electronics magazine of May 1977. The circuit has the frequency...
Programmable Timer (CB18805E)
Intervals of more than 39 hours can be obtained with this programmed circuit that we found in a...