Word Compressor with Gain Control (CB19997E)

We found this circuit in a documentation from the 70s. The circuit uses amplifiers from the time, but it can be implemented with modern equivalents.

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Video loop with controlled gain (CB8738E)
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CMOS and MOSFET Power Control (CB11893E)
In the figure we show how to connect a power MOSFET to the output of a CMOS function to control a power...
Super regenerative receiver (CB22526E)
This receiver using a FET appeared in a November 1957 Radio Electronics magazine. It is one of the...