Micro amplifier (CB23733E)

This direct coupled amplifier using 3 transistors and low voltage power was found in the April 1961 Radio Electronics magazine.

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NB FM audio amplifier (CB7462E)
Found in a documentation from the 90s, this circuit limits and amplifies a voice signal in the 800...
Fence Electrifier (CB12895E)
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Low voltage drop regulator (CB21216E)
This simple LDO, or low voltage drop regulator was found in an Electronic Design from the 90s. The...